/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/concurrent_mult.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 20:30:48,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 20:30:48,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 20:30:48,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 20:30:48,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 20:30:48,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 20:30:48,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 20:30:48,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 20:30:48,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 20:30:48,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 20:30:48,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 20:30:48,259 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 20:30:48,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 20:30:48,259 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 20:30:48,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 20:30:48,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 20:30:48,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 20:30:48,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 20:30:48,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 20:30:48,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 20:30:48,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 20:30:48,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 20:30:48,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 20:30:48,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 20:30:48,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 20:30:48,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 20:30:48,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 20:30:48,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 20:30:48,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 20:30:48,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 20:30:48,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 20:30:48,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 20:30:48,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 20:30:48,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 20:30:48,262 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 20:30:48,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 20:30:48,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 20:30:48,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 20:30:48,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 20:30:48,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 20:30:48,609 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 20:30:48,610 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 20:30:48,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/concurrent_mult.bpl [2021-06-05 20:30:48,611 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/concurrent_mult.bpl' [2021-06-05 20:30:48,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 20:30:48,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 20:30:48,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 20:30:48,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 20:30:48,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 20:30:48,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... [2021-06-05 20:30:48,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... [2021-06-05 20:30:48,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 20:30:48,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 20:30:48,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 20:30:48,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 20:30:48,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... [2021-06-05 20:30:48,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... [2021-06-05 20:30:48,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... [2021-06-05 20:30:48,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... [2021-06-05 20:30:48,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... [2021-06-05 20:30:48,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... [2021-06-05 20:30:48,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... [2021-06-05 20:30:48,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 20:30:48,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 20:30:48,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 20:30:48,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 20:30:48,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 20:30:48,741 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2021-06-05 20:30:48,741 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2021-06-05 20:30:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2021-06-05 20:30:48,741 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 20:30:48,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 20:30:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 20:30:48,742 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 20:30:48,847 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 20:30:48,848 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 20:30:48,849 INFO L202 PluginConnector]: Adding new model concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:30:48 BoogieIcfgContainer [2021-06-05 20:30:48,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 20:30:48,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 20:30:48,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 20:30:48,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 20:30:48,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:48" (1/2) ... [2021-06-05 20:30:48,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a81150 and model type concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 08:30:48, skipping insertion in model container [2021-06-05 20:30:48,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:30:48" (2/2) ... [2021-06-05 20:30:48,855 INFO L111 eAbstractionObserver]: Analyzing ICFG concurrent_mult.bpl [2021-06-05 20:30:48,860 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 20:30:48,860 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 20:30:48,860 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 20:30:48,861 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 20:30:48,880 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,880 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,880 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,881 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,881 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,881 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,881 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,881 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,882 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,882 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,882 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,882 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,882 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,883 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,883 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,883 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,883 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,883 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,884 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,884 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,884 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,884 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,885 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,885 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,885 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,885 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,886 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,886 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,886 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,886 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,886 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,887 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,887 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,887 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,887 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,887 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,887 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,888 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,888 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,888 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,888 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,888 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,888 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,889 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,891 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,891 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,895 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,895 WARN L313 ript$VariableManager]: TermVariabe multThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:48,902 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 20:30:48,919 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 20:30:48,935 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:30:48,935 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 20:30:48,936 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:30:48,936 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:30:48,936 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:30:48,936 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:30:48,936 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:30:48,936 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 20:30:48,951 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 25 transitions, 66 flow [2021-06-05 20:30:48,967 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 70 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:48,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:48,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:48,975 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:48,975 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:48,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:48,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1514235646, now seen corresponding path program 1 times [2021-06-05 20:30:48,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:48,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92865256] [2021-06-05 20:30:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:49,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:49,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92865256] [2021-06-05 20:30:49,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92865256] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:49,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:49,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:49,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884756023] [2021-06-05 20:30:49,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:30:49,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:49,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:30:49,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:30:49,322 INFO L87 Difference]: Start difference. First operand has 70 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:49,481 INFO L93 Difference]: Finished difference Result 121 states and 223 transitions. [2021-06-05 20:30:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:30:49,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:49,497 INFO L225 Difference]: With dead ends: 121 [2021-06-05 20:30:49,497 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 20:30:49,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 20:30:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2021-06-05 20:30:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 76 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 147 transitions. [2021-06-05 20:30:49,549 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 147 transitions. Word has length 15 [2021-06-05 20:30:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:49,550 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 147 transitions. [2021-06-05 20:30:49,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 147 transitions. [2021-06-05 20:30:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:49,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:49,553 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:49,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 20:30:49,555 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:49,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:49,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1923046412, now seen corresponding path program 2 times [2021-06-05 20:30:49,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:49,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864201152] [2021-06-05 20:30:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:49,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:49,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864201152] [2021-06-05 20:30:49,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864201152] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:49,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:49,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:49,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943040417] [2021-06-05 20:30:49,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:30:49,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:30:49,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:30:49,671 INFO L87 Difference]: Start difference. First operand 77 states and 147 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:49,773 INFO L93 Difference]: Finished difference Result 143 states and 275 transitions. [2021-06-05 20:30:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:30:49,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:49,782 INFO L225 Difference]: With dead ends: 143 [2021-06-05 20:30:49,783 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 20:30:49,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:30:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 20:30:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 89. [2021-06-05 20:30:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 173 transitions. [2021-06-05 20:30:49,797 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 173 transitions. Word has length 15 [2021-06-05 20:30:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:49,797 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 173 transitions. [2021-06-05 20:30:49,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 173 transitions. [2021-06-05 20:30:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:49,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:49,798 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:49,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 20:30:49,799 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:49,799 INFO L82 PathProgramCache]: Analyzing trace with hash -837075856, now seen corresponding path program 3 times [2021-06-05 20:30:49,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:49,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397874730] [2021-06-05 20:30:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:49,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:49,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397874730] [2021-06-05 20:30:49,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397874730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:49,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:49,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:49,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880890784] [2021-06-05 20:30:49,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:30:49,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:30:49,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:30:49,869 INFO L87 Difference]: Start difference. First operand 89 states and 173 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:49,966 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-06-05 20:30:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:30:49,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:49,968 INFO L225 Difference]: With dead ends: 150 [2021-06-05 20:30:49,968 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 20:30:49,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:30:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 20:30:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 91. [2021-06-05 20:30:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 177 transitions. [2021-06-05 20:30:49,991 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 177 transitions. Word has length 15 [2021-06-05 20:30:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:49,991 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 177 transitions. [2021-06-05 20:30:49,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 177 transitions. [2021-06-05 20:30:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:49,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:49,992 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:49,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 20:30:49,992 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash -462825168, now seen corresponding path program 1 times [2021-06-05 20:30:49,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:49,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111225839] [2021-06-05 20:30:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:50,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:50,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111225839] [2021-06-05 20:30:50,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111225839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:50,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621469216] [2021-06-05 20:30:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:50,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:50,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621469216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:50,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:50,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 20:30:50,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543589786] [2021-06-05 20:30:50,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:30:50,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:50,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:30:50,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:30:50,484 INFO L87 Difference]: Start difference. First operand 91 states and 177 transitions. Second operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:50,908 INFO L93 Difference]: Finished difference Result 227 states and 434 transitions. [2021-06-05 20:30:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 20:30:50,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:50,910 INFO L225 Difference]: With dead ends: 227 [2021-06-05 20:30:50,910 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 20:30:50,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 508.8ms TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2021-06-05 20:30:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 20:30:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 99. [2021-06-05 20:30:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.989795918367347) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 195 transitions. [2021-06-05 20:30:50,923 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 195 transitions. Word has length 18 [2021-06-05 20:30:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:50,924 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 195 transitions. [2021-06-05 20:30:50,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 195 transitions. [2021-06-05 20:30:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:50,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:50,928 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:51,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:51,152 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:51,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1320510406, now seen corresponding path program 2 times [2021-06-05 20:30:51,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:51,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447229499] [2021-06-05 20:30:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:51,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447229499] [2021-06-05 20:30:51,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447229499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:51,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093813016] [2021-06-05 20:30:51,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:51,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:51,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:51,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:51,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093813016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:51,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:51,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:30:51,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148543626] [2021-06-05 20:30:51,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:30:51,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:51,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:30:51,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:51,525 INFO L87 Difference]: Start difference. First operand 99 states and 195 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:52,038 INFO L93 Difference]: Finished difference Result 267 states and 507 transitions. [2021-06-05 20:30:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 20:30:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:52,043 INFO L225 Difference]: With dead ends: 267 [2021-06-05 20:30:52,043 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 20:30:52,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 511.3ms TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-06-05 20:30:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 20:30:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 106. [2021-06-05 20:30:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 105 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 211 transitions. [2021-06-05 20:30:52,059 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 211 transitions. Word has length 18 [2021-06-05 20:30:52,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:52,059 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 211 transitions. [2021-06-05 20:30:52,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 211 transitions. [2021-06-05 20:30:52,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:52,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:52,062 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:52,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:52,285 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1597566706, now seen corresponding path program 3 times [2021-06-05 20:30:52,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:52,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326699531] [2021-06-05 20:30:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:52,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:52,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326699531] [2021-06-05 20:30:52,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326699531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:52,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101911358] [2021-06-05 20:30:52,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:52,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:30:52,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:52,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101911358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:52,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:52,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:30:52,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788887625] [2021-06-05 20:30:52,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:30:52,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:52,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:30:52,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:52,646 INFO L87 Difference]: Start difference. First operand 106 states and 211 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:53,113 INFO L93 Difference]: Finished difference Result 271 states and 517 transitions. [2021-06-05 20:30:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:30:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:53,115 INFO L225 Difference]: With dead ends: 271 [2021-06-05 20:30:53,115 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 20:30:53,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2021-06-05 20:30:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 20:30:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 106. [2021-06-05 20:30:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 105 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 213 transitions. [2021-06-05 20:30:53,122 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 213 transitions. Word has length 18 [2021-06-05 20:30:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:53,122 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 213 transitions. [2021-06-05 20:30:53,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 213 transitions. [2021-06-05 20:30:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:53,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:53,123 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:53,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:53,333 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1977787446, now seen corresponding path program 4 times [2021-06-05 20:30:53,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:53,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694818326] [2021-06-05 20:30:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:53,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:53,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694818326] [2021-06-05 20:30:53,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694818326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:53,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167394296] [2021-06-05 20:30:53,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:53,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:30:53,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:53,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167394296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:53,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:53,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 20:30:53,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811561461] [2021-06-05 20:30:53,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:30:53,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:53,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:30:53,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:30:53,710 INFO L87 Difference]: Start difference. First operand 106 states and 213 transitions. Second operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:54,094 INFO L93 Difference]: Finished difference Result 243 states and 465 transitions. [2021-06-05 20:30:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 20:30:54,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:54,096 INFO L225 Difference]: With dead ends: 243 [2021-06-05 20:30:54,096 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 20:30:54,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2021-06-05 20:30:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 20:30:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 106. [2021-06-05 20:30:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0) internal successors, (210), 105 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 210 transitions. [2021-06-05 20:30:54,101 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 210 transitions. Word has length 18 [2021-06-05 20:30:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:54,101 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 210 transitions. [2021-06-05 20:30:54,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 210 transitions. [2021-06-05 20:30:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:54,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:54,102 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:54,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:54,313 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1473739747, now seen corresponding path program 1 times [2021-06-05 20:30:54,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:54,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572885990] [2021-06-05 20:30:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:54,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:54,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572885990] [2021-06-05 20:30:54,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572885990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:54,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115467245] [2021-06-05 20:30:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:54,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:54,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:54,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115467245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:54,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:54,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:30:54,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770012413] [2021-06-05 20:30:54,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:30:54,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:54,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:30:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:54,654 INFO L87 Difference]: Start difference. First operand 106 states and 210 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:54,921 INFO L93 Difference]: Finished difference Result 240 states and 461 transitions. [2021-06-05 20:30:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:30:54,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:54,923 INFO L225 Difference]: With dead ends: 240 [2021-06-05 20:30:54,923 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 20:30:54,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:30:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 20:30:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 109. [2021-06-05 20:30:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0) internal successors, (216), 108 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 216 transitions. [2021-06-05 20:30:54,928 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 216 transitions. Word has length 18 [2021-06-05 20:30:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:54,928 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 216 transitions. [2021-06-05 20:30:54,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 216 transitions. [2021-06-05 20:30:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:54,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:54,929 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:55,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:55,145 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2014221101, now seen corresponding path program 2 times [2021-06-05 20:30:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:55,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383472331] [2021-06-05 20:30:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:55,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:55,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383472331] [2021-06-05 20:30:55,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383472331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718645414] [2021-06-05 20:30:55,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:55,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:55,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:55,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:55,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:55,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718645414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:55,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:55,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:30:55,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316097917] [2021-06-05 20:30:55,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:30:55,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:55,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:30:55,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:55,475 INFO L87 Difference]: Start difference. First operand 109 states and 216 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:55,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:55,745 INFO L93 Difference]: Finished difference Result 253 states and 487 transitions. [2021-06-05 20:30:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:30:55,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:55,746 INFO L225 Difference]: With dead ends: 253 [2021-06-05 20:30:55,746 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 20:30:55,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:30:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 20:30:55,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 107. [2021-06-05 20:30:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0) internal successors, (212), 106 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 212 transitions. [2021-06-05 20:30:55,749 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 212 transitions. Word has length 18 [2021-06-05 20:30:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:55,750 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 212 transitions. [2021-06-05 20:30:55,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 212 transitions. [2021-06-05 20:30:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:55,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:55,750 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:55,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:55,957 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:55,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1805927793, now seen corresponding path program 3 times [2021-06-05 20:30:55,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:55,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633194493] [2021-06-05 20:30:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:56,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:56,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633194493] [2021-06-05 20:30:56,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633194493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:56,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114863967] [2021-06-05 20:30:56,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:56,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:30:56,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:56,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:56,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:56,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114863967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:56,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:56,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:30:56,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484295734] [2021-06-05 20:30:56,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:30:56,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:56,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:30:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:56,289 INFO L87 Difference]: Start difference. First operand 107 states and 212 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:56,539 INFO L93 Difference]: Finished difference Result 257 states and 498 transitions. [2021-06-05 20:30:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:30:56,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:56,541 INFO L225 Difference]: With dead ends: 257 [2021-06-05 20:30:56,541 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 20:30:56,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:30:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 20:30:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 110. [2021-06-05 20:30:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0) internal successors, (218), 109 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 218 transitions. [2021-06-05 20:30:56,545 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 218 transitions. Word has length 18 [2021-06-05 20:30:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:56,546 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 218 transitions. [2021-06-05 20:30:56,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 218 transitions. [2021-06-05 20:30:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:56,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:56,546 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:56,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 20:30:56,768 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2347625, now seen corresponding path program 4 times [2021-06-05 20:30:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:56,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047248398] [2021-06-05 20:30:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:56,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:56,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047248398] [2021-06-05 20:30:56,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047248398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:56,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607959944] [2021-06-05 20:30:56,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:56,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:30:56,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:56,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607959944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:57,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:57,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:30:57,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954962479] [2021-06-05 20:30:57,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:30:57,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:57,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:30:57,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:57,070 INFO L87 Difference]: Start difference. First operand 110 states and 218 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:57,489 INFO L93 Difference]: Finished difference Result 340 states and 656 transitions. [2021-06-05 20:30:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:30:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:57,491 INFO L225 Difference]: With dead ends: 340 [2021-06-05 20:30:57,491 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 20:30:57,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 429.8ms TimeCoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:30:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 20:30:57,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 118. [2021-06-05 20:30:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 117 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 237 transitions. [2021-06-05 20:30:57,497 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 237 transitions. Word has length 18 [2021-06-05 20:30:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:57,498 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 237 transitions. [2021-06-05 20:30:57,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:57,498 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 237 transitions. [2021-06-05 20:30:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:57,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:57,499 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:57,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 20:30:57,713 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash -45874853, now seen corresponding path program 5 times [2021-06-05 20:30:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:57,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555391468] [2021-06-05 20:30:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:57,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:57,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555391468] [2021-06-05 20:30:57,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555391468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:57,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091243151] [2021-06-05 20:30:57,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:57,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:57,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:57,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:57,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:58,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091243151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:58,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:58,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:30:58,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316143310] [2021-06-05 20:30:58,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:30:58,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:58,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:30:58,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:58,003 INFO L87 Difference]: Start difference. First operand 118 states and 237 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:58,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:58,324 INFO L93 Difference]: Finished difference Result 241 states and 465 transitions. [2021-06-05 20:30:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 20:30:58,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:58,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:58,325 INFO L225 Difference]: With dead ends: 241 [2021-06-05 20:30:58,326 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 20:30:58,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 354.4ms TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2021-06-05 20:30:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 20:30:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 115. [2021-06-05 20:30:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0) internal successors, (228), 114 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 228 transitions. [2021-06-05 20:30:58,333 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 228 transitions. Word has length 18 [2021-06-05 20:30:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:58,333 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 228 transitions. [2021-06-05 20:30:58,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 228 transitions. [2021-06-05 20:30:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:58,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:58,335 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:58,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:58,551 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:58,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1717172059, now seen corresponding path program 6 times [2021-06-05 20:30:58,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:58,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314272198] [2021-06-05 20:30:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:58,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:58,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314272198] [2021-06-05 20:30:58,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314272198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:58,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019167486] [2021-06-05 20:30:58,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:58,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:30:58,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:58,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:58,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:58,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019167486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:58,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:58,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:30:58,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322574615] [2021-06-05 20:30:58,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:30:58,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:58,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:30:58,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:58,838 INFO L87 Difference]: Start difference. First operand 115 states and 228 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:59,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:59,308 INFO L93 Difference]: Finished difference Result 358 states and 691 transitions. [2021-06-05 20:30:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:30:59,308 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:59,313 INFO L225 Difference]: With dead ends: 358 [2021-06-05 20:30:59,313 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 20:30:59,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 495.9ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:30:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 20:30:59,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 116. [2021-06-05 20:30:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0) internal successors, (230), 115 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 230 transitions. [2021-06-05 20:30:59,321 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 230 transitions. Word has length 18 [2021-06-05 20:30:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:59,321 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 230 transitions. [2021-06-05 20:30:59,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 230 transitions. [2021-06-05 20:30:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:59,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:59,322 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:59,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:59,545 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:59,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1920750141, now seen corresponding path program 7 times [2021-06-05 20:30:59,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:59,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938283894] [2021-06-05 20:30:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:59,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:59,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938283894] [2021-06-05 20:30:59,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938283894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572917830] [2021-06-05 20:30:59,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:59,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:30:59,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:59,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572917830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:59,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:59,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:30:59,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245980747] [2021-06-05 20:30:59,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:30:59,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:59,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:30:59,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:59,825 INFO L87 Difference]: Start difference. First operand 116 states and 230 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:00,104 INFO L93 Difference]: Finished difference Result 232 states and 437 transitions. [2021-06-05 20:31:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:00,106 INFO L225 Difference]: With dead ends: 232 [2021-06-05 20:31:00,106 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 20:31:00,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:31:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 20:31:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 118. [2021-06-05 20:31:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 117 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 233 transitions. [2021-06-05 20:31:00,110 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 233 transitions. Word has length 18 [2021-06-05 20:31:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:00,110 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 233 transitions. [2021-06-05 20:31:00,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 233 transitions. [2021-06-05 20:31:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:00,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:00,111 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:00,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 20:31:00,329 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:00,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1380268787, now seen corresponding path program 8 times [2021-06-05 20:31:00,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:00,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215585097] [2021-06-05 20:31:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:00,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:00,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215585097] [2021-06-05 20:31:00,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215585097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:00,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399748777] [2021-06-05 20:31:00,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:00,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:00,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:00,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:00,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399748777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:00,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:00,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:31:00,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758938448] [2021-06-05 20:31:00,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:00,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:00,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:00,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:00,654 INFO L87 Difference]: Start difference. First operand 118 states and 233 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:00,881 INFO L93 Difference]: Finished difference Result 245 states and 463 transitions. [2021-06-05 20:31:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:00,881 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:00,882 INFO L225 Difference]: With dead ends: 245 [2021-06-05 20:31:00,882 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 20:31:00,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:31:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 20:31:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 116. [2021-06-05 20:31:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 229 transitions. [2021-06-05 20:31:00,886 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 229 transitions. Word has length 18 [2021-06-05 20:31:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:00,887 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 229 transitions. [2021-06-05 20:31:00,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 229 transitions. [2021-06-05 20:31:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:00,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:00,887 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:01,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 20:31:01,088 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1588562095, now seen corresponding path program 9 times [2021-06-05 20:31:01,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:01,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960537284] [2021-06-05 20:31:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:01,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:01,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960537284] [2021-06-05 20:31:01,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960537284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261820511] [2021-06-05 20:31:01,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:01,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:31:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261820511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:01,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:01,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:31:01,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465837086] [2021-06-05 20:31:01,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:01,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:01,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:01,402 INFO L87 Difference]: Start difference. First operand 116 states and 229 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:01,680 INFO L93 Difference]: Finished difference Result 228 states and 435 transitions. [2021-06-05 20:31:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 20:31:01,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:01,681 INFO L225 Difference]: With dead ends: 228 [2021-06-05 20:31:01,681 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 20:31:01,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 356.5ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:31:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 20:31:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 117. [2021-06-05 20:31:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 229 transitions. [2021-06-05 20:31:01,685 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 229 transitions. Word has length 18 [2021-06-05 20:31:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:01,685 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 229 transitions. [2021-06-05 20:31:01,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 229 transitions. [2021-06-05 20:31:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:01,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:01,686 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:01,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 20:31:01,901 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:01,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:01,901 INFO L82 PathProgramCache]: Analyzing trace with hash -898129783, now seen corresponding path program 10 times [2021-06-05 20:31:01,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:01,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468145832] [2021-06-05 20:31:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:02,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:02,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468145832] [2021-06-05 20:31:02,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468145832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:02,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606845935] [2021-06-05 20:31:02,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:02,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:02,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:02,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606845935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:02,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:02,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:31:02,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686657247] [2021-06-05 20:31:02,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:02,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:02,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:02,181 INFO L87 Difference]: Start difference. First operand 117 states and 229 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:02,448 INFO L93 Difference]: Finished difference Result 273 states and 520 transitions. [2021-06-05 20:31:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 20:31:02,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:02,449 INFO L225 Difference]: With dead ends: 273 [2021-06-05 20:31:02,449 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 20:31:02,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-06-05 20:31:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 20:31:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 113. [2021-06-05 20:31:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 221 transitions. [2021-06-05 20:31:02,453 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 221 transitions. Word has length 18 [2021-06-05 20:31:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:02,454 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 221 transitions. [2021-06-05 20:31:02,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 221 transitions. [2021-06-05 20:31:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:02,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:02,454 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:02,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:02,665 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:02,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1410376780, now seen corresponding path program 5 times [2021-06-05 20:31:02,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:02,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803409293] [2021-06-05 20:31:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:02,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:02,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803409293] [2021-06-05 20:31:02,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803409293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:02,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115389534] [2021-06-05 20:31:02,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:02,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:02,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:02,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115389534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:02,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:02,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 20:31:02,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044426983] [2021-06-05 20:31:02,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:02,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:02,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:02,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:02,902 INFO L87 Difference]: Start difference. First operand 113 states and 221 transitions. Second operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:03,308 INFO L93 Difference]: Finished difference Result 305 states and 586 transitions. [2021-06-05 20:31:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 20:31:03,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:03,309 INFO L225 Difference]: With dead ends: 305 [2021-06-05 20:31:03,309 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 20:31:03,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:31:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 20:31:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 121. [2021-06-05 20:31:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.9833333333333334) internal successors, (238), 120 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 238 transitions. [2021-06-05 20:31:03,314 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 238 transitions. Word has length 18 [2021-06-05 20:31:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:03,314 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 238 transitions. [2021-06-05 20:31:03,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 238 transitions. [2021-06-05 20:31:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:03,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:03,314 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:03,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 20:31:03,536 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash 552691542, now seen corresponding path program 6 times [2021-06-05 20:31:03,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:03,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846505453] [2021-06-05 20:31:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:03,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:03,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846505453] [2021-06-05 20:31:03,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846505453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:03,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174826323] [2021-06-05 20:31:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:03,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:31:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:03,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:03,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:03,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174826323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:03,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:03,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:03,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573775541] [2021-06-05 20:31:03,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:03,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:03,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:03,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:03,804 INFO L87 Difference]: Start difference. First operand 121 states and 238 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:04,243 INFO L93 Difference]: Finished difference Result 343 states and 653 transitions. [2021-06-05 20:31:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:31:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:04,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:04,245 INFO L225 Difference]: With dead ends: 343 [2021-06-05 20:31:04,245 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 20:31:04,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 409.5ms TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-06-05 20:31:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 20:31:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 125. [2021-06-05 20:31:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 124 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 247 transitions. [2021-06-05 20:31:04,250 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 247 transitions. Word has length 18 [2021-06-05 20:31:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:04,250 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 247 transitions. [2021-06-05 20:31:04,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 247 transitions. [2021-06-05 20:31:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:04,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:04,251 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:04,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:04,465 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash 275635242, now seen corresponding path program 7 times [2021-06-05 20:31:04,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:04,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435753887] [2021-06-05 20:31:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:04,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:04,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435753887] [2021-06-05 20:31:04,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435753887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:04,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781463615] [2021-06-05 20:31:04,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:04,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781463615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:04,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:04,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:04,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701236100] [2021-06-05 20:31:04,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:04,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:04,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:04,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:04,713 INFO L87 Difference]: Start difference. First operand 125 states and 247 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:05,144 INFO L93 Difference]: Finished difference Result 333 states and 643 transitions. [2021-06-05 20:31:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:31:05,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:05,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:05,145 INFO L225 Difference]: With dead ends: 333 [2021-06-05 20:31:05,145 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 20:31:05,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 20:31:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 20:31:05,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 125. [2021-06-05 20:31:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 249 transitions. [2021-06-05 20:31:05,150 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 249 transitions. Word has length 18 [2021-06-05 20:31:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:05,150 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 249 transitions. [2021-06-05 20:31:05,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 249 transitions. [2021-06-05 20:31:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:05,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:05,150 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:05,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:05,372 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash -754384287, now seen corresponding path program 11 times [2021-06-05 20:31:05,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:05,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313367558] [2021-06-05 20:31:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:05,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:05,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313367558] [2021-06-05 20:31:05,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313367558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:05,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750506740] [2021-06-05 20:31:05,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:05,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:05,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:05,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:05,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:05,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750506740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:05,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:05,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:31:05,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141935453] [2021-06-05 20:31:05,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:05,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:05,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:05,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:05,627 INFO L87 Difference]: Start difference. First operand 125 states and 249 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:05,765 INFO L93 Difference]: Finished difference Result 204 states and 386 transitions. [2021-06-05 20:31:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:05,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:05,766 INFO L225 Difference]: With dead ends: 204 [2021-06-05 20:31:05,766 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 20:31:05,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:31:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 20:31:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 129. [2021-06-05 20:31:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.9921875) internal successors, (255), 128 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 255 transitions. [2021-06-05 20:31:05,770 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 255 transitions. Word has length 18 [2021-06-05 20:31:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:05,770 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 255 transitions. [2021-06-05 20:31:05,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 255 transitions. [2021-06-05 20:31:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:05,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:05,771 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:05,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 20:31:05,994 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:05,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1294865641, now seen corresponding path program 12 times [2021-06-05 20:31:05,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:05,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361478359] [2021-06-05 20:31:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:06,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:06,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361478359] [2021-06-05 20:31:06,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361478359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:06,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034542531] [2021-06-05 20:31:06,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:06,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:31:06,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:06,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:06,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034542531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:06,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:06,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 20:31:06,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426762132] [2021-06-05 20:31:06,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:06,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:06,257 INFO L87 Difference]: Start difference. First operand 129 states and 255 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:06,412 INFO L93 Difference]: Finished difference Result 194 states and 375 transitions. [2021-06-05 20:31:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:06,413 INFO L225 Difference]: With dead ends: 194 [2021-06-05 20:31:06,413 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 20:31:06,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:31:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 20:31:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2021-06-05 20:31:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.0) internal successors, (248), 124 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 248 transitions. [2021-06-05 20:31:06,416 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 248 transitions. Word has length 18 [2021-06-05 20:31:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:06,416 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 248 transitions. [2021-06-05 20:31:06,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 248 transitions. [2021-06-05 20:31:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:06,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:06,417 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:06,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:06,625 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:06,625 INFO L82 PathProgramCache]: Analyzing trace with hash -599686158, now seen corresponding path program 8 times [2021-06-05 20:31:06,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:06,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25109404] [2021-06-05 20:31:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:06,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:06,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25109404] [2021-06-05 20:31:06,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25109404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:06,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109210398] [2021-06-05 20:31:06,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:06,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:06,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:06,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:06,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109210398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:06,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:06,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 20:31:06,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310849517] [2021-06-05 20:31:06,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:31:06,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:06,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:31:06,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:31:06,858 INFO L87 Difference]: Start difference. First operand 125 states and 248 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:07,290 INFO L93 Difference]: Finished difference Result 229 states and 443 transitions. [2021-06-05 20:31:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 20:31:07,290 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:07,291 INFO L225 Difference]: With dead ends: 229 [2021-06-05 20:31:07,291 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 20:31:07,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-06-05 20:31:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 20:31:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 131. [2021-06-05 20:31:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.0153846153846153) internal successors, (262), 130 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 262 transitions. [2021-06-05 20:31:07,295 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 262 transitions. Word has length 18 [2021-06-05 20:31:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:07,295 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 262 transitions. [2021-06-05 20:31:07,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 262 transitions. [2021-06-05 20:31:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:07,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:07,296 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:07,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 20:31:07,497 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:07,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:07,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1457371396, now seen corresponding path program 9 times [2021-06-05 20:31:07,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:07,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385947806] [2021-06-05 20:31:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:07,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385947806] [2021-06-05 20:31:07,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385947806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600771228] [2021-06-05 20:31:07,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:07,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:31:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:07,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600771228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:07,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:07,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 20:31:07,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838387943] [2021-06-05 20:31:07,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:07,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:07,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:07,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:07,764 INFO L87 Difference]: Start difference. First operand 131 states and 262 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:08,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:08,123 INFO L93 Difference]: Finished difference Result 290 states and 558 transitions. [2021-06-05 20:31:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 20:31:08,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:08,124 INFO L225 Difference]: With dead ends: 290 [2021-06-05 20:31:08,124 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 20:31:08,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:31:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 20:31:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 138. [2021-06-05 20:31:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:08,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2021-06-05 20:31:08,128 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 18 [2021-06-05 20:31:08,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:08,129 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2021-06-05 20:31:08,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:08,129 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2021-06-05 20:31:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:08,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:08,129 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:08,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 20:31:08,352 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:08,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1734427696, now seen corresponding path program 10 times [2021-06-05 20:31:08,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:08,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894590397] [2021-06-05 20:31:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:08,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:08,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894590397] [2021-06-05 20:31:08,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894590397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:08,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959098992] [2021-06-05 20:31:08,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:08,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:08,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:08,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959098992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:08,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:08,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 20:31:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621051782] [2021-06-05 20:31:08,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:08,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:08,611 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:08,982 INFO L93 Difference]: Finished difference Result 292 states and 565 transitions. [2021-06-05 20:31:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 20:31:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:08,983 INFO L225 Difference]: With dead ends: 292 [2021-06-05 20:31:08,983 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 20:31:08,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:31:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 20:31:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 133. [2021-06-05 20:31:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 132 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 270 transitions. [2021-06-05 20:31:08,991 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 270 transitions. Word has length 18 [2021-06-05 20:31:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:08,991 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 270 transitions. [2021-06-05 20:31:08,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 270 transitions. [2021-06-05 20:31:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:08,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:08,991 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:09,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:09,205 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:09,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:09,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2114648436, now seen corresponding path program 11 times [2021-06-05 20:31:09,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:09,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11377131] [2021-06-05 20:31:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:09,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:09,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11377131] [2021-06-05 20:31:09,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11377131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:09,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908460105] [2021-06-05 20:31:09,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:09,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:09,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:09,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:09,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:09,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908460105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:09,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:09,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:09,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899593659] [2021-06-05 20:31:09,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:09,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:09,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:09,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:09,504 INFO L87 Difference]: Start difference. First operand 133 states and 270 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:09,824 INFO L93 Difference]: Finished difference Result 214 states and 415 transitions. [2021-06-05 20:31:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 20:31:09,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:09,825 INFO L225 Difference]: With dead ends: 214 [2021-06-05 20:31:09,825 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 20:31:09,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2021-06-05 20:31:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 20:31:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 130. [2021-06-05 20:31:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 261 transitions. [2021-06-05 20:31:09,827 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 261 transitions. Word has length 18 [2021-06-05 20:31:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:09,827 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 261 transitions. [2021-06-05 20:31:09,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 261 transitions. [2021-06-05 20:31:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:09,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:09,828 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:10,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 20:31:10,037 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1610600737, now seen corresponding path program 13 times [2021-06-05 20:31:10,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:10,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536577773] [2021-06-05 20:31:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:10,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:10,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536577773] [2021-06-05 20:31:10,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536577773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:10,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259870965] [2021-06-05 20:31:10,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 20:31:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:10,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:10,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:10,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259870965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:10,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:10,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 20:31:10,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98401749] [2021-06-05 20:31:10,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:10,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:10,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:10,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:10,286 INFO L87 Difference]: Start difference. First operand 130 states and 261 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:10,511 INFO L93 Difference]: Finished difference Result 190 states and 370 transitions. [2021-06-05 20:31:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:10,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:10,513 INFO L225 Difference]: With dead ends: 190 [2021-06-05 20:31:10,513 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 20:31:10,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:31:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 20:31:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 132. [2021-06-05 20:31:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.015267175572519) internal successors, (264), 131 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 264 transitions. [2021-06-05 20:31:10,516 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 264 transitions. Word has length 18 [2021-06-05 20:31:10,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:10,516 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 264 transitions. [2021-06-05 20:31:10,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 264 transitions. [2021-06-05 20:31:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:10,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:10,517 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:10,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:10,717 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:10,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2143885205, now seen corresponding path program 14 times [2021-06-05 20:31:10,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:10,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172379594] [2021-06-05 20:31:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:10,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:10,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172379594] [2021-06-05 20:31:10,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172379594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:10,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589634420] [2021-06-05 20:31:10,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:10,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:10,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:10,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:10,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:10,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589634420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:10,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:10,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 20:31:10,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903486799] [2021-06-05 20:31:10,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:10,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:10,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:10,978 INFO L87 Difference]: Start difference. First operand 132 states and 264 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:11,183 INFO L93 Difference]: Finished difference Result 203 states and 396 transitions. [2021-06-05 20:31:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:11,184 INFO L225 Difference]: With dead ends: 203 [2021-06-05 20:31:11,184 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 20:31:11,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:31:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 20:31:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 130. [2021-06-05 20:31:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.0155038759689923) internal successors, (260), 129 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 260 transitions. [2021-06-05 20:31:11,187 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 260 transitions. Word has length 18 [2021-06-05 20:31:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:11,187 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 260 transitions. [2021-06-05 20:31:11,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 260 transitions. [2021-06-05 20:31:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:11,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:11,187 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:11,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 20:31:11,393 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1942788783, now seen corresponding path program 15 times [2021-06-05 20:31:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:11,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112222882] [2021-06-05 20:31:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:11,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:11,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112222882] [2021-06-05 20:31:11,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112222882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:11,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900066182] [2021-06-05 20:31:11,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:11,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:31:11,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:11,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:11,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900066182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:11,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:11,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 20:31:11,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997958289] [2021-06-05 20:31:11,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:11,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:11,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:11,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:11,630 INFO L87 Difference]: Start difference. First operand 130 states and 260 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:11,872 INFO L93 Difference]: Finished difference Result 207 states and 407 transitions. [2021-06-05 20:31:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:11,873 INFO L225 Difference]: With dead ends: 207 [2021-06-05 20:31:11,873 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 20:31:11,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:31:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 20:31:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 133. [2021-06-05 20:31:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.015151515151515) internal successors, (266), 132 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 266 transitions. [2021-06-05 20:31:11,878 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 266 transitions. Word has length 18 [2021-06-05 20:31:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:11,878 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 266 transitions. [2021-06-05 20:31:11,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 266 transitions. [2021-06-05 20:31:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:11,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:11,878 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:12,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 20:31:12,097 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash -134513365, now seen corresponding path program 16 times [2021-06-05 20:31:12,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:12,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533626523] [2021-06-05 20:31:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:12,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:12,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533626523] [2021-06-05 20:31:12,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533626523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:12,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827559] [2021-06-05 20:31:12,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:12,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:12,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:12,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:12,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:12,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:12,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 20:31:12,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434879266] [2021-06-05 20:31:12,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:12,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:12,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:12,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:12,337 INFO L87 Difference]: Start difference. First operand 133 states and 266 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:12,557 INFO L93 Difference]: Finished difference Result 234 states and 457 transitions. [2021-06-05 20:31:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 20:31:12,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:12,558 INFO L225 Difference]: With dead ends: 234 [2021-06-05 20:31:12,558 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 20:31:12,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-05 20:31:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 20:31:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 131. [2021-06-05 20:31:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.023076923076923) internal successors, (263), 130 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 263 transitions. [2021-06-05 20:31:12,562 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 263 transitions. Word has length 18 [2021-06-05 20:31:12,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:12,562 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 263 transitions. [2021-06-05 20:31:12,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:12,562 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 263 transitions. [2021-06-05 20:31:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:12,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:12,562 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:12,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:12,781 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash -182735843, now seen corresponding path program 17 times [2021-06-05 20:31:12,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:12,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136336453] [2021-06-05 20:31:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:12,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:12,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136336453] [2021-06-05 20:31:12,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136336453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:12,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899633013] [2021-06-05 20:31:12,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:12,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:12,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:13,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899633013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:13,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:13,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 20:31:13,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285772173] [2021-06-05 20:31:13,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:13,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:13,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:13,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:13,031 INFO L87 Difference]: Start difference. First operand 131 states and 263 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:13,267 INFO L93 Difference]: Finished difference Result 214 states and 419 transitions. [2021-06-05 20:31:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:13,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:13,268 INFO L225 Difference]: With dead ends: 214 [2021-06-05 20:31:13,268 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 20:31:13,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:31:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 20:31:13,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 128. [2021-06-05 20:31:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.0) internal successors, (254), 127 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 254 transitions. [2021-06-05 20:31:13,271 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 254 transitions. Word has length 18 [2021-06-05 20:31:13,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:13,271 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 254 transitions. [2021-06-05 20:31:13,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 254 transitions. [2021-06-05 20:31:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:13,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:13,271 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:13,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:13,473 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1580311069, now seen corresponding path program 18 times [2021-06-05 20:31:13,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:13,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626748768] [2021-06-05 20:31:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:13,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:13,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626748768] [2021-06-05 20:31:13,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626748768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:13,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704563475] [2021-06-05 20:31:13,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:13,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:31:13,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:13,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:13,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704563475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:13,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:13,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 20:31:13,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252602763] [2021-06-05 20:31:13,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:13,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:13,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:13,721 INFO L87 Difference]: Start difference. First operand 128 states and 254 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:13,982 INFO L93 Difference]: Finished difference Result 268 states and 524 transitions. [2021-06-05 20:31:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 20:31:13,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:13,983 INFO L225 Difference]: With dead ends: 268 [2021-06-05 20:31:13,983 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 20:31:13,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-06-05 20:31:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 20:31:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 124. [2021-06-05 20:31:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.0) internal successors, (246), 123 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 246 transitions. [2021-06-05 20:31:13,987 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 246 transitions. Word has length 18 [2021-06-05 20:31:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:13,987 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 246 transitions. [2021-06-05 20:31:13,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 246 transitions. [2021-06-05 20:31:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:13,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:13,988 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:14,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 20:31:14,201 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:14,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1356878712, now seen corresponding path program 12 times [2021-06-05 20:31:14,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:14,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366228478] [2021-06-05 20:31:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:14,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:14,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366228478] [2021-06-05 20:31:14,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366228478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:14,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186451357] [2021-06-05 20:31:14,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:14,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:31:14,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:14,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:14,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186451357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:14,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:14,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:14,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847105065] [2021-06-05 20:31:14,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:14,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:14,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:14,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:14,487 INFO L87 Difference]: Start difference. First operand 124 states and 246 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:14,787 INFO L93 Difference]: Finished difference Result 220 states and 426 transitions. [2021-06-05 20:31:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 20:31:14,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:14,788 INFO L225 Difference]: With dead ends: 220 [2021-06-05 20:31:14,788 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 20:31:14,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:31:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 20:31:14,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 130. [2021-06-05 20:31:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.0155038759689923) internal successors, (260), 129 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 260 transitions. [2021-06-05 20:31:14,792 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 260 transitions. Word has length 18 [2021-06-05 20:31:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:14,792 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 260 transitions. [2021-06-05 20:31:14,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 260 transitions. [2021-06-05 20:31:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:14,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:14,793 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:14,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:14,997 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1079822412, now seen corresponding path program 13 times [2021-06-05 20:31:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:14,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176850415] [2021-06-05 20:31:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:15,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:15,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176850415] [2021-06-05 20:31:15,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176850415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:15,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985995470] [2021-06-05 20:31:15,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:15,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:15,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985995470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:15,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:15,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:15,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549758202] [2021-06-05 20:31:15,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:15,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:15,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:15,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:15,293 INFO L87 Difference]: Start difference. First operand 130 states and 260 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:15,665 INFO L93 Difference]: Finished difference Result 275 states and 534 transitions. [2021-06-05 20:31:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 20:31:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:15,666 INFO L225 Difference]: With dead ends: 275 [2021-06-05 20:31:15,666 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 20:31:15,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-06-05 20:31:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 20:31:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 129. [2021-06-05 20:31:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.0390625) internal successors, (261), 128 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 261 transitions. [2021-06-05 20:31:15,669 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 261 transitions. Word has length 18 [2021-06-05 20:31:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:15,669 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 261 transitions. [2021-06-05 20:31:15,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 261 transitions. [2021-06-05 20:31:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:15,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:15,670 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:15,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 20:31:15,892 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:15,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash -799449024, now seen corresponding path program 14 times [2021-06-05 20:31:15,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:15,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613744666] [2021-06-05 20:31:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:15,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:15,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613744666] [2021-06-05 20:31:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613744666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:15,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183522686] [2021-06-05 20:31:15,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:16,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:16,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:16,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183522686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:16,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:16,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:16,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279563644] [2021-06-05 20:31:16,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:16,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:16,142 INFO L87 Difference]: Start difference. First operand 129 states and 261 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:16,467 INFO L93 Difference]: Finished difference Result 209 states and 408 transitions. [2021-06-05 20:31:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 20:31:16,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:16,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:16,468 INFO L225 Difference]: With dead ends: 209 [2021-06-05 20:31:16,468 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 20:31:16,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2021-06-05 20:31:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 20:31:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2021-06-05 20:31:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.015873015873016) internal successors, (254), 126 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 254 transitions. [2021-06-05 20:31:16,471 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 254 transitions. Word has length 18 [2021-06-05 20:31:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:16,471 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 254 transitions. [2021-06-05 20:31:16,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 254 transitions. [2021-06-05 20:31:16,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:16,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:16,471 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:16,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 20:31:16,672 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1667825169, now seen corresponding path program 19 times [2021-06-05 20:31:16,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:16,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93087526] [2021-06-05 20:31:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:16,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:16,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93087526] [2021-06-05 20:31:16,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93087526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:16,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391561773] [2021-06-05 20:31:16,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:16,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:16,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391561773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:16,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:16,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 20:31:16,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151401766] [2021-06-05 20:31:16,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:16,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:16,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:16,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:16,901 INFO L87 Difference]: Start difference. First operand 127 states and 254 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:17,128 INFO L93 Difference]: Finished difference Result 196 states and 384 transitions. [2021-06-05 20:31:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:17,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:17,129 INFO L225 Difference]: With dead ends: 196 [2021-06-05 20:31:17,129 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 20:31:17,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:31:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 20:31:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 132. [2021-06-05 20:31:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.015267175572519) internal successors, (264), 131 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 264 transitions. [2021-06-05 20:31:17,131 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 264 transitions. Word has length 18 [2021-06-05 20:31:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:17,131 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 264 transitions. [2021-06-05 20:31:17,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 264 transitions. [2021-06-05 20:31:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:17,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:17,132 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:17,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 20:31:17,354 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:17,354 INFO L82 PathProgramCache]: Analyzing trace with hash 140450249, now seen corresponding path program 20 times [2021-06-05 20:31:17,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:17,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15364640] [2021-06-05 20:31:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:17,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:17,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15364640] [2021-06-05 20:31:17,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15364640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:17,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539016632] [2021-06-05 20:31:17,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:17,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:17,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:17,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:17,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539016632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:17,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:17,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 20:31:17,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111013082] [2021-06-05 20:31:17,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:17,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:17,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:17,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:17,611 INFO L87 Difference]: Start difference. First operand 132 states and 264 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:17,853 INFO L93 Difference]: Finished difference Result 217 states and 422 transitions. [2021-06-05 20:31:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:31:17,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:17,854 INFO L225 Difference]: With dead ends: 217 [2021-06-05 20:31:17,854 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 20:31:17,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:31:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 20:31:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 129. [2021-06-05 20:31:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.015625) internal successors, (258), 128 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 258 transitions. [2021-06-05 20:31:17,857 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 258 transitions. Word has length 18 [2021-06-05 20:31:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:17,857 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 258 transitions. [2021-06-05 20:31:17,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 258 transitions. [2021-06-05 20:31:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:17,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:17,857 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:18,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 20:31:18,078 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash 95221743, now seen corresponding path program 21 times [2021-06-05 20:31:18,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:18,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610706887] [2021-06-05 20:31:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:18,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:18,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610706887] [2021-06-05 20:31:18,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610706887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:18,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877233199] [2021-06-05 20:31:18,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:18,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:31:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:18,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:18,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:18,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877233199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:18,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:18,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 20:31:18,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720837533] [2021-06-05 20:31:18,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:18,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:18,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:18,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:18,338 INFO L87 Difference]: Start difference. First operand 129 states and 258 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:18,587 INFO L93 Difference]: Finished difference Result 232 states and 452 transitions. [2021-06-05 20:31:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 20:31:18,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:18,588 INFO L225 Difference]: With dead ends: 232 [2021-06-05 20:31:18,588 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 20:31:18,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-05 20:31:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 20:31:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 126. [2021-06-05 20:31:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.016) internal successors, (252), 125 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 252 transitions. [2021-06-05 20:31:18,591 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 252 transitions. Word has length 18 [2021-06-05 20:31:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:18,591 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 252 transitions. [2021-06-05 20:31:18,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 252 transitions. [2021-06-05 20:31:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:18,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:18,592 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:18,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 20:31:18,813 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:18,814 INFO L82 PathProgramCache]: Analyzing trace with hash -813995470, now seen corresponding path program 15 times [2021-06-05 20:31:18,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:18,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998373573] [2021-06-05 20:31:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:18,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:18,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998373573] [2021-06-05 20:31:18,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998373573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:18,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124469336] [2021-06-05 20:31:18,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:18,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:31:18,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:19,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124469336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:19,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:19,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:19,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082518036] [2021-06-05 20:31:19,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:19,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:19,056 INFO L87 Difference]: Start difference. First operand 126 states and 252 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:19,340 INFO L93 Difference]: Finished difference Result 205 states and 398 transitions. [2021-06-05 20:31:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 20:31:19,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:19,341 INFO L225 Difference]: With dead ends: 205 [2021-06-05 20:31:19,341 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 20:31:19,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-06-05 20:31:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 20:31:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 127. [2021-06-05 20:31:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 126 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 255 transitions. [2021-06-05 20:31:19,343 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 255 transitions. Word has length 18 [2021-06-05 20:31:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:19,343 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 255 transitions. [2021-06-05 20:31:19,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 255 transitions. [2021-06-05 20:31:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:19,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:19,344 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:19,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 20:31:19,549 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:19,549 INFO L82 PathProgramCache]: Analyzing trace with hash -299723410, now seen corresponding path program 16 times [2021-06-05 20:31:19,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:19,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712875482] [2021-06-05 20:31:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:19,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:19,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712875482] [2021-06-05 20:31:19,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712875482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:19,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904386363] [2021-06-05 20:31:19,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:19,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:19,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:19,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:19,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:19,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904386363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:19,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:19,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:19,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283155281] [2021-06-05 20:31:19,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:19,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:19,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:19,809 INFO L87 Difference]: Start difference. First operand 127 states and 255 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:20,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:20,035 INFO L93 Difference]: Finished difference Result 191 states and 369 transitions. [2021-06-05 20:31:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 20:31:20,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:20,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:20,035 INFO L225 Difference]: With dead ends: 191 [2021-06-05 20:31:20,036 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 20:31:20,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-06-05 20:31:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 20:31:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2021-06-05 20:31:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.0) internal successors, (246), 123 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 246 transitions. [2021-06-05 20:31:20,038 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 246 transitions. Word has length 18 [2021-06-05 20:31:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:20,038 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 246 transitions. [2021-06-05 20:31:20,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 246 transitions. [2021-06-05 20:31:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:20,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:20,038 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:20,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 20:31:20,239 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash 207189513, now seen corresponding path program 22 times [2021-06-05 20:31:20,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:20,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823771424] [2021-06-05 20:31:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:20,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823771424] [2021-06-05 20:31:20,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823771424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355066293] [2021-06-05 20:31:20,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:20,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:20,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:20,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:20,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:20,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355066293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:20,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:20,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 20:31:20,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643417515] [2021-06-05 20:31:20,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:31:20,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:20,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:31:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:31:20,462 INFO L87 Difference]: Start difference. First operand 124 states and 246 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:20,767 INFO L93 Difference]: Finished difference Result 271 states and 525 transitions. [2021-06-05 20:31:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 20:31:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:20,768 INFO L225 Difference]: With dead ends: 271 [2021-06-05 20:31:20,768 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 20:31:20,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-06-05 20:31:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 20:31:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 126. [2021-06-05 20:31:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.008) internal successors, (251), 125 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 251 transitions. [2021-06-05 20:31:20,774 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 251 transitions. Word has length 18 [2021-06-05 20:31:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:20,774 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 251 transitions. [2021-06-05 20:31:20,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 251 transitions. [2021-06-05 20:31:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:31:20,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:20,774 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:20,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:20,987 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:20,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:20,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1931489138, now seen corresponding path program 17 times [2021-06-05 20:31:20,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:20,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605256962] [2021-06-05 20:31:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:21,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605256962] [2021-06-05 20:31:21,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605256962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473976356] [2021-06-05 20:31:21,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:21,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:21,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 20:31:21,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:21,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473976356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:21,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:21,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:21,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007594654] [2021-06-05 20:31:21,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:31:21,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:21,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:31:21,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:21,262 INFO L87 Difference]: Start difference. First operand 126 states and 251 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:21,525 INFO L93 Difference]: Finished difference Result 186 states and 359 transitions. [2021-06-05 20:31:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 20:31:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:31:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:21,526 INFO L225 Difference]: With dead ends: 186 [2021-06-05 20:31:21,526 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 20:31:21,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 374.5ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 20:31:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 20:31:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 126. [2021-06-05 20:31:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.0) internal successors, (250), 125 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 250 transitions. [2021-06-05 20:31:21,528 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 250 transitions. Word has length 18 [2021-06-05 20:31:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:21,528 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 250 transitions. [2021-06-05 20:31:21,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 250 transitions. [2021-06-05 20:31:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:21,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:21,529 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:21,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:21,729 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:21,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:21,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1089764798, now seen corresponding path program 18 times [2021-06-05 20:31:21,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:21,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261942042] [2021-06-05 20:31:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:21,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:21,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261942042] [2021-06-05 20:31:21,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261942042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:21,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482755098] [2021-06-05 20:31:21,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:21,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:31:21,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:31:21,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:22,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482755098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:22,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:22,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 20:31:22,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111684064] [2021-06-05 20:31:22,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:31:22,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:31:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:31:22,131 INFO L87 Difference]: Start difference. First operand 126 states and 250 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:22,695 INFO L93 Difference]: Finished difference Result 322 states and 625 transitions. [2021-06-05 20:31:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:31:22,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:22,697 INFO L225 Difference]: With dead ends: 322 [2021-06-05 20:31:22,697 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 20:31:22,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 628.4ms TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:31:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 20:31:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 136. [2021-06-05 20:31:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0148148148148146) internal successors, (272), 135 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 272 transitions. [2021-06-05 20:31:22,701 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 272 transitions. Word has length 21 [2021-06-05 20:31:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:22,701 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 272 transitions. [2021-06-05 20:31:22,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 272 transitions. [2021-06-05 20:31:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:22,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:22,701 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:22,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:22,917 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1947450036, now seen corresponding path program 19 times [2021-06-05 20:31:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:22,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030785622] [2021-06-05 20:31:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:23,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:23,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030785622] [2021-06-05 20:31:23,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030785622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:23,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610808695] [2021-06-05 20:31:23,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:31:23,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:23,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610808695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:23,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:23,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 20:31:23,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250887665] [2021-06-05 20:31:23,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:31:23,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:23,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:31:23,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:31:23,257 INFO L87 Difference]: Start difference. First operand 136 states and 272 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:23,704 INFO L93 Difference]: Finished difference Result 368 states and 711 transitions. [2021-06-05 20:31:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:31:23,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:23,705 INFO L225 Difference]: With dead ends: 368 [2021-06-05 20:31:23,706 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 20:31:23,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 501.6ms TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:31:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 20:31:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 140. [2021-06-05 20:31:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 281 transitions. [2021-06-05 20:31:23,710 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 281 transitions. Word has length 21 [2021-06-05 20:31:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:23,710 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 281 transitions. [2021-06-05 20:31:23,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 281 transitions. [2021-06-05 20:31:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:23,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:23,711 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:23,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 20:31:23,917 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2070460960, now seen corresponding path program 20 times [2021-06-05 20:31:23,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:23,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102496537] [2021-06-05 20:31:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:24,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:24,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102496537] [2021-06-05 20:31:24,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102496537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:24,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210490418] [2021-06-05 20:31:24,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:24,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:24,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:24,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:31:24,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:24,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210490418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:24,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:24,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 20:31:24,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418789994] [2021-06-05 20:31:24,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:31:24,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:31:24,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:31:24,264 INFO L87 Difference]: Start difference. First operand 140 states and 281 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:24,820 INFO L93 Difference]: Finished difference Result 358 states and 701 transitions. [2021-06-05 20:31:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:31:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:24,822 INFO L225 Difference]: With dead ends: 358 [2021-06-05 20:31:24,822 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 20:31:24,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 585.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 20:31:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 20:31:24,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 132. [2021-06-05 20:31:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 131 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 263 transitions. [2021-06-05 20:31:24,825 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 263 transitions. Word has length 21 [2021-06-05 20:31:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:24,825 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 263 transitions. [2021-06-05 20:31:24,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 263 transitions. [2021-06-05 20:31:24,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:24,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:24,826 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:25,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:25,029 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash -448399340, now seen corresponding path program 21 times [2021-06-05 20:31:25,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:25,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540550528] [2021-06-05 20:31:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:25,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:25,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540550528] [2021-06-05 20:31:25,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540550528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:25,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74546776] [2021-06-05 20:31:25,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 20:31:25,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:31:25,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:25,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:25,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:25,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74546776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:25,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:25,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 20:31:25,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127258752] [2021-06-05 20:31:25,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:31:25,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:31:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:31:25,389 INFO L87 Difference]: Start difference. First operand 132 states and 263 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:25,791 INFO L93 Difference]: Finished difference Result 321 states and 622 transitions. [2021-06-05 20:31:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 20:31:25,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:25,792 INFO L225 Difference]: With dead ends: 321 [2021-06-05 20:31:25,792 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 20:31:25,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 20:31:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 142. [2021-06-05 20:31:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.021276595744681) internal successors, (285), 141 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 285 transitions. [2021-06-05 20:31:25,796 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 285 transitions. Word has length 21 [2021-06-05 20:31:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:25,796 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 285 transitions. [2021-06-05 20:31:25,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 285 transitions. [2021-06-05 20:31:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:25,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:25,796 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:26,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:26,001 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:26,001 INFO L82 PathProgramCache]: Analyzing trace with hash -725455640, now seen corresponding path program 22 times [2021-06-05 20:31:26,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:26,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413809111] [2021-06-05 20:31:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:26,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:26,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413809111] [2021-06-05 20:31:26,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413809111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:26,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764564472] [2021-06-05 20:31:26,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:26,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:26,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:26,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:31:26,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:26,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764564472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:26,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:26,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 20:31:26,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599382053] [2021-06-05 20:31:26,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:31:26,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:31:26,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:31:26,341 INFO L87 Difference]: Start difference. First operand 142 states and 285 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:26,941 INFO L93 Difference]: Finished difference Result 351 states and 681 transitions. [2021-06-05 20:31:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:31:26,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:26,942 INFO L225 Difference]: With dead ends: 351 [2021-06-05 20:31:26,942 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 20:31:26,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 624.7ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 20:31:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 20:31:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 141. [2021-06-05 20:31:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.0142857142857142) internal successors, (282), 140 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 282 transitions. [2021-06-05 20:31:26,945 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 282 transitions. Word has length 21 [2021-06-05 20:31:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:26,946 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 282 transitions. [2021-06-05 20:31:26,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 282 transitions. [2021-06-05 20:31:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:26,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:26,946 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:27,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 20:31:27,153 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1175968160, now seen corresponding path program 23 times [2021-06-05 20:31:27,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:27,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313654355] [2021-06-05 20:31:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:27,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:27,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313654355] [2021-06-05 20:31:27,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313654355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:27,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515361408] [2021-06-05 20:31:27,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:27,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:31:27,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:27,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:31:27,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515361408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:27,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:27,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 20:31:27,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735066334] [2021-06-05 20:31:27,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:31:27,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:27,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:31:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:31:27,514 INFO L87 Difference]: Start difference. First operand 141 states and 282 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:28,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:28,035 INFO L93 Difference]: Finished difference Result 324 states and 637 transitions. [2021-06-05 20:31:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:31:28,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:28,037 INFO L225 Difference]: With dead ends: 324 [2021-06-05 20:31:28,037 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 20:31:28,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 570.4ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 20:31:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 20:31:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 144. [2021-06-05 20:31:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.027972027972028) internal successors, (290), 143 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 290 transitions. [2021-06-05 20:31:28,040 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 290 transitions. Word has length 21 [2021-06-05 20:31:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:28,040 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 290 transitions. [2021-06-05 20:31:28,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 290 transitions. [2021-06-05 20:31:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:28,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:28,040 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:28,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 20:31:28,241 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:28,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2100679377, now seen corresponding path program 1 times [2021-06-05 20:31:28,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:28,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150213823] [2021-06-05 20:31:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:28,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:28,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150213823] [2021-06-05 20:31:28,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150213823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:28,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726168721] [2021-06-05 20:31:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:28,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:28,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:28,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726168721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:28,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:28,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:28,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501050563] [2021-06-05 20:31:28,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:28,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:28,867 INFO L87 Difference]: Start difference. First operand 144 states and 290 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:29,873 INFO L93 Difference]: Finished difference Result 343 states and 667 transitions. [2021-06-05 20:31:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:31:29,873 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:29,874 INFO L225 Difference]: With dead ends: 343 [2021-06-05 20:31:29,874 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 20:31:29,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1129.5ms TimeCoverageRelationStatistics Valid=400, Invalid=2356, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:31:29,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 20:31:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 157. [2021-06-05 20:31:29,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9871794871794872) internal successors, (310), 156 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 310 transitions. [2021-06-05 20:31:29,878 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 310 transitions. Word has length 21 [2021-06-05 20:31:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:29,878 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 310 transitions. [2021-06-05 20:31:29,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 310 transitions. [2021-06-05 20:31:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:29,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:29,879 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:30,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 20:31:30,085 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1653806565, now seen corresponding path program 2 times [2021-06-05 20:31:30,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:30,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048104747] [2021-06-05 20:31:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:30,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:30,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048104747] [2021-06-05 20:31:30,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048104747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:30,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220122842] [2021-06-05 20:31:30,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:30,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:30,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:30,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:30,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:30,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220122842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:30,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:30,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:30,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491692453] [2021-06-05 20:31:30,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:30,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:30,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:30,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:30,726 INFO L87 Difference]: Start difference. First operand 157 states and 310 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:31,696 INFO L93 Difference]: Finished difference Result 358 states and 688 transitions. [2021-06-05 20:31:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:31:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:31,697 INFO L225 Difference]: With dead ends: 358 [2021-06-05 20:31:31,697 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 20:31:31,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1172.9ms TimeCoverageRelationStatistics Valid=369, Invalid=2387, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:31:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 20:31:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 159. [2021-06-05 20:31:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.9873417721518987) internal successors, (314), 158 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 314 transitions. [2021-06-05 20:31:31,702 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 314 transitions. Word has length 21 [2021-06-05 20:31:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:31,702 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 314 transitions. [2021-06-05 20:31:31,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 314 transitions. [2021-06-05 20:31:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:31,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:31,702 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:31,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:31,917 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1498251119, now seen corresponding path program 3 times [2021-06-05 20:31:31,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:31,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460575178] [2021-06-05 20:31:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:32,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:32,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460575178] [2021-06-05 20:31:32,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460575178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:32,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072739064] [2021-06-05 20:31:32,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:32,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:31:32,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:32,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:32,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:32,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072739064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:32,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:32,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:32,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979767987] [2021-06-05 20:31:32,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:32,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:32,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:32,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:32,535 INFO L87 Difference]: Start difference. First operand 159 states and 314 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:33,580 INFO L93 Difference]: Finished difference Result 356 states and 686 transitions. [2021-06-05 20:31:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:31:33,580 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:33,581 INFO L225 Difference]: With dead ends: 356 [2021-06-05 20:31:33,582 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 20:31:33,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1144.8ms TimeCoverageRelationStatistics Valid=373, Invalid=2383, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:31:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 20:31:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 161. [2021-06-05 20:31:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.9875) internal successors, (318), 160 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 318 transitions. [2021-06-05 20:31:33,585 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 318 transitions. Word has length 21 [2021-06-05 20:31:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:33,585 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 318 transitions. [2021-06-05 20:31:33,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 318 transitions. [2021-06-05 20:31:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:33,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:33,585 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:33,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:33,797 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash -606076413, now seen corresponding path program 4 times [2021-06-05 20:31:33,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:33,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960232668] [2021-06-05 20:31:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:34,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:34,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960232668] [2021-06-05 20:31:34,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960232668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:34,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635104734] [2021-06-05 20:31:34,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:34,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:34,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:34,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:34,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:34,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635104734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:34,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:34,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:34,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756530677] [2021-06-05 20:31:34,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:34,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:34,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:34,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:34,414 INFO L87 Difference]: Start difference. First operand 161 states and 318 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:35,407 INFO L93 Difference]: Finished difference Result 354 states and 684 transitions. [2021-06-05 20:31:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:31:35,407 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:35,408 INFO L225 Difference]: With dead ends: 354 [2021-06-05 20:31:35,408 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 20:31:35,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1129.0ms TimeCoverageRelationStatistics Valid=372, Invalid=2384, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:31:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 20:31:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 163. [2021-06-05 20:31:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.9876543209876543) internal successors, (322), 162 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 322 transitions. [2021-06-05 20:31:35,412 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 322 transitions. Word has length 21 [2021-06-05 20:31:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:35,412 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 322 transitions. [2021-06-05 20:31:35,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 322 transitions. [2021-06-05 20:31:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:35,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:35,412 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:35,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:35,629 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1833208319, now seen corresponding path program 5 times [2021-06-05 20:31:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:35,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624077938] [2021-06-05 20:31:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:35,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:35,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624077938] [2021-06-05 20:31:35,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624077938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:35,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349898513] [2021-06-05 20:31:35,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:35,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:35,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:35,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:35,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:36,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349898513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:36,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:36,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:36,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129579757] [2021-06-05 20:31:36,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:36,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:36,266 INFO L87 Difference]: Start difference. First operand 163 states and 322 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:37,580 INFO L93 Difference]: Finished difference Result 389 states and 737 transitions. [2021-06-05 20:31:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:31:37,581 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:37,581 INFO L225 Difference]: With dead ends: 389 [2021-06-05 20:31:37,582 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 20:31:37,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1438.6ms TimeCoverageRelationStatistics Valid=522, Invalid=3018, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:31:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 20:31:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 173. [2021-06-05 20:31:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.011627906976744) internal successors, (346), 172 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 346 transitions. [2021-06-05 20:31:37,586 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 346 transitions. Word has length 21 [2021-06-05 20:31:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:37,586 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 346 transitions. [2021-06-05 20:31:37,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 346 transitions. [2021-06-05 20:31:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:37,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:37,587 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:37,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:37,801 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1825885499, now seen corresponding path program 6 times [2021-06-05 20:31:37,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:37,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746994469] [2021-06-05 20:31:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:38,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746994469] [2021-06-05 20:31:38,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746994469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942317903] [2021-06-05 20:31:38,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:38,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:31:38,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:38,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:38,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:38,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942317903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:38,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:38,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:38,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737418340] [2021-06-05 20:31:38,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:38,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:38,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:38,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:38,438 INFO L87 Difference]: Start difference. First operand 173 states and 346 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:39,766 INFO L93 Difference]: Finished difference Result 389 states and 748 transitions. [2021-06-05 20:31:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:31:39,767 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:39,768 INFO L225 Difference]: With dead ends: 389 [2021-06-05 20:31:39,768 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 20:31:39,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1363.0ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:31:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 20:31:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 171. [2021-06-05 20:31:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.988235294117647) internal successors, (338), 170 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 338 transitions. [2021-06-05 20:31:39,771 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 338 transitions. Word has length 21 [2021-06-05 20:31:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:39,771 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 338 transitions. [2021-06-05 20:31:39,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 338 transitions. [2021-06-05 20:31:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:39,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:39,772 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:39,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 20:31:39,981 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1862099873, now seen corresponding path program 7 times [2021-06-05 20:31:39,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:39,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418028186] [2021-06-05 20:31:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:40,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:40,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418028186] [2021-06-05 20:31:40,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418028186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:40,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593713581] [2021-06-05 20:31:40,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:40,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:40,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:40,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593713581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:40,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:40,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:40,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946904646] [2021-06-05 20:31:40,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:40,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:40,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:40,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:40,603 INFO L87 Difference]: Start difference. First operand 171 states and 338 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:41,381 INFO L93 Difference]: Finished difference Result 369 states and 717 transitions. [2021-06-05 20:31:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:31:41,382 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:41,383 INFO L225 Difference]: With dead ends: 369 [2021-06-05 20:31:41,383 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 20:31:41,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 904.4ms TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:31:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 20:31:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 176. [2021-06-05 20:31:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.9885714285714287) internal successors, (348), 175 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:41,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 348 transitions. [2021-06-05 20:31:41,386 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 348 transitions. Word has length 21 [2021-06-05 20:31:41,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:41,387 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 348 transitions. [2021-06-05 20:31:41,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:41,387 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 348 transitions. [2021-06-05 20:31:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:41,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:41,387 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:41,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:41,597 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:41,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:41,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1289957811, now seen corresponding path program 8 times [2021-06-05 20:31:41,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:41,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491627074] [2021-06-05 20:31:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:41,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:41,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491627074] [2021-06-05 20:31:41,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491627074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:41,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379284727] [2021-06-05 20:31:41,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:41,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:41,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:41,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:42,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379284727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:42,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:42,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:42,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137274215] [2021-06-05 20:31:42,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:42,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:42,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:42,290 INFO L87 Difference]: Start difference. First operand 176 states and 348 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:43,126 INFO L93 Difference]: Finished difference Result 376 states and 728 transitions. [2021-06-05 20:31:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:31:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:43,128 INFO L225 Difference]: With dead ends: 376 [2021-06-05 20:31:43,128 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 20:31:43,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 963.2ms TimeCoverageRelationStatistics Valid=287, Invalid=2065, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:31:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 20:31:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 178. [2021-06-05 20:31:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.9887005649717515) internal successors, (352), 177 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 352 transitions. [2021-06-05 20:31:43,134 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 352 transitions. Word has length 21 [2021-06-05 20:31:43,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:43,134 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 352 transitions. [2021-06-05 20:31:43,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 352 transitions. [2021-06-05 20:31:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:43,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:43,135 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:43,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 20:31:43,357 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:43,358 INFO L82 PathProgramCache]: Analyzing trace with hash -397783105, now seen corresponding path program 9 times [2021-06-05 20:31:43,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:43,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089701447] [2021-06-05 20:31:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:43,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:43,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089701447] [2021-06-05 20:31:43,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089701447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:43,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4609122] [2021-06-05 20:31:43,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:43,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:31:43,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:43,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:43,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:43,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4609122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:43,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:43,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:43,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085950775] [2021-06-05 20:31:43,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:43,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:43,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:43,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:43,948 INFO L87 Difference]: Start difference. First operand 178 states and 352 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:44,690 INFO L93 Difference]: Finished difference Result 374 states and 726 transitions. [2021-06-05 20:31:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:31:44,691 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:44,692 INFO L225 Difference]: With dead ends: 374 [2021-06-05 20:31:44,692 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:31:44,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 877.2ms TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:31:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:31:44,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 180. [2021-06-05 20:31:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.988826815642458) internal successors, (356), 179 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 356 transitions. [2021-06-05 20:31:44,694 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 356 transitions. Word has length 21 [2021-06-05 20:31:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:44,695 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 356 transitions. [2021-06-05 20:31:44,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 356 transitions. [2021-06-05 20:31:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:44,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:44,695 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:44,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 20:31:44,909 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2041501627, now seen corresponding path program 10 times [2021-06-05 20:31:44,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:44,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734778913] [2021-06-05 20:31:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:45,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:45,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734778913] [2021-06-05 20:31:45,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734778913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:45,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442338255] [2021-06-05 20:31:45,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 20:31:45,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:45,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:45,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:45,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:45,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442338255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:45,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:45,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:45,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229508653] [2021-06-05 20:31:45,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:45,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:45,588 INFO L87 Difference]: Start difference. First operand 180 states and 356 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:46,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:46,482 INFO L93 Difference]: Finished difference Result 391 states and 752 transitions. [2021-06-05 20:31:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:31:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:46,484 INFO L225 Difference]: With dead ends: 391 [2021-06-05 20:31:46,484 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 20:31:46,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1013.6ms TimeCoverageRelationStatistics Valid=323, Invalid=2227, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:31:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 20:31:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 184. [2021-06-05 20:31:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.0) internal successors, (366), 183 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 366 transitions. [2021-06-05 20:31:46,487 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 366 transitions. Word has length 21 [2021-06-05 20:31:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:46,488 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 366 transitions. [2021-06-05 20:31:46,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 366 transitions. [2021-06-05 20:31:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:46,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:46,488 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:46,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:46,692 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:46,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:46,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2034178807, now seen corresponding path program 11 times [2021-06-05 20:31:46,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:46,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949973532] [2021-06-05 20:31:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:46,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:46,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949973532] [2021-06-05 20:31:46,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949973532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:46,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251825685] [2021-06-05 20:31:46,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:46,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:46,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:46,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:47,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251825685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:47,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:47,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:47,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719654202] [2021-06-05 20:31:47,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:47,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:47,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:47,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:47,465 INFO L87 Difference]: Start difference. First operand 184 states and 366 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:48,433 INFO L93 Difference]: Finished difference Result 410 states and 792 transitions. [2021-06-05 20:31:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:31:48,434 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:48,435 INFO L225 Difference]: With dead ends: 410 [2021-06-05 20:31:48,435 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 20:31:48,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1185.8ms TimeCoverageRelationStatistics Valid=408, Invalid=2784, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:31:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 20:31:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 194. [2021-06-05 20:31:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.994818652849741) internal successors, (385), 193 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 385 transitions. [2021-06-05 20:31:48,439 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 385 transitions. Word has length 21 [2021-06-05 20:31:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:48,439 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 385 transitions. [2021-06-05 20:31:48,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 385 transitions. [2021-06-05 20:31:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:48,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:48,440 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:48,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 20:31:48,657 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash -164356911, now seen corresponding path program 12 times [2021-06-05 20:31:48,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:48,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298549091] [2021-06-05 20:31:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:48,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:48,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298549091] [2021-06-05 20:31:48,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298549091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:48,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141031772] [2021-06-05 20:31:48,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:48,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:31:48,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:48,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:49,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141031772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:49,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:49,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:49,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285419814] [2021-06-05 20:31:49,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:49,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:49,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:49,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:49,277 INFO L87 Difference]: Start difference. First operand 194 states and 385 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:50,070 INFO L93 Difference]: Finished difference Result 384 states and 746 transitions. [2021-06-05 20:31:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:31:50,071 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:50,072 INFO L225 Difference]: With dead ends: 384 [2021-06-05 20:31:50,072 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 20:31:50,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 928.1ms TimeCoverageRelationStatistics Valid=308, Invalid=2142, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:31:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 20:31:50,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 198. [2021-06-05 20:31:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.0) internal successors, (394), 197 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 394 transitions. [2021-06-05 20:31:50,076 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 394 transitions. Word has length 21 [2021-06-05 20:31:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:50,076 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 394 transitions. [2021-06-05 20:31:50,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 394 transitions. [2021-06-05 20:31:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:50,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:50,077 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:50,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:50,277 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:50,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:50,277 INFO L82 PathProgramCache]: Analyzing trace with hash 727817795, now seen corresponding path program 13 times [2021-06-05 20:31:50,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:50,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620548563] [2021-06-05 20:31:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:50,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:50,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620548563] [2021-06-05 20:31:50,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620548563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:50,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770026502] [2021-06-05 20:31:50,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:50,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:50,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:50,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770026502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:50,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:50,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:50,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666192692] [2021-06-05 20:31:50,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:50,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:50,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:50,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:50,946 INFO L87 Difference]: Start difference. First operand 198 states and 394 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:51,774 INFO L93 Difference]: Finished difference Result 387 states and 751 transitions. [2021-06-05 20:31:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:31:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:51,775 INFO L225 Difference]: With dead ends: 387 [2021-06-05 20:31:51,775 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 20:31:51,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 983.5ms TimeCoverageRelationStatistics Valid=308, Invalid=2142, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:31:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 20:31:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 200. [2021-06-05 20:31:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.0) internal successors, (398), 199 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 398 transitions. [2021-06-05 20:31:51,778 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 398 transitions. Word has length 21 [2021-06-05 20:31:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:51,778 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 398 transitions. [2021-06-05 20:31:51,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 398 transitions. [2021-06-05 20:31:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:51,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:51,779 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:51,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 20:31:51,979 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:51,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1127864769, now seen corresponding path program 14 times [2021-06-05 20:31:51,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:51,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837211555] [2021-06-05 20:31:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:52,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:52,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837211555] [2021-06-05 20:31:52,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837211555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:52,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220497347] [2021-06-05 20:31:52,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:52,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:52,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:52,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:52,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:52,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220497347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:52,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:52,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:52,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764428047] [2021-06-05 20:31:52,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:52,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:52,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:52,561 INFO L87 Difference]: Start difference. First operand 200 states and 398 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:53,759 INFO L93 Difference]: Finished difference Result 406 states and 779 transitions. [2021-06-05 20:31:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:31:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:53,761 INFO L225 Difference]: With dead ends: 406 [2021-06-05 20:31:53,761 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 20:31:53,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1163.6ms TimeCoverageRelationStatistics Valid=436, Invalid=2756, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:31:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 20:31:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 204. [2021-06-05 20:31:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0098522167487687) internal successors, (408), 203 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 408 transitions. [2021-06-05 20:31:53,766 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 408 transitions. Word has length 21 [2021-06-05 20:31:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:53,766 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 408 transitions. [2021-06-05 20:31:53,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 408 transitions. [2021-06-05 20:31:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:53,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:53,766 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:53,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:53,977 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:53,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1135187589, now seen corresponding path program 15 times [2021-06-05 20:31:53,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:53,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39945617] [2021-06-05 20:31:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:54,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:54,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39945617] [2021-06-05 20:31:54,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39945617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:54,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585982892] [2021-06-05 20:31:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:54,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:31:54,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:54,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:54,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585982892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:54,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:54,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:54,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884323422] [2021-06-05 20:31:54,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:54,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:54,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:54,563 INFO L87 Difference]: Start difference. First operand 204 states and 408 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:55,749 INFO L93 Difference]: Finished difference Result 437 states and 843 transitions. [2021-06-05 20:31:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:31:55,749 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:55,750 INFO L225 Difference]: With dead ends: 437 [2021-06-05 20:31:55,750 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 20:31:55,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1160.2ms TimeCoverageRelationStatistics Valid=482, Invalid=3178, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:31:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 20:31:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 198. [2021-06-05 20:31:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.00507614213198) internal successors, (395), 197 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 395 transitions. [2021-06-05 20:31:55,755 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 395 transitions. Word has length 21 [2021-06-05 20:31:55,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:55,755 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 395 transitions. [2021-06-05 20:31:55,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 395 transitions. [2021-06-05 20:31:55,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:55,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:55,755 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:55,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 20:31:55,965 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash 487371647, now seen corresponding path program 16 times [2021-06-05 20:31:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:55,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833151554] [2021-06-05 20:31:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:56,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:56,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833151554] [2021-06-05 20:31:56,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833151554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:56,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181178065] [2021-06-05 20:31:56,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:56,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:56,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:56,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:56,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:56,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181178065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:56,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:56,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:56,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532094375] [2021-06-05 20:31:56,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:56,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:56,559 INFO L87 Difference]: Start difference. First operand 198 states and 395 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:57,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:57,600 INFO L93 Difference]: Finished difference Result 384 states and 747 transitions. [2021-06-05 20:31:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:31:57,601 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:57,602 INFO L225 Difference]: With dead ends: 384 [2021-06-05 20:31:57,602 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 20:31:57,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1010.5ms TimeCoverageRelationStatistics Valid=363, Invalid=2393, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:31:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 20:31:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 202. [2021-06-05 20:31:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.009950248756219) internal successors, (404), 201 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 404 transitions. [2021-06-05 20:31:57,605 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 404 transitions. Word has length 21 [2021-06-05 20:31:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:57,605 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 404 transitions. [2021-06-05 20:31:57,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 404 transitions. [2021-06-05 20:31:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:57,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:57,606 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:57,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:57,821 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1368310917, now seen corresponding path program 17 times [2021-06-05 20:31:57,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:57,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772763089] [2021-06-05 20:31:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:58,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:58,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772763089] [2021-06-05 20:31:58,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772763089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:58,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086870404] [2021-06-05 20:31:58,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:58,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:58,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:58,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:58,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086870404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:58,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:58,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:31:58,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129974407] [2021-06-05 20:31:58,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:31:58,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:31:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:58,438 INFO L87 Difference]: Start difference. First operand 202 states and 404 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:59,532 INFO L93 Difference]: Finished difference Result 401 states and 773 transitions. [2021-06-05 20:31:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:31:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:31:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:59,533 INFO L225 Difference]: With dead ends: 401 [2021-06-05 20:31:59,534 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 20:31:59,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1134.0ms TimeCoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:31:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 20:31:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 206. [2021-06-05 20:31:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.0195121951219512) internal successors, (414), 205 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 414 transitions. [2021-06-05 20:31:59,537 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 414 transitions. Word has length 21 [2021-06-05 20:31:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:59,537 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 414 transitions. [2021-06-05 20:31:59,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 414 transitions. [2021-06-05 20:31:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:31:59,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:59,538 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:59,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 20:31:59,754 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:59,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1375633737, now seen corresponding path program 18 times [2021-06-05 20:31:59,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:59,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877570209] [2021-06-05 20:31:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:59,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:59,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877570209] [2021-06-05 20:31:59,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877570209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:59,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493025988] [2021-06-05 20:31:59,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:59,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:31:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:59,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:31:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:00,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493025988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:00,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:00,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:00,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284078980] [2021-06-05 20:32:00,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:00,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:00,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:00,364 INFO L87 Difference]: Start difference. First operand 206 states and 414 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:01,525 INFO L93 Difference]: Finished difference Result 430 states and 833 transitions. [2021-06-05 20:32:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:32:01,526 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:01,527 INFO L225 Difference]: With dead ends: 430 [2021-06-05 20:32:01,527 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 20:32:01,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1157.7ms TimeCoverageRelationStatistics Valid=469, Invalid=3071, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:32:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 20:32:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2021-06-05 20:32:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.014925373134328) internal successors, (405), 201 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 405 transitions. [2021-06-05 20:32:01,531 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 405 transitions. Word has length 21 [2021-06-05 20:32:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:01,531 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 405 transitions. [2021-06-05 20:32:01,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 405 transitions. [2021-06-05 20:32:01,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:01,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:01,532 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:01,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:01,747 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:01,747 INFO L82 PathProgramCache]: Analyzing trace with hash -624592005, now seen corresponding path program 19 times [2021-06-05 20:32:01,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:01,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877560541] [2021-06-05 20:32:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:01,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:01,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877560541] [2021-06-05 20:32:01,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877560541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:01,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531098799] [2021-06-05 20:32:01,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:01,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:02,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531098799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:02,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:02,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:02,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832147359] [2021-06-05 20:32:02,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:02,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:02,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:02,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:02,428 INFO L87 Difference]: Start difference. First operand 202 states and 405 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:03,839 INFO L93 Difference]: Finished difference Result 450 states and 865 transitions. [2021-06-05 20:32:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:32:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:03,841 INFO L225 Difference]: With dead ends: 450 [2021-06-05 20:32:03,841 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 20:32:03,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1369.9ms TimeCoverageRelationStatistics Valid=534, Invalid=3248, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:32:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 20:32:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 210. [2021-06-05 20:32:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0430622009569377) internal successors, (427), 209 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 427 transitions. [2021-06-05 20:32:03,844 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 427 transitions. Word has length 21 [2021-06-05 20:32:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:03,844 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 427 transitions. [2021-06-05 20:32:03,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 427 transitions. [2021-06-05 20:32:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:03,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:03,845 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:04,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 20:32:04,053 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash -631914825, now seen corresponding path program 20 times [2021-06-05 20:32:04,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:04,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295312897] [2021-06-05 20:32:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:04,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:04,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295312897] [2021-06-05 20:32:04,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295312897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:04,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735562629] [2021-06-05 20:32:04,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:04,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:04,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:04,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:04,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:04,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735562629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:04,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:04,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:04,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891011170] [2021-06-05 20:32:04,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:04,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:04,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:04,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:04,650 INFO L87 Difference]: Start difference. First operand 210 states and 427 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:06,199 INFO L93 Difference]: Finished difference Result 498 states and 959 transitions. [2021-06-05 20:32:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 20:32:06,199 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:06,200 INFO L225 Difference]: With dead ends: 498 [2021-06-05 20:32:06,200 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 20:32:06,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1438.4ms TimeCoverageRelationStatistics Valid=668, Invalid=4302, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 20:32:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 20:32:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 210. [2021-06-05 20:32:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 429 transitions. [2021-06-05 20:32:06,204 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 429 transitions. Word has length 21 [2021-06-05 20:32:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:06,204 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 429 transitions. [2021-06-05 20:32:06,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 429 transitions. [2021-06-05 20:32:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:06,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:06,205 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:06,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 20:32:06,411 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:06,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1479374519, now seen corresponding path program 21 times [2021-06-05 20:32:06,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:06,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143828973] [2021-06-05 20:32:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:06,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:06,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143828973] [2021-06-05 20:32:06,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143828973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:06,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645527675] [2021-06-05 20:32:06,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:06,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:32:06,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:06,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:06,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:06,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645527675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:06,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:06,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:06,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522992798] [2021-06-05 20:32:06,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:06,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:06,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:06,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:06,998 INFO L87 Difference]: Start difference. First operand 210 states and 429 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:08,332 INFO L93 Difference]: Finished difference Result 455 states and 890 transitions. [2021-06-05 20:32:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 20:32:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:08,333 INFO L225 Difference]: With dead ends: 455 [2021-06-05 20:32:08,333 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 20:32:08,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1252.5ms TimeCoverageRelationStatistics Valid=573, Invalid=3717, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 20:32:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 20:32:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 207. [2021-06-05 20:32:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.033980582524272) internal successors, (419), 206 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 419 transitions. [2021-06-05 20:32:08,336 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 419 transitions. Word has length 21 [2021-06-05 20:32:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:08,337 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 419 transitions. [2021-06-05 20:32:08,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 419 transitions. [2021-06-05 20:32:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:08,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:08,337 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:08,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 20:32:08,538 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1157251378, now seen corresponding path program 24 times [2021-06-05 20:32:08,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:08,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325945967] [2021-06-05 20:32:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:08,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:08,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325945967] [2021-06-05 20:32:08,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325945967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:08,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148316301] [2021-06-05 20:32:08,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:08,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:32:08,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:08,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:32:08,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:08,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148316301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:08,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:08,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 20:32:08,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149502530] [2021-06-05 20:32:08,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:32:08,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:32:08,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:32:08,873 INFO L87 Difference]: Start difference. First operand 207 states and 419 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:09,414 INFO L93 Difference]: Finished difference Result 338 states and 673 transitions. [2021-06-05 20:32:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 20:32:09,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:09,415 INFO L225 Difference]: With dead ends: 338 [2021-06-05 20:32:09,415 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 20:32:09,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 20:32:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 204. [2021-06-05 20:32:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-06-05 20:32:09,418 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 21 [2021-06-05 20:32:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:09,418 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-06-05 20:32:09,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-06-05 20:32:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:09,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:09,419 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:09,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:09,619 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:09,619 INFO L82 PathProgramCache]: Analyzing trace with hash 803147293, now seen corresponding path program 22 times [2021-06-05 20:32:09,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:09,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065494502] [2021-06-05 20:32:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:09,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065494502] [2021-06-05 20:32:09,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065494502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136919900] [2021-06-05 20:32:09,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:09,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:09,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:09,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:09,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:10,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136919900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:10,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:10,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:10,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827688178] [2021-06-05 20:32:10,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:10,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:10,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:10,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:10,231 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:10,937 INFO L93 Difference]: Finished difference Result 369 states and 730 transitions. [2021-06-05 20:32:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:32:10,937 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:10,938 INFO L225 Difference]: With dead ends: 369 [2021-06-05 20:32:10,939 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 20:32:10,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 854.2ms TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:32:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 20:32:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 209. [2021-06-05 20:32:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0336538461538463) internal successors, (423), 208 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 423 transitions. [2021-06-05 20:32:10,943 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 423 transitions. Word has length 21 [2021-06-05 20:32:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:10,943 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 423 transitions. [2021-06-05 20:32:10,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 423 transitions. [2021-06-05 20:32:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:10,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:10,943 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:11,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:11,161 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:11,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:11,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1946056905, now seen corresponding path program 23 times [2021-06-05 20:32:11,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:11,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8036632] [2021-06-05 20:32:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:11,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:11,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8036632] [2021-06-05 20:32:11,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8036632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:11,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235693391] [2021-06-05 20:32:11,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:11,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:11,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:11,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:11,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235693391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:11,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:11,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:11,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283712282] [2021-06-05 20:32:11,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:11,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:11,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:11,783 INFO L87 Difference]: Start difference. First operand 209 states and 423 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:12,493 INFO L93 Difference]: Finished difference Result 376 states and 741 transitions. [2021-06-05 20:32:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:32:12,493 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:12,495 INFO L225 Difference]: With dead ends: 376 [2021-06-05 20:32:12,495 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 20:32:12,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 844.5ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:32:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 20:32:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 211. [2021-06-05 20:32:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.033333333333333) internal successors, (427), 210 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 427 transitions. [2021-06-05 20:32:12,503 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 427 transitions. Word has length 21 [2021-06-05 20:32:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:12,503 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 427 transitions. [2021-06-05 20:32:12,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 427 transitions. [2021-06-05 20:32:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:12,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:12,504 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:12,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:12,719 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1456735685, now seen corresponding path program 24 times [2021-06-05 20:32:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:12,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474426178] [2021-06-05 20:32:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:12,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:12,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474426178] [2021-06-05 20:32:12,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474426178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:12,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372899336] [2021-06-05 20:32:12,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:12,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:32:12,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:12,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:13,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372899336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:13,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:13,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:13,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756839665] [2021-06-05 20:32:13,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:13,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:13,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:13,346 INFO L87 Difference]: Start difference. First operand 211 states and 427 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:13,994 INFO L93 Difference]: Finished difference Result 374 states and 739 transitions. [2021-06-05 20:32:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:32:13,995 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:13,996 INFO L225 Difference]: With dead ends: 374 [2021-06-05 20:32:13,996 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:32:13,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 847.5ms TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:32:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:32:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 213. [2021-06-05 20:32:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.0330188679245285) internal successors, (431), 212 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 431 transitions. [2021-06-05 20:32:14,000 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 431 transitions. Word has length 21 [2021-06-05 20:32:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:14,000 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 431 transitions. [2021-06-05 20:32:14,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 431 transitions. [2021-06-05 20:32:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:14,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:14,001 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:14,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 20:32:14,205 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:14,205 INFO L82 PathProgramCache]: Analyzing trace with hash 982549047, now seen corresponding path program 25 times [2021-06-05 20:32:14,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:14,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962120678] [2021-06-05 20:32:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:14,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962120678] [2021-06-05 20:32:14,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962120678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884010036] [2021-06-05 20:32:14,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:14,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:14,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884010036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:14,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:14,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:14,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129164703] [2021-06-05 20:32:14,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:14,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:14,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:14,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:14,822 INFO L87 Difference]: Start difference. First operand 213 states and 431 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:15,636 INFO L93 Difference]: Finished difference Result 383 states and 754 transitions. [2021-06-05 20:32:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:32:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:15,637 INFO L225 Difference]: With dead ends: 383 [2021-06-05 20:32:15,637 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 20:32:15,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 920.0ms TimeCoverageRelationStatistics Valid=312, Invalid=2238, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:32:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 20:32:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 207. [2021-06-05 20:32:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.033980582524272) internal successors, (419), 206 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 419 transitions. [2021-06-05 20:32:15,641 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 419 transitions. Word has length 21 [2021-06-05 20:32:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:15,641 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 419 transitions. [2021-06-05 20:32:15,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 419 transitions. [2021-06-05 20:32:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:15,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:15,642 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:15,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:15,849 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1223309491, now seen corresponding path program 26 times [2021-06-05 20:32:15,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:15,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965276361] [2021-06-05 20:32:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:16,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:16,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965276361] [2021-06-05 20:32:16,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965276361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:16,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387169181] [2021-06-05 20:32:16,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:16,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:16,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:16,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:16,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387169181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:16,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:16,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:16,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459160020] [2021-06-05 20:32:16,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:16,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:16,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:16,458 INFO L87 Difference]: Start difference. First operand 207 states and 419 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:17,289 INFO L93 Difference]: Finished difference Result 378 states and 745 transitions. [2021-06-05 20:32:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:32:17,289 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:17,290 INFO L225 Difference]: With dead ends: 378 [2021-06-05 20:32:17,290 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 20:32:17,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 915.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:32:17,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 20:32:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 211. [2021-06-05 20:32:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.038095238095238) internal successors, (428), 210 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 428 transitions. [2021-06-05 20:32:17,293 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 428 transitions. Word has length 21 [2021-06-05 20:32:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:17,293 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 428 transitions. [2021-06-05 20:32:17,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 428 transitions. [2021-06-05 20:32:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:17,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:17,293 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:17,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:17,494 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:17,494 INFO L82 PathProgramCache]: Analyzing trace with hash -331134785, now seen corresponding path program 27 times [2021-06-05 20:32:17,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:17,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720604637] [2021-06-05 20:32:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:17,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:17,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720604637] [2021-06-05 20:32:17,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720604637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:17,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498852776] [2021-06-05 20:32:17,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:17,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:32:17,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:17,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:18,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498852776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:18,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:18,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:18,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139265385] [2021-06-05 20:32:18,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:18,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:18,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:18,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:18,174 INFO L87 Difference]: Start difference. First operand 211 states and 428 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:18,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:18,939 INFO L93 Difference]: Finished difference Result 381 states and 750 transitions. [2021-06-05 20:32:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:32:18,939 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:18,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:18,940 INFO L225 Difference]: With dead ends: 381 [2021-06-05 20:32:18,940 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 20:32:18,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 910.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:32:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 20:32:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 213. [2021-06-05 20:32:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.0377358490566038) internal successors, (432), 212 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 432 transitions. [2021-06-05 20:32:18,943 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 432 transitions. Word has length 21 [2021-06-05 20:32:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:18,943 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 432 transitions. [2021-06-05 20:32:18,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 432 transitions. [2021-06-05 20:32:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:18,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:18,943 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:19,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:19,145 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2108149947, now seen corresponding path program 28 times [2021-06-05 20:32:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:19,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419585398] [2021-06-05 20:32:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:19,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:19,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419585398] [2021-06-05 20:32:19,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419585398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:19,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146366007] [2021-06-05 20:32:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:19,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:19,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:19,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:19,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:19,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146366007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:19,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:19,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:19,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268714483] [2021-06-05 20:32:19,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:19,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:19,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:19,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:19,749 INFO L87 Difference]: Start difference. First operand 213 states and 432 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:20,842 INFO L93 Difference]: Finished difference Result 391 states and 766 transitions. [2021-06-05 20:32:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:32:20,843 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:20,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:20,843 INFO L225 Difference]: With dead ends: 391 [2021-06-05 20:32:20,843 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 20:32:20,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1104.2ms TimeCoverageRelationStatistics Valid=402, Invalid=2790, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:32:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 20:32:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 209. [2021-06-05 20:32:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0384615384615383) internal successors, (424), 208 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 424 transitions. [2021-06-05 20:32:20,846 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 424 transitions. Word has length 21 [2021-06-05 20:32:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:20,846 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 424 transitions. [2021-06-05 20:32:20,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 424 transitions. [2021-06-05 20:32:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:20,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:20,847 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:21,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 20:32:21,047 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:21,048 INFO L82 PathProgramCache]: Analyzing trace with hash -571580933, now seen corresponding path program 29 times [2021-06-05 20:32:21,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:21,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767631510] [2021-06-05 20:32:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:21,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:21,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767631510] [2021-06-05 20:32:21,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767631510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:21,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424266009] [2021-06-05 20:32:21,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:21,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:21,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:21,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:21,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424266009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:21,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:21,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:21,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515081413] [2021-06-05 20:32:21,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:21,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:21,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:21,640 INFO L87 Difference]: Start difference. First operand 209 states and 424 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:22,552 INFO L93 Difference]: Finished difference Result 375 states and 740 transitions. [2021-06-05 20:32:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:32:22,553 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:22,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:22,553 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:32:22,553 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 20:32:22,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 917.1ms TimeCoverageRelationStatistics Valid=328, Invalid=2324, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:32:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 20:32:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 213. [2021-06-05 20:32:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.042452830188679) internal successors, (433), 212 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 433 transitions. [2021-06-05 20:32:22,556 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 433 transitions. Word has length 21 [2021-06-05 20:32:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:22,556 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 433 transitions. [2021-06-05 20:32:22,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 433 transitions. [2021-06-05 20:32:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:22,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:22,557 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:22,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:22,757 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1867703799, now seen corresponding path program 30 times [2021-06-05 20:32:22,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:22,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449053412] [2021-06-05 20:32:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:22,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:22,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449053412] [2021-06-05 20:32:22,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449053412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:22,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566593695] [2021-06-05 20:32:22,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:23,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:32:23,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:23,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:23,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:23,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566593695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:23,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:23,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:23,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769124556] [2021-06-05 20:32:23,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:23,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:23,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:23,442 INFO L87 Difference]: Start difference. First operand 213 states and 433 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:24,373 INFO L93 Difference]: Finished difference Result 384 states and 755 transitions. [2021-06-05 20:32:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:32:24,374 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:24,374 INFO L225 Difference]: With dead ends: 384 [2021-06-05 20:32:24,374 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 20:32:24,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1043.3ms TimeCoverageRelationStatistics Valid=362, Invalid=2500, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:32:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 20:32:24,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 211. [2021-06-05 20:32:24,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.0428571428571427) internal successors, (429), 210 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 429 transitions. [2021-06-05 20:32:24,377 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 429 transitions. Word has length 21 [2021-06-05 20:32:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:24,377 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 429 transitions. [2021-06-05 20:32:24,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:24,377 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 429 transitions. [2021-06-05 20:32:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:24,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:24,378 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:24,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:24,578 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:24,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1683544585, now seen corresponding path program 31 times [2021-06-05 20:32:24,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:24,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598168734] [2021-06-05 20:32:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:24,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:24,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598168734] [2021-06-05 20:32:24,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598168734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:24,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524641498] [2021-06-05 20:32:24,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:24,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:24,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:25,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524641498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:25,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:25,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:25,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590782682] [2021-06-05 20:32:25,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:25,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:25,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:25,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:25,204 INFO L87 Difference]: Start difference. First operand 211 states and 429 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:26,248 INFO L93 Difference]: Finished difference Result 407 states and 805 transitions. [2021-06-05 20:32:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:32:26,249 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:26,249 INFO L225 Difference]: With dead ends: 407 [2021-06-05 20:32:26,249 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 20:32:26,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1075.7ms TimeCoverageRelationStatistics Valid=402, Invalid=2678, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:32:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 20:32:26,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 208. [2021-06-05 20:32:26,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.028985507246377) internal successors, (420), 207 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 420 transitions. [2021-06-05 20:32:26,255 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 420 transitions. Word has length 21 [2021-06-05 20:32:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:26,255 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 420 transitions. [2021-06-05 20:32:26,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 420 transitions. [2021-06-05 20:32:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:26,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:26,256 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:26,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 20:32:26,461 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:26,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2044897693, now seen corresponding path program 32 times [2021-06-05 20:32:26,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:26,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247368636] [2021-06-05 20:32:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:26,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247368636] [2021-06-05 20:32:26,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247368636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724683942] [2021-06-05 20:32:26,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:26,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:26,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:26,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:26,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:27,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724683942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:27,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:27,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:27,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591749057] [2021-06-05 20:32:27,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:27,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:27,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:27,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:27,066 INFO L87 Difference]: Start difference. First operand 208 states and 420 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:27,915 INFO L93 Difference]: Finished difference Result 373 states and 741 transitions. [2021-06-05 20:32:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:32:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:27,916 INFO L225 Difference]: With dead ends: 373 [2021-06-05 20:32:27,916 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 20:32:27,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 922.8ms TimeCoverageRelationStatistics Valid=331, Invalid=2321, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:32:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 20:32:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 209. [2021-06-05 20:32:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0288461538461537) internal successors, (422), 208 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 422 transitions. [2021-06-05 20:32:27,920 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 422 transitions. Word has length 21 [2021-06-05 20:32:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:27,920 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 422 transitions. [2021-06-05 20:32:27,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 422 transitions. [2021-06-05 20:32:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:27,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:27,920 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:28,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:28,121 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:28,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1126947503, now seen corresponding path program 33 times [2021-06-05 20:32:28,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:28,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985293101] [2021-06-05 20:32:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:28,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:28,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985293101] [2021-06-05 20:32:28,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985293101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:28,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023707473] [2021-06-05 20:32:28,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:28,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:32:28,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:28,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:28,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:28,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023707473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:28,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:28,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:28,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287351484] [2021-06-05 20:32:28,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:28,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:28,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:28,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:28,734 INFO L87 Difference]: Start difference. First operand 209 states and 422 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:29,872 INFO L93 Difference]: Finished difference Result 377 states and 749 transitions. [2021-06-05 20:32:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:32:29,872 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:29,873 INFO L225 Difference]: With dead ends: 377 [2021-06-05 20:32:29,873 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 20:32:29,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1070.1ms TimeCoverageRelationStatistics Valid=386, Invalid=2584, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:32:29,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 20:32:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 205. [2021-06-05 20:32:29,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.0294117647058822) internal successors, (414), 204 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 414 transitions. [2021-06-05 20:32:29,877 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 414 transitions. Word has length 21 [2021-06-05 20:32:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:29,877 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 414 transitions. [2021-06-05 20:32:29,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 414 transitions. [2021-06-05 20:32:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:29,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:29,878 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:30,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:30,081 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash 938815761, now seen corresponding path program 34 times [2021-06-05 20:32:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:30,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626570047] [2021-06-05 20:32:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:30,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:30,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626570047] [2021-06-05 20:32:30,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626570047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:30,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318606150] [2021-06-05 20:32:30,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:30,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:30,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:30,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:30,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318606150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:30,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:30,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:30,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771369311] [2021-06-05 20:32:30,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:30,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:30,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:30,696 INFO L87 Difference]: Start difference. First operand 205 states and 414 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:31,453 INFO L93 Difference]: Finished difference Result 354 states and 699 transitions. [2021-06-05 20:32:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:32:31,453 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:31,454 INFO L225 Difference]: With dead ends: 354 [2021-06-05 20:32:31,454 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 20:32:31,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 827.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:32:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 20:32:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 210. [2021-06-05 20:32:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0334928229665072) internal successors, (425), 209 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 425 transitions. [2021-06-05 20:32:31,457 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 425 transitions. Word has length 21 [2021-06-05 20:32:31,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:31,457 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 425 transitions. [2021-06-05 20:32:31,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 425 transitions. [2021-06-05 20:32:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:31,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:31,457 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:31,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:31,658 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:31,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1830990467, now seen corresponding path program 35 times [2021-06-05 20:32:31,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:31,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270303947] [2021-06-05 20:32:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:31,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270303947] [2021-06-05 20:32:31,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270303947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389268248] [2021-06-05 20:32:31,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:31,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:31,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:31,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:31,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:32,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389268248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:32,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:32,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:32,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750558091] [2021-06-05 20:32:32,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:32,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:32,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:32,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:32,484 INFO L87 Difference]: Start difference. First operand 210 states and 425 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:33,264 INFO L93 Difference]: Finished difference Result 357 states and 704 transitions. [2021-06-05 20:32:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:32:33,265 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:33,265 INFO L225 Difference]: With dead ends: 357 [2021-06-05 20:32:33,265 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 20:32:33,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1029.1ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:32:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 20:32:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 212. [2021-06-05 20:32:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.0331753554502368) internal successors, (429), 211 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 429 transitions. [2021-06-05 20:32:33,268 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 429 transitions. Word has length 21 [2021-06-05 20:32:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:33,268 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 429 transitions. [2021-06-05 20:32:33,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 429 transitions. [2021-06-05 20:32:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:33,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:33,269 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:33,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:33,470 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:33,470 INFO L82 PathProgramCache]: Analyzing trace with hash -24692097, now seen corresponding path program 36 times [2021-06-05 20:32:33,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:33,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144056150] [2021-06-05 20:32:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:33,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:33,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144056150] [2021-06-05 20:32:33,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144056150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:33,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119645873] [2021-06-05 20:32:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 20:32:33,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:32:33,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:33,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:33,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:34,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119645873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:34,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:34,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:34,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887705347] [2021-06-05 20:32:34,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:34,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:34,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:34,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:34,310 INFO L87 Difference]: Start difference. First operand 212 states and 429 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:35,245 INFO L93 Difference]: Finished difference Result 374 states and 730 transitions. [2021-06-05 20:32:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:32:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:35,246 INFO L225 Difference]: With dead ends: 374 [2021-06-05 20:32:35,246 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:32:35,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1205.4ms TimeCoverageRelationStatistics Valid=372, Invalid=2598, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:32:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:32:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 216. [2021-06-05 20:32:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.041860465116279) internal successors, (439), 215 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 439 transitions. [2021-06-05 20:32:35,249 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 439 transitions. Word has length 21 [2021-06-05 20:32:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:35,249 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 439 transitions. [2021-06-05 20:32:35,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:35,249 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 439 transitions. [2021-06-05 20:32:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:35,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:35,250 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:35,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:35,450 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:35,451 INFO L82 PathProgramCache]: Analyzing trace with hash -32014917, now seen corresponding path program 37 times [2021-06-05 20:32:35,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:35,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055929945] [2021-06-05 20:32:35,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:35,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:35,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055929945] [2021-06-05 20:32:35,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055929945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:35,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768164272] [2021-06-05 20:32:35,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:35,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:35,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:36,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768164272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:36,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:36,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:36,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205273931] [2021-06-05 20:32:36,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:36,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:36,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:36,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:36,147 INFO L87 Difference]: Start difference. First operand 216 states and 439 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:37,222 INFO L93 Difference]: Finished difference Result 396 states and 777 transitions. [2021-06-05 20:32:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:32:37,223 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:37,223 INFO L225 Difference]: With dead ends: 396 [2021-06-05 20:32:37,223 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 20:32:37,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1175.4ms TimeCoverageRelationStatistics Valid=450, Invalid=2972, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:32:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 20:32:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 211. [2021-06-05 20:32:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.038095238095238) internal successors, (428), 210 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 428 transitions. [2021-06-05 20:32:37,227 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 428 transitions. Word has length 21 [2021-06-05 20:32:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:37,227 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 428 transitions. [2021-06-05 20:32:37,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 428 transitions. [2021-06-05 20:32:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:37,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:37,227 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:37,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:37,428 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:37,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:37,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1590544319, now seen corresponding path program 38 times [2021-06-05 20:32:37,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:37,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181084808] [2021-06-05 20:32:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:37,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:37,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181084808] [2021-06-05 20:32:37,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181084808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:37,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082584844] [2021-06-05 20:32:37,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:37,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:37,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:37,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:38,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082584844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:38,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:38,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:38,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576254121] [2021-06-05 20:32:38,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:38,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:38,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:38,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:38,029 INFO L87 Difference]: Start difference. First operand 211 states and 428 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:38,891 INFO L93 Difference]: Finished difference Result 366 states and 723 transitions. [2021-06-05 20:32:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:32:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:38,892 INFO L225 Difference]: With dead ends: 366 [2021-06-05 20:32:38,892 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 20:32:38,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 894.9ms TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:32:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 20:32:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 215. [2021-06-05 20:32:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.042056074766355) internal successors, (437), 214 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 437 transitions. [2021-06-05 20:32:38,895 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 437 transitions. Word has length 21 [2021-06-05 20:32:38,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:38,895 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 437 transitions. [2021-06-05 20:32:38,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 437 transitions. [2021-06-05 20:32:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:38,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:38,896 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:39,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 20:32:39,096 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash -265138245, now seen corresponding path program 39 times [2021-06-05 20:32:39,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:39,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587933452] [2021-06-05 20:32:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:39,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:39,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587933452] [2021-06-05 20:32:39,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587933452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:39,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239759577] [2021-06-05 20:32:39,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:39,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:32:39,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:39,293 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:39,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:39,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239759577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:39,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:39,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:39,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855935299] [2021-06-05 20:32:39,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:39,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:39,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:39,699 INFO L87 Difference]: Start difference. First operand 215 states and 437 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:40,584 INFO L93 Difference]: Finished difference Result 388 states and 753 transitions. [2021-06-05 20:32:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:32:40,585 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:40,585 INFO L225 Difference]: With dead ends: 388 [2021-06-05 20:32:40,585 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 20:32:40,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 953.8ms TimeCoverageRelationStatistics Valid=351, Invalid=2405, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:32:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 20:32:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 224. [2021-06-05 20:32:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0538116591928253) internal successors, (458), 223 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 458 transitions. [2021-06-05 20:32:40,589 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 458 transitions. Word has length 21 [2021-06-05 20:32:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:40,589 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 458 transitions. [2021-06-05 20:32:40,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:40,589 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 458 transitions. [2021-06-05 20:32:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:40,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:40,589 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:40,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:40,805 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:40,805 INFO L82 PathProgramCache]: Analyzing trace with hash -272461065, now seen corresponding path program 40 times [2021-06-05 20:32:40,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:40,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066428759] [2021-06-05 20:32:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:41,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:41,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066428759] [2021-06-05 20:32:41,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066428759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:41,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053061152] [2021-06-05 20:32:41,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 20:32:41,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:41,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:41,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:41,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:41,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053061152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:41,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:41,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:41,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84338890] [2021-06-05 20:32:41,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:41,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:41,547 INFO L87 Difference]: Start difference. First operand 224 states and 458 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:42,548 INFO L93 Difference]: Finished difference Result 406 states and 798 transitions. [2021-06-05 20:32:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:32:42,548 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:42,549 INFO L225 Difference]: With dead ends: 406 [2021-06-05 20:32:42,549 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 20:32:42,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1158.0ms TimeCoverageRelationStatistics Valid=434, Invalid=2758, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:32:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 20:32:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 221. [2021-06-05 20:32:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.05) internal successors, (451), 220 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 451 transitions. [2021-06-05 20:32:42,552 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 451 transitions. Word has length 21 [2021-06-05 20:32:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:42,552 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 451 transitions. [2021-06-05 20:32:42,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 451 transitions. [2021-06-05 20:32:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:42,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:42,552 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:42,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 20:32:42,757 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:42,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:42,757 INFO L82 PathProgramCache]: Analyzing trace with hash 478580667, now seen corresponding path program 41 times [2021-06-05 20:32:42,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:42,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085938880] [2021-06-05 20:32:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:42,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085938880] [2021-06-05 20:32:42,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085938880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552686599] [2021-06-05 20:32:42,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:43,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:43,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:43,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:43,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:43,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552686599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:43,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:43,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:43,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617271397] [2021-06-05 20:32:43,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:43,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:43,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:43,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:43,498 INFO L87 Difference]: Start difference. First operand 221 states and 451 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:44,599 INFO L93 Difference]: Finished difference Result 414 states and 812 transitions. [2021-06-05 20:32:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:32:44,600 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:44,600 INFO L225 Difference]: With dead ends: 414 [2021-06-05 20:32:44,601 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 20:32:44,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1142.6ms TimeCoverageRelationStatistics Valid=397, Invalid=2573, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:32:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 20:32:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 227. [2021-06-05 20:32:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.0707964601769913) internal successors, (468), 226 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 468 transitions. [2021-06-05 20:32:44,605 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 468 transitions. Word has length 21 [2021-06-05 20:32:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:44,605 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 468 transitions. [2021-06-05 20:32:44,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 468 transitions. [2021-06-05 20:32:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:44,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:44,606 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:44,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 20:32:44,806 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:44,807 INFO L82 PathProgramCache]: Analyzing trace with hash 471257847, now seen corresponding path program 42 times [2021-06-05 20:32:44,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:44,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2987039] [2021-06-05 20:32:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:44,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:44,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2987039] [2021-06-05 20:32:44,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2987039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:44,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90785036] [2021-06-05 20:32:44,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:45,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:32:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:45,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:45,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90785036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:45,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:45,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:45,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448745975] [2021-06-05 20:32:45,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:45,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:45,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:45,407 INFO L87 Difference]: Start difference. First operand 227 states and 468 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:46,675 INFO L93 Difference]: Finished difference Result 452 states and 884 transitions. [2021-06-05 20:32:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:32:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:46,676 INFO L225 Difference]: With dead ends: 452 [2021-06-05 20:32:46,676 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 20:32:46,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1214.0ms TimeCoverageRelationStatistics Valid=556, Invalid=3350, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:32:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 20:32:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 225. [2021-06-05 20:32:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.075892857142857) internal successors, (465), 224 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 465 transitions. [2021-06-05 20:32:46,680 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 465 transitions. Word has length 21 [2021-06-05 20:32:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:46,680 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 465 transitions. [2021-06-05 20:32:46,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 465 transitions. [2021-06-05 20:32:46,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:46,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:46,680 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:46,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:46,892 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1712420105, now seen corresponding path program 43 times [2021-06-05 20:32:46,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:46,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231766183] [2021-06-05 20:32:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:47,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:47,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231766183] [2021-06-05 20:32:47,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231766183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:47,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912167425] [2021-06-05 20:32:47,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:47,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:47,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:47,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912167425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:47,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:47,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:47,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028568889] [2021-06-05 20:32:47,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:47,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:47,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:47,512 INFO L87 Difference]: Start difference. First operand 225 states and 465 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:48,705 INFO L93 Difference]: Finished difference Result 435 states and 862 transitions. [2021-06-05 20:32:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:32:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:48,706 INFO L225 Difference]: With dead ends: 435 [2021-06-05 20:32:48,706 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 20:32:48,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1137.8ms TimeCoverageRelationStatistics Valid=520, Invalid=3140, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:32:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 20:32:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 217. [2021-06-05 20:32:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0324074074074074) internal successors, (439), 216 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 439 transitions. [2021-06-05 20:32:48,710 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 439 transitions. Word has length 21 [2021-06-05 20:32:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:48,710 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 439 transitions. [2021-06-05 20:32:48,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 439 transitions. [2021-06-05 20:32:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:48,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:48,710 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:48,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:48,911 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash 354954789, now seen corresponding path program 44 times [2021-06-05 20:32:48,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:48,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960638062] [2021-06-05 20:32:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:49,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:49,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960638062] [2021-06-05 20:32:49,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960638062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:49,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195837043] [2021-06-05 20:32:49,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:49,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:49,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:49,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:49,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195837043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:49,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:49,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:49,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969841520] [2021-06-05 20:32:49,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:49,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:49,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:49,537 INFO L87 Difference]: Start difference. First operand 217 states and 439 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:50,480 INFO L93 Difference]: Finished difference Result 387 states and 766 transitions. [2021-06-05 20:32:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:32:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:50,481 INFO L225 Difference]: With dead ends: 387 [2021-06-05 20:32:50,481 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 20:32:50,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 940.4ms TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:32:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 20:32:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 222. [2021-06-05 20:32:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.0542986425339365) internal successors, (454), 221 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 454 transitions. [2021-06-05 20:32:50,484 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 454 transitions. Word has length 21 [2021-06-05 20:32:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:50,484 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 454 transitions. [2021-06-05 20:32:50,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 454 transitions. [2021-06-05 20:32:50,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:50,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:50,485 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:50,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:50,685 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:50,686 INFO L82 PathProgramCache]: Analyzing trace with hash 347631969, now seen corresponding path program 45 times [2021-06-05 20:32:50,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:50,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138030710] [2021-06-05 20:32:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:50,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:50,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138030710] [2021-06-05 20:32:50,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138030710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:50,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788059557] [2021-06-05 20:32:50,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:50,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:32:50,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:50,947 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:50,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:51,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788059557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:51,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:51,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:51,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669034928] [2021-06-05 20:32:51,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:51,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:51,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:51,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:51,416 INFO L87 Difference]: Start difference. First operand 222 states and 454 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:52,590 INFO L93 Difference]: Finished difference Result 418 states and 826 transitions. [2021-06-05 20:32:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:32:52,591 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:52,592 INFO L225 Difference]: With dead ends: 418 [2021-06-05 20:32:52,592 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 20:32:52,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1247.0ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:32:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 20:32:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 223. [2021-06-05 20:32:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.0585585585585586) internal successors, (457), 222 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 457 transitions. [2021-06-05 20:32:52,596 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 457 transitions. Word has length 21 [2021-06-05 20:32:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:52,596 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 457 transitions. [2021-06-05 20:32:52,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 457 transitions. [2021-06-05 20:32:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:52,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:52,597 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:52,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 20:32:52,813 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1836045983, now seen corresponding path program 46 times [2021-06-05 20:32:52,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:52,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119433427] [2021-06-05 20:32:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:52,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:52,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119433427] [2021-06-05 20:32:52,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119433427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:52,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087112097] [2021-06-05 20:32:52,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:53,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:53,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:53,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:53,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:53,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087112097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:53,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:53,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:53,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194902430] [2021-06-05 20:32:53,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:53,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:53,408 INFO L87 Difference]: Start difference. First operand 223 states and 457 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:54,514 INFO L93 Difference]: Finished difference Result 421 states and 835 transitions. [2021-06-05 20:32:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:32:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:54,515 INFO L225 Difference]: With dead ends: 421 [2021-06-05 20:32:54,515 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 20:32:54,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1117.8ms TimeCoverageRelationStatistics Valid=515, Invalid=3145, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:32:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 20:32:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 219. [2021-06-05 20:32:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.032110091743119) internal successors, (443), 218 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 443 transitions. [2021-06-05 20:32:54,519 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 443 transitions. Word has length 21 [2021-06-05 20:32:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:54,519 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 443 transitions. [2021-06-05 20:32:54,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 443 transitions. [2021-06-05 20:32:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:54,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:54,519 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:54,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:54,721 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:54,721 INFO L82 PathProgramCache]: Analyzing trace with hash -562995401, now seen corresponding path program 47 times [2021-06-05 20:32:54,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:54,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147082266] [2021-06-05 20:32:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:54,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:54,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147082266] [2021-06-05 20:32:54,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147082266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:54,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453161847] [2021-06-05 20:32:54,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:54,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:54,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:55,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453161847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:55,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:55,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:55,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407562196] [2021-06-05 20:32:55,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:55,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:55,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:55,312 INFO L87 Difference]: Start difference. First operand 219 states and 443 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:56,315 INFO L93 Difference]: Finished difference Result 392 states and 776 transitions. [2021-06-05 20:32:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:32:56,315 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:56,316 INFO L225 Difference]: With dead ends: 392 [2021-06-05 20:32:56,316 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 20:32:56,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1003.3ms TimeCoverageRelationStatistics Valid=401, Invalid=2569, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:32:56,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 20:32:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 225. [2021-06-05 20:32:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0535714285714284) internal successors, (460), 224 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 460 transitions. [2021-06-05 20:32:56,319 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 460 transitions. Word has length 21 [2021-06-05 20:32:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:56,319 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 460 transitions. [2021-06-05 20:32:56,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 460 transitions. [2021-06-05 20:32:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:56,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:56,320 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:56,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 20:32:56,525 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash -570318221, now seen corresponding path program 48 times [2021-06-05 20:32:56,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:56,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727353385] [2021-06-05 20:32:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:56,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:56,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727353385] [2021-06-05 20:32:56,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727353385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:56,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257270214] [2021-06-05 20:32:56,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:56,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:32:56,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:56,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:56,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:57,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257270214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:57,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:57,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:57,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118986093] [2021-06-05 20:32:57,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:57,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:57,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:57,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:57,128 INFO L87 Difference]: Start difference. First operand 225 states and 460 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:58,296 INFO L93 Difference]: Finished difference Result 426 states and 842 transitions. [2021-06-05 20:32:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:32:58,296 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:32:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:58,297 INFO L225 Difference]: With dead ends: 426 [2021-06-05 20:32:58,297 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 20:32:58,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1175.8ms TimeCoverageRelationStatistics Valid=563, Invalid=3343, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:32:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 20:32:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 223. [2021-06-05 20:32:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.0585585585585586) internal successors, (457), 222 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 457 transitions. [2021-06-05 20:32:58,301 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 457 transitions. Word has length 21 [2021-06-05 20:32:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:58,301 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 457 transitions. [2021-06-05 20:32:58,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 457 transitions. [2021-06-05 20:32:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:32:58,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:58,301 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:58,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:58,502 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1540971123, now seen corresponding path program 49 times [2021-06-05 20:32:58,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:58,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623458176] [2021-06-05 20:32:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:58,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:58,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623458176] [2021-06-05 20:32:58,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623458176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:58,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648237933] [2021-06-05 20:32:58,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:58,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:32:58,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:59,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648237933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:59,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:59,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:32:59,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451194427] [2021-06-05 20:32:59,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:32:59,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:32:59,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:32:59,092 INFO L87 Difference]: Start difference. First operand 223 states and 457 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:00,181 INFO L93 Difference]: Finished difference Result 428 states and 849 transitions. [2021-06-05 20:33:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:33:00,181 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:00,182 INFO L225 Difference]: With dead ends: 428 [2021-06-05 20:33:00,182 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 20:33:00,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1099.8ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:33:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 20:33:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 213. [2021-06-05 20:33:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.0330188679245285) internal successors, (431), 212 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 431 transitions. [2021-06-05 20:33:00,186 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 431 transitions. Word has length 21 [2021-06-05 20:33:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:00,186 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 431 transitions. [2021-06-05 20:33:00,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 431 transitions. [2021-06-05 20:33:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:00,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:00,186 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:00,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:00,401 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:00,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:00,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2124433851, now seen corresponding path program 50 times [2021-06-05 20:33:00,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:00,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767048482] [2021-06-05 20:33:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:00,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:00,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767048482] [2021-06-05 20:33:00,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767048482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:00,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985121845] [2021-06-05 20:33:00,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:00,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:00,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:01,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985121845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:01,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:01,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:01,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273334763] [2021-06-05 20:33:01,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:01,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:01,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:01,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:01,179 INFO L87 Difference]: Start difference. First operand 213 states and 431 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:01,877 INFO L93 Difference]: Finished difference Result 349 states and 690 transitions. [2021-06-05 20:33:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:33:01,878 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:01,878 INFO L225 Difference]: With dead ends: 349 [2021-06-05 20:33:01,878 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 20:33:01,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 985.9ms TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:33:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 20:33:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 209. [2021-06-05 20:33:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0288461538461537) internal successors, (422), 208 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 422 transitions. [2021-06-05 20:33:01,881 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 422 transitions. Word has length 21 [2021-06-05 20:33:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:01,881 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 422 transitions. [2021-06-05 20:33:01,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 422 transitions. [2021-06-05 20:33:01,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:01,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:01,882 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:02,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 20:33:02,089 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:02,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:02,089 INFO L82 PathProgramCache]: Analyzing trace with hash 395626935, now seen corresponding path program 51 times [2021-06-05 20:33:02,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:02,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803528589] [2021-06-05 20:33:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:02,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:02,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803528589] [2021-06-05 20:33:02,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803528589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:02,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469101395] [2021-06-05 20:33:02,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:02,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:33:02,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:02,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:02,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469101395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:02,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:02,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:02,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141604297] [2021-06-05 20:33:02,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:02,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:02,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:02,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:02,695 INFO L87 Difference]: Start difference. First operand 209 states and 422 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:03,496 INFO L93 Difference]: Finished difference Result 383 states and 758 transitions. [2021-06-05 20:33:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:33:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:03,497 INFO L225 Difference]: With dead ends: 383 [2021-06-05 20:33:03,497 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 20:33:03,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 893.4ms TimeCoverageRelationStatistics Valid=361, Invalid=2189, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:33:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 20:33:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 215. [2021-06-05 20:33:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.05607476635514) internal successors, (440), 214 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 440 transitions. [2021-06-05 20:33:03,500 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 440 transitions. Word has length 21 [2021-06-05 20:33:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:03,500 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 440 transitions. [2021-06-05 20:33:03,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 440 transitions. [2021-06-05 20:33:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:03,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:03,501 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:03,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 20:33:03,717 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:03,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:03,717 INFO L82 PathProgramCache]: Analyzing trace with hash 388304115, now seen corresponding path program 52 times [2021-06-05 20:33:03,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:03,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051140999] [2021-06-05 20:33:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:03,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:03,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051140999] [2021-06-05 20:33:03,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051140999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:03,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808522623] [2021-06-05 20:33:03,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:03,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:33:03,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:03,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:03,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:04,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808522623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:04,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:04,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:04,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358440058] [2021-06-05 20:33:04,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:04,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:04,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:04,372 INFO L87 Difference]: Start difference. First operand 215 states and 440 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:05,536 INFO L93 Difference]: Finished difference Result 417 states and 824 transitions. [2021-06-05 20:33:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:33:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:05,537 INFO L225 Difference]: With dead ends: 417 [2021-06-05 20:33:05,537 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 20:33:05,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1131.3ms TimeCoverageRelationStatistics Valid=532, Invalid=3008, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:33:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 20:33:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 217. [2021-06-05 20:33:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.064814814814815) internal successors, (446), 216 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 446 transitions. [2021-06-05 20:33:05,541 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 446 transitions. Word has length 21 [2021-06-05 20:33:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:05,541 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 446 transitions. [2021-06-05 20:33:05,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 446 transitions. [2021-06-05 20:33:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:05,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:05,542 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:05,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:05,761 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1795373837, now seen corresponding path program 53 times [2021-06-05 20:33:05,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:05,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923139636] [2021-06-05 20:33:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:05,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:05,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923139636] [2021-06-05 20:33:05,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923139636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:05,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48225993] [2021-06-05 20:33:05,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:05,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:33:05,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:05,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:05,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:06,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48225993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:06,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:06,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:06,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117357856] [2021-06-05 20:33:06,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:06,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:06,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:06,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:06,393 INFO L87 Difference]: Start difference. First operand 217 states and 446 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:07,473 INFO L93 Difference]: Finished difference Result 435 states and 855 transitions. [2021-06-05 20:33:07,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:33:07,473 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:07,474 INFO L225 Difference]: With dead ends: 435 [2021-06-05 20:33:07,474 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 20:33:07,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1126.8ms TimeCoverageRelationStatistics Valid=562, Invalid=3098, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:33:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 20:33:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 213. [2021-06-05 20:33:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.0377358490566038) internal successors, (432), 212 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 432 transitions. [2021-06-05 20:33:07,477 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 432 transitions. Word has length 21 [2021-06-05 20:33:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:07,477 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 432 transitions. [2021-06-05 20:33:07,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 432 transitions. [2021-06-05 20:33:07,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:07,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:07,477 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:07,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 20:33:07,678 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:07,678 INFO L82 PathProgramCache]: Analyzing trace with hash 909898995, now seen corresponding path program 54 times [2021-06-05 20:33:07,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:07,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193785081] [2021-06-05 20:33:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:07,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:07,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193785081] [2021-06-05 20:33:07,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193785081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:07,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965916139] [2021-06-05 20:33:07,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:07,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:33:07,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:07,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:08,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965916139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:08,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:08,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:08,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554391934] [2021-06-05 20:33:08,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:08,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:08,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:08,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:08,279 INFO L87 Difference]: Start difference. First operand 213 states and 432 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:09,070 INFO L93 Difference]: Finished difference Result 379 states and 750 transitions. [2021-06-05 20:33:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:33:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:09,071 INFO L225 Difference]: With dead ends: 379 [2021-06-05 20:33:09,071 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 20:33:09,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 938.3ms TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:33:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 20:33:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 215. [2021-06-05 20:33:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.032710280373832) internal successors, (435), 214 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 435 transitions. [2021-06-05 20:33:09,074 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 435 transitions. Word has length 21 [2021-06-05 20:33:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:09,074 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 435 transitions. [2021-06-05 20:33:09,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 435 transitions. [2021-06-05 20:33:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:09,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:09,075 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:09,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 20:33:09,277 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1217939799, now seen corresponding path program 55 times [2021-06-05 20:33:09,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:09,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767893754] [2021-06-05 20:33:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:09,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:09,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767893754] [2021-06-05 20:33:09,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767893754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:09,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453856056] [2021-06-05 20:33:09,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:09,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:09,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:09,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453856056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:09,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:09,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:09,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894268410] [2021-06-05 20:33:09,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:09,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:09,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:09,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:09,893 INFO L87 Difference]: Start difference. First operand 215 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:10,679 INFO L93 Difference]: Finished difference Result 387 states and 766 transitions. [2021-06-05 20:33:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:33:10,680 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:10,680 INFO L225 Difference]: With dead ends: 387 [2021-06-05 20:33:10,680 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 20:33:10,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 929.5ms TimeCoverageRelationStatistics Valid=372, Invalid=2280, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:33:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 20:33:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 220. [2021-06-05 20:33:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0547945205479454) internal successors, (450), 219 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 450 transitions. [2021-06-05 20:33:10,683 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 450 transitions. Word has length 21 [2021-06-05 20:33:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:10,683 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 450 transitions. [2021-06-05 20:33:10,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:10,683 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 450 transitions. [2021-06-05 20:33:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:10,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:10,683 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:10,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 20:33:10,889 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1225262619, now seen corresponding path program 56 times [2021-06-05 20:33:10,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:10,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562528668] [2021-06-05 20:33:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:11,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:11,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562528668] [2021-06-05 20:33:11,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562528668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:11,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146880906] [2021-06-05 20:33:11,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:11,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:11,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:11,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:11,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146880906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:11,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:11,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:11,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045219659] [2021-06-05 20:33:11,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:11,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:11,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:11,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:11,518 INFO L87 Difference]: Start difference. First operand 220 states and 450 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:12,616 INFO L93 Difference]: Finished difference Result 419 states and 828 transitions. [2021-06-05 20:33:12,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:33:12,617 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:12,617 INFO L225 Difference]: With dead ends: 419 [2021-06-05 20:33:12,617 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 20:33:12,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1131.2ms TimeCoverageRelationStatistics Valid=560, Invalid=3100, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:33:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 20:33:12,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 221. [2021-06-05 20:33:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.059090909090909) internal successors, (453), 220 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 453 transitions. [2021-06-05 20:33:12,620 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 453 transitions. Word has length 21 [2021-06-05 20:33:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:12,621 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 453 transitions. [2021-06-05 20:33:12,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 453 transitions. [2021-06-05 20:33:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:12,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:12,621 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:12,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:12,821 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash 886026725, now seen corresponding path program 57 times [2021-06-05 20:33:12,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:12,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267112747] [2021-06-05 20:33:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:12,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267112747] [2021-06-05 20:33:12,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267112747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394905155] [2021-06-05 20:33:12,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:13,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:33:13,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:13,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:13,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394905155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:13,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:13,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:13,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927503566] [2021-06-05 20:33:13,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:13,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:13,412 INFO L87 Difference]: Start difference. First operand 221 states and 453 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:14,499 INFO L93 Difference]: Finished difference Result 421 states and 835 transitions. [2021-06-05 20:33:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:33:14,499 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:14,500 INFO L225 Difference]: With dead ends: 421 [2021-06-05 20:33:14,500 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 20:33:14,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1096.1ms TimeCoverageRelationStatistics Valid=553, Invalid=3107, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:33:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 20:33:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 217. [2021-06-05 20:33:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0324074074074074) internal successors, (439), 216 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 439 transitions. [2021-06-05 20:33:14,503 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 439 transitions. Word has length 21 [2021-06-05 20:33:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:14,504 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 439 transitions. [2021-06-05 20:33:14,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 439 transitions. [2021-06-05 20:33:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:14,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:14,504 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:14,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 20:33:14,705 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2135889989, now seen corresponding path program 58 times [2021-06-05 20:33:14,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:14,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555026971] [2021-06-05 20:33:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:14,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:14,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555026971] [2021-06-05 20:33:14,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555026971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:14,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106722209] [2021-06-05 20:33:14,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:14,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:33:14,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:14,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:15,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106722209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:15,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:15,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:15,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109919786] [2021-06-05 20:33:15,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:15,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:15,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:15,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:15,314 INFO L87 Difference]: Start difference. First operand 217 states and 439 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:16,274 INFO L93 Difference]: Finished difference Result 388 states and 768 transitions. [2021-06-05 20:33:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:33:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:16,275 INFO L225 Difference]: With dead ends: 388 [2021-06-05 20:33:16,275 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 20:33:16,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 975.4ms TimeCoverageRelationStatistics Valid=411, Invalid=2451, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:33:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 20:33:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 223. [2021-06-05 20:33:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.054054054054054) internal successors, (456), 222 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 456 transitions. [2021-06-05 20:33:16,279 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 456 transitions. Word has length 21 [2021-06-05 20:33:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:16,279 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 456 transitions. [2021-06-05 20:33:16,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 456 transitions. [2021-06-05 20:33:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:16,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:16,280 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:16,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 20:33:16,502 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:16,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2143212809, now seen corresponding path program 59 times [2021-06-05 20:33:16,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:16,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076401638] [2021-06-05 20:33:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:16,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:16,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076401638] [2021-06-05 20:33:16,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076401638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:16,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347319013] [2021-06-05 20:33:16,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:16,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:16,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:16,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:17,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347319013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:17,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:17,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:17,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671550813] [2021-06-05 20:33:17,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:17,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:17,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:17,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:17,129 INFO L87 Difference]: Start difference. First operand 223 states and 456 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:18,280 INFO L93 Difference]: Finished difference Result 427 states and 844 transitions. [2021-06-05 20:33:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:33:18,280 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:18,281 INFO L225 Difference]: With dead ends: 427 [2021-06-05 20:33:18,281 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 20:33:18,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1174.5ms TimeCoverageRelationStatistics Valid=600, Invalid=3306, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:33:18,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 20:33:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 221. [2021-06-05 20:33:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.059090909090909) internal successors, (453), 220 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 453 transitions. [2021-06-05 20:33:18,284 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 453 transitions. Word has length 21 [2021-06-05 20:33:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:18,285 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 453 transitions. [2021-06-05 20:33:18,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 453 transitions. [2021-06-05 20:33:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:18,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:18,285 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:18,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 20:33:18,505 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash -31923465, now seen corresponding path program 60 times [2021-06-05 20:33:18,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:18,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332985525] [2021-06-05 20:33:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:18,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332985525] [2021-06-05 20:33:18,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332985525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813442176] [2021-06-05 20:33:18,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:18,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:33:18,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:18,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:19,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813442176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:19,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:19,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:19,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978753531] [2021-06-05 20:33:19,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:19,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:19,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:19,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:19,177 INFO L87 Difference]: Start difference. First operand 221 states and 453 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:20,239 INFO L93 Difference]: Finished difference Result 419 states and 831 transitions. [2021-06-05 20:33:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:33:20,239 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:20,240 INFO L225 Difference]: With dead ends: 419 [2021-06-05 20:33:20,240 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 20:33:20,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1142.6ms TimeCoverageRelationStatistics Valid=555, Invalid=2985, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:33:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 20:33:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 215. [2021-06-05 20:33:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.032710280373832) internal successors, (435), 214 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 435 transitions. [2021-06-05 20:33:20,243 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 435 transitions. Word has length 21 [2021-06-05 20:33:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:20,243 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 435 transitions. [2021-06-05 20:33:20,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 435 transitions. [2021-06-05 20:33:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:20,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:20,243 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:20,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:20,457 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2016202425, now seen corresponding path program 61 times [2021-06-05 20:33:20,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:20,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439591475] [2021-06-05 20:33:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:20,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:20,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439591475] [2021-06-05 20:33:20,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439591475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:20,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824448327] [2021-06-05 20:33:20,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:20,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:21,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824448327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:21,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:21,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:21,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67009753] [2021-06-05 20:33:21,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:21,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:21,049 INFO L87 Difference]: Start difference. First operand 215 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:21,721 INFO L93 Difference]: Finished difference Result 385 states and 763 transitions. [2021-06-05 20:33:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:33:21,721 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:21,722 INFO L225 Difference]: With dead ends: 385 [2021-06-05 20:33:21,722 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 20:33:21,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 819.8ms TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:33:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 20:33:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 221. [2021-06-05 20:33:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.036363636363636) internal successors, (448), 220 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 448 transitions. [2021-06-05 20:33:21,725 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 448 transitions. Word has length 21 [2021-06-05 20:33:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:21,725 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 448 transitions. [2021-06-05 20:33:21,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 448 transitions. [2021-06-05 20:33:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:21,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:21,725 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:21,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:21,926 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash -873292813, now seen corresponding path program 62 times [2021-06-05 20:33:21,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:21,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598923946] [2021-06-05 20:33:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:22,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:22,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598923946] [2021-06-05 20:33:22,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598923946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:22,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230784898] [2021-06-05 20:33:22,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:22,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:22,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:22,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:22,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:22,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230784898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:22,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:22,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:22,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872061304] [2021-06-05 20:33:22,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:22,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:22,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:22,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:22,516 INFO L87 Difference]: Start difference. First operand 221 states and 448 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:23,219 INFO L93 Difference]: Finished difference Result 392 states and 774 transitions. [2021-06-05 20:33:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:33:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:23,220 INFO L225 Difference]: With dead ends: 392 [2021-06-05 20:33:23,220 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 20:33:23,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 827.3ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:33:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 20:33:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 223. [2021-06-05 20:33:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.036036036036036) internal successors, (452), 222 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 452 transitions. [2021-06-05 20:33:23,223 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 452 transitions. Word has length 21 [2021-06-05 20:33:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:23,223 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 452 transitions. [2021-06-05 20:33:23,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 452 transitions. [2021-06-05 20:33:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:23,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:23,223 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:23,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:23,424 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:23,424 INFO L82 PathProgramCache]: Analyzing trace with hash 18881893, now seen corresponding path program 63 times [2021-06-05 20:33:23,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:23,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217088369] [2021-06-05 20:33:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:23,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:23,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217088369] [2021-06-05 20:33:23,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217088369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:23,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672981340] [2021-06-05 20:33:23,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:23,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:33:23,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:23,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:23,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:24,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672981340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:24,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:24,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:24,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390803568] [2021-06-05 20:33:24,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:24,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:24,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:24,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:24,064 INFO L87 Difference]: Start difference. First operand 223 states and 452 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:24,775 INFO L93 Difference]: Finished difference Result 390 states and 772 transitions. [2021-06-05 20:33:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:33:24,776 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:24,776 INFO L225 Difference]: With dead ends: 390 [2021-06-05 20:33:24,776 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 20:33:24,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 864.1ms TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:33:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 20:33:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 225. [2021-06-05 20:33:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-06-05 20:33:24,779 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 21 [2021-06-05 20:33:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:24,779 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-06-05 20:33:24,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-06-05 20:33:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:24,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:24,780 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:24,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 20:33:24,980 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:24,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1836800671, now seen corresponding path program 64 times [2021-06-05 20:33:24,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:24,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963660165] [2021-06-05 20:33:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:25,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963660165] [2021-06-05 20:33:25,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963660165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575317739] [2021-06-05 20:33:25,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:25,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:33:25,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:25,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:25,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:25,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575317739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:25,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:25,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:25,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87546231] [2021-06-05 20:33:25,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:25,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:25,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:25,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:25,563 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:26,432 INFO L93 Difference]: Finished difference Result 399 states and 787 transitions. [2021-06-05 20:33:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:33:26,433 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:26,434 INFO L225 Difference]: With dead ends: 399 [2021-06-05 20:33:26,434 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 20:33:26,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 922.5ms TimeCoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:33:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 20:33:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 219. [2021-06-05 20:33:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.036697247706422) internal successors, (444), 218 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 444 transitions. [2021-06-05 20:33:26,437 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 444 transitions. Word has length 21 [2021-06-05 20:33:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:26,438 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 444 transitions. [2021-06-05 20:33:26,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 444 transitions. [2021-06-05 20:33:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:26,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:26,438 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:26,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 20:33:26,649 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash 252308087, now seen corresponding path program 65 times [2021-06-05 20:33:26,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:26,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683750826] [2021-06-05 20:33:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:26,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:26,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683750826] [2021-06-05 20:33:26,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683750826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:26,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928221286] [2021-06-05 20:33:26,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:26,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:26,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:26,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:27,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928221286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:27,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:27,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:27,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674690578] [2021-06-05 20:33:27,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:27,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:27,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:27,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:27,231 INFO L87 Difference]: Start difference. First operand 219 states and 444 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:27,996 INFO L93 Difference]: Finished difference Result 402 states and 796 transitions. [2021-06-05 20:33:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:33:27,996 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:27,998 INFO L225 Difference]: With dead ends: 402 [2021-06-05 20:33:27,998 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 20:33:27,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:33:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 20:33:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 223. [2021-06-05 20:33:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.0405405405405403) internal successors, (453), 222 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 453 transitions. [2021-06-05 20:33:28,002 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 453 transitions. Word has length 21 [2021-06-05 20:33:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:28,002 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 453 transitions. [2021-06-05 20:33:28,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 453 transitions. [2021-06-05 20:33:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:28,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:28,003 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:28,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 20:33:28,225 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1144482793, now seen corresponding path program 66 times [2021-06-05 20:33:28,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:28,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263117229] [2021-06-05 20:33:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:28,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:28,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263117229] [2021-06-05 20:33:28,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263117229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:28,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357408458] [2021-06-05 20:33:28,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:28,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:33:28,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:28,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:28,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:28,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357408458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:28,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:28,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:28,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129124796] [2021-06-05 20:33:28,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:28,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:28,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:28,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:28,833 INFO L87 Difference]: Start difference. First operand 223 states and 453 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:29,524 INFO L93 Difference]: Finished difference Result 405 states and 801 transitions. [2021-06-05 20:33:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:33:29,524 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:29,525 INFO L225 Difference]: With dead ends: 405 [2021-06-05 20:33:29,525 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 20:33:29,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 852.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:33:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 20:33:29,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 225. [2021-06-05 20:33:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0401785714285716) internal successors, (457), 224 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 457 transitions. [2021-06-05 20:33:29,527 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 457 transitions. Word has length 21 [2021-06-05 20:33:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:29,527 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 457 transitions. [2021-06-05 20:33:29,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 457 transitions. [2021-06-05 20:33:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:29,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:29,528 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:29,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 20:33:29,728 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash -711199771, now seen corresponding path program 67 times [2021-06-05 20:33:29,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:29,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041095715] [2021-06-05 20:33:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:29,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:29,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041095715] [2021-06-05 20:33:29,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041095715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:29,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103531471] [2021-06-05 20:33:29,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:29,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:29,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:30,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103531471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:30,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:30,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:30,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895879001] [2021-06-05 20:33:30,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:30,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:30,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:30,308 INFO L87 Difference]: Start difference. First operand 225 states and 457 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:31,414 INFO L93 Difference]: Finished difference Result 415 states and 817 transitions. [2021-06-05 20:33:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:33:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:31,415 INFO L225 Difference]: With dead ends: 415 [2021-06-05 20:33:31,415 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 20:33:31,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1113.9ms TimeCoverageRelationStatistics Valid=420, Invalid=2886, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:33:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 20:33:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 221. [2021-06-05 20:33:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.040909090909091) internal successors, (449), 220 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 449 transitions. [2021-06-05 20:33:31,418 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 449 transitions. Word has length 21 [2021-06-05 20:33:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:31,418 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 449 transitions. [2021-06-05 20:33:31,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 449 transitions. [2021-06-05 20:33:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:31,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:31,418 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:31,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 20:33:31,619 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:31,619 INFO L82 PathProgramCache]: Analyzing trace with hash 904036645, now seen corresponding path program 68 times [2021-06-05 20:33:31,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:31,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848218949] [2021-06-05 20:33:31,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:31,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:31,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848218949] [2021-06-05 20:33:31,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848218949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:31,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236644185] [2021-06-05 20:33:31,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:31,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:31,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:31,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:31,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236644185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:32,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:32,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:32,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010041555] [2021-06-05 20:33:32,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:32,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:32,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:32,202 INFO L87 Difference]: Start difference. First operand 221 states and 449 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:33,000 INFO L93 Difference]: Finished difference Result 400 states and 793 transitions. [2021-06-05 20:33:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:33:33,000 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:33,001 INFO L225 Difference]: With dead ends: 400 [2021-06-05 20:33:33,001 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 20:33:33,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 899.9ms TimeCoverageRelationStatistics Valid=328, Invalid=2324, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:33:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 20:33:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 225. [2021-06-05 20:33:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.044642857142857) internal successors, (458), 224 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 458 transitions. [2021-06-05 20:33:33,004 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 458 transitions. Word has length 21 [2021-06-05 20:33:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:33,004 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 458 transitions. [2021-06-05 20:33:33,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 458 transitions. [2021-06-05 20:33:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:33,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:33,004 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:33,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:33,205 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash -951645919, now seen corresponding path program 69 times [2021-06-05 20:33:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:33,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130402337] [2021-06-05 20:33:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:33,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:33,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130402337] [2021-06-05 20:33:33,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130402337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:33,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312951898] [2021-06-05 20:33:33,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:33,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:33:33,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:33,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:33,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312951898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:33,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:33,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:33,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649823428] [2021-06-05 20:33:33,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:33,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:33,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:33,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:33,786 INFO L87 Difference]: Start difference. First operand 225 states and 458 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:34,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:34,730 INFO L93 Difference]: Finished difference Result 408 states and 806 transitions. [2021-06-05 20:33:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:33:34,731 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:34,731 INFO L225 Difference]: With dead ends: 408 [2021-06-05 20:33:34,731 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 20:33:34,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 982.3ms TimeCoverageRelationStatistics Valid=380, Invalid=2590, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:33:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 20:33:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 223. [2021-06-05 20:33:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.045045045045045) internal successors, (454), 222 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 454 transitions. [2021-06-05 20:33:34,734 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 454 transitions. Word has length 21 [2021-06-05 20:33:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:34,734 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 454 transitions. [2021-06-05 20:33:34,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 454 transitions. [2021-06-05 20:33:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:34,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:34,734 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:34,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 20:33:34,935 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash -207927007, now seen corresponding path program 70 times [2021-06-05 20:33:34,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:34,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53688990] [2021-06-05 20:33:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:35,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:35,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53688990] [2021-06-05 20:33:35,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53688990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:35,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410986334] [2021-06-05 20:33:35,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:35,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:33:35,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:35,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:35,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:35,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410986334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:35,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:35,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:35,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783102917] [2021-06-05 20:33:35,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:35,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:35,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:35,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:35,545 INFO L87 Difference]: Start difference. First operand 223 states and 454 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:36,822 INFO L93 Difference]: Finished difference Result 436 states and 866 transitions. [2021-06-05 20:33:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:33:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:36,822 INFO L225 Difference]: With dead ends: 436 [2021-06-05 20:33:36,822 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 20:33:36,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1107.7ms TimeCoverageRelationStatistics Valid=437, Invalid=2869, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:33:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 20:33:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 220. [2021-06-05 20:33:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0319634703196345) internal successors, (445), 219 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 445 transitions. [2021-06-05 20:33:36,825 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 445 transitions. Word has length 21 [2021-06-05 20:33:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:36,825 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 445 transitions. [2021-06-05 20:33:36,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 445 transitions. [2021-06-05 20:33:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:36,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:36,826 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:37,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:37,026 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:37,026 INFO L82 PathProgramCache]: Analyzing trace with hash -774452025, now seen corresponding path program 71 times [2021-06-05 20:33:37,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:37,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791153596] [2021-06-05 20:33:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:37,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:37,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791153596] [2021-06-05 20:33:37,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791153596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:37,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609720803] [2021-06-05 20:33:37,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:37,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:37,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:37,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:37,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:37,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609720803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:37,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:37,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:37,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586382401] [2021-06-05 20:33:37,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:37,620 INFO L87 Difference]: Start difference. First operand 220 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:38,610 INFO L93 Difference]: Finished difference Result 393 states and 782 transitions. [2021-06-05 20:33:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:33:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:38,611 INFO L225 Difference]: With dead ends: 393 [2021-06-05 20:33:38,611 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 20:33:38,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 965.9ms TimeCoverageRelationStatistics Valid=370, Invalid=2492, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:33:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 20:33:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 221. [2021-06-05 20:33:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.0318181818181817) internal successors, (447), 220 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 447 transitions. [2021-06-05 20:33:38,614 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 447 transitions. Word has length 21 [2021-06-05 20:33:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:38,614 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 447 transitions. [2021-06-05 20:33:38,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 447 transitions. [2021-06-05 20:33:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:38,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:38,615 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:38,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:38,815 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1692402215, now seen corresponding path program 72 times [2021-06-05 20:33:38,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:38,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789030904] [2021-06-05 20:33:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:38,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:38,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789030904] [2021-06-05 20:33:38,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789030904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:38,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498253503] [2021-06-05 20:33:38,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:39,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:33:39,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:39,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:39,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498253503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:39,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:39,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:39,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109432858] [2021-06-05 20:33:39,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:39,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:39,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:39,410 INFO L87 Difference]: Start difference. First operand 221 states and 447 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:40,578 INFO L93 Difference]: Finished difference Result 400 states and 796 transitions. [2021-06-05 20:33:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:33:40,579 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:40,579 INFO L225 Difference]: With dead ends: 400 [2021-06-05 20:33:40,579 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 20:33:40,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1064.3ms TimeCoverageRelationStatistics Valid=421, Invalid=2771, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:33:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 20:33:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 217. [2021-06-05 20:33:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0324074074074074) internal successors, (439), 216 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 439 transitions. [2021-06-05 20:33:40,582 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 439 transitions. Word has length 21 [2021-06-05 20:33:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:40,582 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 439 transitions. [2021-06-05 20:33:40,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 439 transitions. [2021-06-05 20:33:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:40,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:40,582 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:40,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 20:33:40,783 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:40,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:40,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1880533957, now seen corresponding path program 73 times [2021-06-05 20:33:40,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:40,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147842786] [2021-06-05 20:33:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:40,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:40,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147842786] [2021-06-05 20:33:40,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147842786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:40,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156544891] [2021-06-05 20:33:40,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:40,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:41,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156544891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:41,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:41,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:41,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794309496] [2021-06-05 20:33:41,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:41,392 INFO L87 Difference]: Start difference. First operand 217 states and 439 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:42,002 INFO L93 Difference]: Finished difference Result 370 states and 732 transitions. [2021-06-05 20:33:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:33:42,002 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:42,002 INFO L225 Difference]: With dead ends: 370 [2021-06-05 20:33:42,003 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 20:33:42,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:33:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 20:33:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 222. [2021-06-05 20:33:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.0361990950226243) internal successors, (450), 221 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 450 transitions. [2021-06-05 20:33:42,005 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 450 transitions. Word has length 21 [2021-06-05 20:33:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:42,005 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 450 transitions. [2021-06-05 20:33:42,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 450 transitions. [2021-06-05 20:33:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:42,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:42,006 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:42,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:42,206 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:42,206 INFO L82 PathProgramCache]: Analyzing trace with hash -988359251, now seen corresponding path program 74 times [2021-06-05 20:33:42,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:42,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581018805] [2021-06-05 20:33:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:42,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:42,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581018805] [2021-06-05 20:33:42,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581018805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:42,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463509472] [2021-06-05 20:33:42,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:42,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:42,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:42,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:42,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463509472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:42,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:42,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:42,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189829615] [2021-06-05 20:33:42,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:42,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:42,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:42,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:42,839 INFO L87 Difference]: Start difference. First operand 222 states and 450 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:43,549 INFO L93 Difference]: Finished difference Result 373 states and 737 transitions. [2021-06-05 20:33:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:33:43,549 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:43,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:43,550 INFO L225 Difference]: With dead ends: 373 [2021-06-05 20:33:43,550 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 20:33:43,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 838.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:33:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 20:33:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 224. [2021-06-05 20:33:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0358744394618835) internal successors, (454), 223 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 454 transitions. [2021-06-05 20:33:43,552 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 454 transitions. Word has length 21 [2021-06-05 20:33:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:43,552 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 454 transitions. [2021-06-05 20:33:43,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 454 transitions. [2021-06-05 20:33:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:43,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:43,553 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:43,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:43,753 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:43,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1450925481, now seen corresponding path program 75 times [2021-06-05 20:33:43,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:43,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621058175] [2021-06-05 20:33:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:43,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:43,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621058175] [2021-06-05 20:33:43,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621058175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:43,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423015074] [2021-06-05 20:33:43,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:43,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:33:43,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:43,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:43,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:44,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423015074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:44,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:44,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:44,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225941591] [2021-06-05 20:33:44,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:44,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:44,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:44,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:44,351 INFO L87 Difference]: Start difference. First operand 224 states and 454 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:45,391 INFO L93 Difference]: Finished difference Result 382 states and 752 transitions. [2021-06-05 20:33:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:33:45,391 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:45,392 INFO L225 Difference]: With dead ends: 382 [2021-06-05 20:33:45,392 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 20:33:45,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1109.3ms TimeCoverageRelationStatistics Valid=412, Invalid=2780, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:33:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 20:33:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 220. [2021-06-05 20:33:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.036529680365297) internal successors, (446), 219 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 446 transitions. [2021-06-05 20:33:45,395 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 446 transitions. Word has length 21 [2021-06-05 20:33:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:45,395 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 446 transitions. [2021-06-05 20:33:45,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:45,395 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 446 transitions. [2021-06-05 20:33:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:45,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:45,395 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:45,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 20:33:45,596 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:45,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1228805399, now seen corresponding path program 76 times [2021-06-05 20:33:45,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:45,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317672724] [2021-06-05 20:33:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:45,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:45,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317672724] [2021-06-05 20:33:45,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317672724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:45,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135844599] [2021-06-05 20:33:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:45,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:33:45,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:45,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:46,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135844599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:46,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:46,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:46,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313740410] [2021-06-05 20:33:46,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:46,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:46,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:46,208 INFO L87 Difference]: Start difference. First operand 220 states and 446 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:47,063 INFO L93 Difference]: Finished difference Result 380 states and 751 transitions. [2021-06-05 20:33:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:33:47,063 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:47,064 INFO L225 Difference]: With dead ends: 380 [2021-06-05 20:33:47,064 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 20:33:47,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 943.9ms TimeCoverageRelationStatistics Valid=337, Invalid=2315, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:33:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 20:33:47,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 224. [2021-06-05 20:33:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-06-05 20:33:47,066 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 21 [2021-06-05 20:33:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:47,067 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-06-05 20:33:47,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-06-05 20:33:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:47,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:47,067 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:47,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:47,267 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:47,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1210479333, now seen corresponding path program 77 times [2021-06-05 20:33:47,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:47,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203726637] [2021-06-05 20:33:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:47,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203726637] [2021-06-05 20:33:47,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203726637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581127560] [2021-06-05 20:33:47,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:47,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:47,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:47,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:47,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581127560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:47,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:47,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:47,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861414641] [2021-06-05 20:33:47,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:47,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:47,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:47,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:47,866 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:48,838 INFO L93 Difference]: Finished difference Result 393 states and 768 transitions. [2021-06-05 20:33:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:33:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:48,839 INFO L225 Difference]: With dead ends: 393 [2021-06-05 20:33:48,839 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 20:33:48,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1016.5ms TimeCoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:33:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 20:33:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 227. [2021-06-05 20:33:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.0442477876106193) internal successors, (462), 226 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 462 transitions. [2021-06-05 20:33:48,842 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 462 transitions. Word has length 21 [2021-06-05 20:33:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:48,842 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 462 transitions. [2021-06-05 20:33:48,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 462 transitions. [2021-06-05 20:33:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:48,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:48,842 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:49,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 20:33:49,043 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1954198245, now seen corresponding path program 78 times [2021-06-05 20:33:49,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:49,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103523463] [2021-06-05 20:33:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:49,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:49,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103523463] [2021-06-05 20:33:49,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103523463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:49,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988671491] [2021-06-05 20:33:49,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:49,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:33:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:49,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:49,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988671491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:49,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:49,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:49,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153268688] [2021-06-05 20:33:49,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:49,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:49,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:49,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:49,645 INFO L87 Difference]: Start difference. First operand 227 states and 462 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:50,913 INFO L93 Difference]: Finished difference Result 421 states and 828 transitions. [2021-06-05 20:33:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:33:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:50,914 INFO L225 Difference]: With dead ends: 421 [2021-06-05 20:33:50,914 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 20:33:50,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1142.9ms TimeCoverageRelationStatistics Valid=459, Invalid=2847, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:33:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 20:33:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 225. [2021-06-05 20:33:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-06-05 20:33:50,917 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 21 [2021-06-05 20:33:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:50,917 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-06-05 20:33:50,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-06-05 20:33:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:50,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:50,917 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:51,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:51,121 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:51,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1830572367, now seen corresponding path program 79 times [2021-06-05 20:33:51,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:51,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601379749] [2021-06-05 20:33:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:51,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:51,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601379749] [2021-06-05 20:33:51,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601379749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:51,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412128954] [2021-06-05 20:33:51,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:51,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:51,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412128954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:51,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:51,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:51,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251753337] [2021-06-05 20:33:51,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:51,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:51,741 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:52,769 INFO L93 Difference]: Finished difference Result 393 states and 782 transitions. [2021-06-05 20:33:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:33:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:52,770 INFO L225 Difference]: With dead ends: 393 [2021-06-05 20:33:52,770 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 20:33:52,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1042.1ms TimeCoverageRelationStatistics Valid=412, Invalid=2558, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:33:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 20:33:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 226. [2021-06-05 20:33:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.0355555555555553) internal successors, (458), 225 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 458 transitions. [2021-06-05 20:33:52,774 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 458 transitions. Word has length 21 [2021-06-05 20:33:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:52,774 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 458 transitions. [2021-06-05 20:33:52,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 458 transitions. [2021-06-05 20:33:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:52,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:52,775 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:52,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 20:33:52,977 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash 912622177, now seen corresponding path program 80 times [2021-06-05 20:33:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:52,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123036769] [2021-06-05 20:33:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:53,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123036769] [2021-06-05 20:33:53,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123036769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922495361] [2021-06-05 20:33:53,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:53,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:53,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:53,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:53,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:53,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922495361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:53,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:53,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:53,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143002020] [2021-06-05 20:33:53,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:53,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:53,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:53,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:53,587 INFO L87 Difference]: Start difference. First operand 226 states and 458 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:54,622 INFO L93 Difference]: Finished difference Result 400 states and 796 transitions. [2021-06-05 20:33:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:33:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:54,623 INFO L225 Difference]: With dead ends: 400 [2021-06-05 20:33:54,623 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 20:33:54,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1121.9ms TimeCoverageRelationStatistics Valid=464, Invalid=2842, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:33:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 20:33:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 223. [2021-06-05 20:33:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.036036036036036) internal successors, (452), 222 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 452 transitions. [2021-06-05 20:33:54,626 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 452 transitions. Word has length 21 [2021-06-05 20:33:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:54,626 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 452 transitions. [2021-06-05 20:33:54,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:54,627 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 452 transitions. [2021-06-05 20:33:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:54,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:54,627 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:54,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:54,827 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:54,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:54,828 INFO L82 PathProgramCache]: Analyzing trace with hash -694915867, now seen corresponding path program 81 times [2021-06-05 20:33:54,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:54,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940464926] [2021-06-05 20:33:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:55,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:55,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940464926] [2021-06-05 20:33:55,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940464926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:55,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80165105] [2021-06-05 20:33:55,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:55,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:33:55,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:55,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:55,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:55,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80165105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:55,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:55,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:55,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009629549] [2021-06-05 20:33:55,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:55,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:55,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:55,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:55,445 INFO L87 Difference]: Start difference. First operand 223 states and 452 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:56,136 INFO L93 Difference]: Finished difference Result 364 states and 721 transitions. [2021-06-05 20:33:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:33:56,137 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:56,137 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:33:56,137 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:33:56,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 861.1ms TimeCoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:33:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:33:56,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 219. [2021-06-05 20:33:56,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.032110091743119) internal successors, (443), 218 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 443 transitions. [2021-06-05 20:33:56,140 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 443 transitions. Word has length 21 [2021-06-05 20:33:56,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:56,140 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 443 transitions. [2021-06-05 20:33:56,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:56,140 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 443 transitions. [2021-06-05 20:33:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:56,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:56,140 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:56,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 20:33:56,345 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:56,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1871244513, now seen corresponding path program 82 times [2021-06-05 20:33:56,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:56,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893693967] [2021-06-05 20:33:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:56,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:56,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893693967] [2021-06-05 20:33:56,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893693967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:56,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994179001] [2021-06-05 20:33:56,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:56,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:33:56,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:56,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:56,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:56,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994179001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:56,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:56,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:56,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975153585] [2021-06-05 20:33:56,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:56,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:56,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:56,971 INFO L87 Difference]: Start difference. First operand 219 states and 443 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:57,998 INFO L93 Difference]: Finished difference Result 390 states and 776 transitions. [2021-06-05 20:33:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:33:57,998 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:57,999 INFO L225 Difference]: With dead ends: 390 [2021-06-05 20:33:57,999 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 20:33:57,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 979.3ms TimeCoverageRelationStatistics Valid=414, Invalid=2448, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:33:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 20:33:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 220. [2021-06-05 20:33:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0319634703196345) internal successors, (445), 219 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 445 transitions. [2021-06-05 20:33:58,001 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 445 transitions. Word has length 21 [2021-06-05 20:33:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:58,001 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 445 transitions. [2021-06-05 20:33:58,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 445 transitions. [2021-06-05 20:33:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:58,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:58,002 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:58,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:58,202 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash 257677779, now seen corresponding path program 83 times [2021-06-05 20:33:58,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:58,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114069750] [2021-06-05 20:33:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:58,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:58,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114069750] [2021-06-05 20:33:58,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114069750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:58,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483878845] [2021-06-05 20:33:58,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:58,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:58,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:58,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:33:58,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:58,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483878845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:58,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:58,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:33:58,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969030124] [2021-06-05 20:33:58,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:33:58,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:58,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:33:58,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:33:58,841 INFO L87 Difference]: Start difference. First operand 220 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:59,845 INFO L93 Difference]: Finished difference Result 391 states and 778 transitions. [2021-06-05 20:33:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:33:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:33:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:59,846 INFO L225 Difference]: With dead ends: 391 [2021-06-05 20:33:59,846 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 20:33:59,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1041.5ms TimeCoverageRelationStatistics Valid=437, Invalid=2533, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:33:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 20:33:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 221. [2021-06-05 20:33:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.0318181818181817) internal successors, (447), 220 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 447 transitions. [2021-06-05 20:33:59,849 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 447 transitions. Word has length 21 [2021-06-05 20:33:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:59,849 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 447 transitions. [2021-06-05 20:33:59,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 447 transitions. [2021-06-05 20:33:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:33:59,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:59,849 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:00,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:00,069 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:00,069 INFO L82 PathProgramCache]: Analyzing trace with hash -660272411, now seen corresponding path program 84 times [2021-06-05 20:34:00,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:00,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482330635] [2021-06-05 20:34:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:00,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482330635] [2021-06-05 20:34:00,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482330635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023673795] [2021-06-05 20:34:00,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:00,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:34:00,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:00,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:00,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023673795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:00,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:00,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:00,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46693673] [2021-06-05 20:34:00,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:00,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:00,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:00,677 INFO L87 Difference]: Start difference. First operand 221 states and 447 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:01,675 INFO L93 Difference]: Finished difference Result 395 states and 786 transitions. [2021-06-05 20:34:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:34:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:01,675 INFO L225 Difference]: With dead ends: 395 [2021-06-05 20:34:01,675 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 20:34:01,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1096.7ms TimeCoverageRelationStatistics Valid=493, Invalid=2813, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:34:01,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 20:34:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 216. [2021-06-05 20:34:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0325581395348835) internal successors, (437), 215 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 437 transitions. [2021-06-05 20:34:01,678 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 437 transitions. Word has length 21 [2021-06-05 20:34:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:01,678 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 437 transitions. [2021-06-05 20:34:01,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 437 transitions. [2021-06-05 20:34:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:01,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:01,678 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:01,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:01,879 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1141499631, now seen corresponding path program 85 times [2021-06-05 20:34:01,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:01,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350060747] [2021-06-05 20:34:01,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:02,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350060747] [2021-06-05 20:34:02,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350060747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619708527] [2021-06-05 20:34:02,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:02,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:02,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:02,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619708527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:02,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:02,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:02,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034128487] [2021-06-05 20:34:02,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:02,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:02,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:02,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:02,482 INFO L87 Difference]: Start difference. First operand 216 states and 437 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:03,107 INFO L93 Difference]: Finished difference Result 367 states and 726 transitions. [2021-06-05 20:34:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:34:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:03,107 INFO L225 Difference]: With dead ends: 367 [2021-06-05 20:34:03,108 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 20:34:03,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:34:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 20:34:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 222. [2021-06-05 20:34:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.0361990950226243) internal successors, (450), 221 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 450 transitions. [2021-06-05 20:34:03,110 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 450 transitions. Word has length 21 [2021-06-05 20:34:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:03,110 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 450 transitions. [2021-06-05 20:34:03,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 450 transitions. [2021-06-05 20:34:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:03,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:03,111 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:03,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 20:34:03,311 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2033674337, now seen corresponding path program 86 times [2021-06-05 20:34:03,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:03,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515903427] [2021-06-05 20:34:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:03,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515903427] [2021-06-05 20:34:03,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515903427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487596722] [2021-06-05 20:34:03,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:03,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:03,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:03,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:03,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:03,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487596722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:03,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:03,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:03,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343453756] [2021-06-05 20:34:03,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:03,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:03,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:03,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:03,926 INFO L87 Difference]: Start difference. First operand 222 states and 450 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:04,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:04,633 INFO L93 Difference]: Finished difference Result 370 states and 731 transitions. [2021-06-05 20:34:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:34:04,633 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:04,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:04,634 INFO L225 Difference]: With dead ends: 370 [2021-06-05 20:34:04,634 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 20:34:04,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 840.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:34:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 20:34:04,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 224. [2021-06-05 20:34:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0358744394618835) internal successors, (454), 223 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 454 transitions. [2021-06-05 20:34:04,636 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 454 transitions. Word has length 21 [2021-06-05 20:34:04,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:04,637 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 454 transitions. [2021-06-05 20:34:04,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:04,637 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 454 transitions. [2021-06-05 20:34:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:04,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:04,637 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:04,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 20:34:04,860 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:04,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:04,860 INFO L82 PathProgramCache]: Analyzing trace with hash 177991773, now seen corresponding path program 87 times [2021-06-05 20:34:04,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:04,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867226025] [2021-06-05 20:34:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:05,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:05,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867226025] [2021-06-05 20:34:05,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867226025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:05,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937795520] [2021-06-05 20:34:05,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:05,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:34:05,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:05,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:05,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937795520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:05,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:05,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:05,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161902344] [2021-06-05 20:34:05,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:05,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:05,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:05,467 INFO L87 Difference]: Start difference. First operand 224 states and 454 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:06,578 INFO L93 Difference]: Finished difference Result 393 states and 769 transitions. [2021-06-05 20:34:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:34:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:06,579 INFO L225 Difference]: With dead ends: 393 [2021-06-05 20:34:06,579 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 20:34:06,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1123.2ms TimeCoverageRelationStatistics Valid=425, Invalid=2881, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:34:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 20:34:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 228. [2021-06-05 20:34:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0440528634361232) internal successors, (464), 227 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 464 transitions. [2021-06-05 20:34:06,582 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 464 transitions. Word has length 21 [2021-06-05 20:34:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:06,582 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 464 transitions. [2021-06-05 20:34:06,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:06,582 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 464 transitions. [2021-06-05 20:34:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:06,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:06,583 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:06,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 20:34:06,783 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:06,784 INFO L82 PathProgramCache]: Analyzing trace with hash 170668953, now seen corresponding path program 88 times [2021-06-05 20:34:06,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:06,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655070802] [2021-06-05 20:34:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:06,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:06,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655070802] [2021-06-05 20:34:06,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655070802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:06,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237659721] [2021-06-05 20:34:06,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:06,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:34:06,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:06,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:07,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237659721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:07,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:07,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:07,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369390620] [2021-06-05 20:34:07,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:07,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:07,380 INFO L87 Difference]: Start difference. First operand 228 states and 464 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:08,457 INFO L93 Difference]: Finished difference Result 421 states and 828 transitions. [2021-06-05 20:34:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:34:08,457 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:08,458 INFO L225 Difference]: With dead ends: 421 [2021-06-05 20:34:08,458 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 20:34:08,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1100.7ms TimeCoverageRelationStatistics Valid=456, Invalid=2966, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:34:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 20:34:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 224. [2021-06-05 20:34:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-06-05 20:34:08,461 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 21 [2021-06-05 20:34:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:08,461 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-06-05 20:34:08,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:08,461 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-06-05 20:34:08,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:08,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:08,461 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:08,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 20:34:08,662 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:08,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:08,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1793228189, now seen corresponding path program 89 times [2021-06-05 20:34:08,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:08,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930560465] [2021-06-05 20:34:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:08,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:08,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930560465] [2021-06-05 20:34:08,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930560465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:08,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389505975] [2021-06-05 20:34:08,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:08,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:08,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:08,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:08,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:09,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389505975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:09,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:09,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:09,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043080233] [2021-06-05 20:34:09,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:09,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:09,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:09,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:09,328 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:10,177 INFO L93 Difference]: Finished difference Result 381 states and 754 transitions. [2021-06-05 20:34:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:34:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:10,178 INFO L225 Difference]: With dead ends: 381 [2021-06-05 20:34:10,178 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 20:34:10,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 962.6ms TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:34:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 20:34:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 228. [2021-06-05 20:34:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0440528634361232) internal successors, (464), 227 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 464 transitions. [2021-06-05 20:34:10,181 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 464 transitions. Word has length 21 [2021-06-05 20:34:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:10,181 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 464 transitions. [2021-06-05 20:34:10,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 464 transitions. [2021-06-05 20:34:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:10,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:10,181 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:10,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 20:34:10,382 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash -62454375, now seen corresponding path program 90 times [2021-06-05 20:34:10,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:10,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498219119] [2021-06-05 20:34:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:10,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:10,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498219119] [2021-06-05 20:34:10,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498219119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:10,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759464014] [2021-06-05 20:34:10,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:10,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:34:10,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:10,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:10,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759464014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:10,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:10,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:10,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581819368] [2021-06-05 20:34:10,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:10,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:10,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:10,989 INFO L87 Difference]: Start difference. First operand 228 states and 464 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:12,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:12,106 INFO L93 Difference]: Finished difference Result 408 states and 794 transitions. [2021-06-05 20:34:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:34:12,106 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:12,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:12,106 INFO L225 Difference]: With dead ends: 408 [2021-06-05 20:34:12,106 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 20:34:12,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1025.6ms TimeCoverageRelationStatistics Valid=403, Invalid=2677, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:34:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 20:34:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 238. [2021-06-05 20:34:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.0548523206751055) internal successors, (487), 237 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:12,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 487 transitions. [2021-06-05 20:34:12,109 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 487 transitions. Word has length 21 [2021-06-05 20:34:12,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:12,109 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 487 transitions. [2021-06-05 20:34:12,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 487 transitions. [2021-06-05 20:34:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:12,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:12,110 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:12,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:12,310 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash -69777195, now seen corresponding path program 91 times [2021-06-05 20:34:12,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:12,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302400592] [2021-06-05 20:34:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:12,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302400592] [2021-06-05 20:34:12,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302400592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970928214] [2021-06-05 20:34:12,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:12,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:12,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:12,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970928214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:12,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:12,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:12,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486819708] [2021-06-05 20:34:12,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:12,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:12,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:12,897 INFO L87 Difference]: Start difference. First operand 238 states and 487 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:13,980 INFO L93 Difference]: Finished difference Result 433 states and 853 transitions. [2021-06-05 20:34:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:34:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:13,981 INFO L225 Difference]: With dead ends: 433 [2021-06-05 20:34:13,981 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 20:34:13,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1043.8ms TimeCoverageRelationStatistics Valid=464, Invalid=2842, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:34:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 20:34:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 236. [2021-06-05 20:34:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.051063829787234) internal successors, (482), 235 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 482 transitions. [2021-06-05 20:34:13,987 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 482 transitions. Word has length 21 [2021-06-05 20:34:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:13,987 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 482 transitions. [2021-06-05 20:34:13,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 482 transitions. [2021-06-05 20:34:13,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:13,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:13,987 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:14,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 20:34:14,188 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash 681264537, now seen corresponding path program 92 times [2021-06-05 20:34:14,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:14,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099029824] [2021-06-05 20:34:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:14,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:14,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099029824] [2021-06-05 20:34:14,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099029824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:14,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489233413] [2021-06-05 20:34:14,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:14,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:14,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:14,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:14,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:14,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489233413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:14,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:14,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:14,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832106269] [2021-06-05 20:34:14,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:14,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:14,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:14,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:14,779 INFO L87 Difference]: Start difference. First operand 236 states and 482 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:16,118 INFO L93 Difference]: Finished difference Result 447 states and 879 transitions. [2021-06-05 20:34:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 20:34:16,118 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:16,118 INFO L225 Difference]: With dead ends: 447 [2021-06-05 20:34:16,118 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 20:34:16,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1291.3ms TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 20:34:16,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 20:34:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 245. [2021-06-05 20:34:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.0737704918032787) internal successors, (506), 244 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 506 transitions. [2021-06-05 20:34:16,122 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 506 transitions. Word has length 21 [2021-06-05 20:34:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:16,122 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 506 transitions. [2021-06-05 20:34:16,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 506 transitions. [2021-06-05 20:34:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:16,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:16,122 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:16,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:16,323 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 673941717, now seen corresponding path program 93 times [2021-06-05 20:34:16,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:16,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116807840] [2021-06-05 20:34:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:16,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116807840] [2021-06-05 20:34:16,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116807840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194886664] [2021-06-05 20:34:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:16,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:34:16,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:16,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:16,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194886664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:16,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:16,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:16,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633124597] [2021-06-05 20:34:16,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:16,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:16,909 INFO L87 Difference]: Start difference. First operand 245 states and 506 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:18,308 INFO L93 Difference]: Finished difference Result 495 states and 972 transitions. [2021-06-05 20:34:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 20:34:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:18,309 INFO L225 Difference]: With dead ends: 495 [2021-06-05 20:34:18,309 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 20:34:18,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1357.3ms TimeCoverageRelationStatistics Valid=666, Invalid=4026, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:34:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 20:34:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 246. [2021-06-05 20:34:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0816326530612246) internal successors, (510), 245 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 510 transitions. [2021-06-05 20:34:18,315 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 510 transitions. Word has length 21 [2021-06-05 20:34:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:18,315 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 510 transitions. [2021-06-05 20:34:18,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 510 transitions. [2021-06-05 20:34:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:18,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:18,316 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:18,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:18,516 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1509736235, now seen corresponding path program 94 times [2021-06-05 20:34:18,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:18,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145659726] [2021-06-05 20:34:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:18,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:18,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145659726] [2021-06-05 20:34:18,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145659726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:18,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450448219] [2021-06-05 20:34:18,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:18,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:34:18,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:18,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:18,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:19,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450448219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:19,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:19,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:19,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82567775] [2021-06-05 20:34:19,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:19,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:19,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:19,123 INFO L87 Difference]: Start difference. First operand 246 states and 510 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:20,365 INFO L93 Difference]: Finished difference Result 471 states and 936 transitions. [2021-06-05 20:34:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 20:34:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:20,366 INFO L225 Difference]: With dead ends: 471 [2021-06-05 20:34:20,366 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 20:34:20,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1220.2ms TimeCoverageRelationStatistics Valid=597, Invalid=3435, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:34:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 20:34:20,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 238. [2021-06-05 20:34:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.042194092827004) internal successors, (484), 237 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 484 transitions. [2021-06-05 20:34:20,370 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 484 transitions. Word has length 21 [2021-06-05 20:34:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:20,370 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 484 transitions. [2021-06-05 20:34:20,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 484 transitions. [2021-06-05 20:34:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:20,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:20,371 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:20,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:20,593 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:20,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:20,594 INFO L82 PathProgramCache]: Analyzing trace with hash 557638659, now seen corresponding path program 95 times [2021-06-05 20:34:20,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:20,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706958865] [2021-06-05 20:34:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:20,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:20,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706958865] [2021-06-05 20:34:20,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706958865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:20,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008350572] [2021-06-05 20:34:20,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:20,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:20,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:20,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:20,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:21,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008350572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:21,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:21,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:21,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264403921] [2021-06-05 20:34:21,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:21,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:21,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:21,215 INFO L87 Difference]: Start difference. First operand 238 states and 484 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:22,379 INFO L93 Difference]: Finished difference Result 417 states and 828 transitions. [2021-06-05 20:34:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:34:22,379 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:22,379 INFO L225 Difference]: With dead ends: 417 [2021-06-05 20:34:22,379 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 20:34:22,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1133.1ms TimeCoverageRelationStatistics Valid=482, Invalid=3058, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:34:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 20:34:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 243. [2021-06-05 20:34:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.06198347107438) internal successors, (499), 242 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 499 transitions. [2021-06-05 20:34:22,382 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 499 transitions. Word has length 21 [2021-06-05 20:34:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:22,382 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 499 transitions. [2021-06-05 20:34:22,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 499 transitions. [2021-06-05 20:34:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:22,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:22,383 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:22,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:22,583 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:22,583 INFO L82 PathProgramCache]: Analyzing trace with hash 550315839, now seen corresponding path program 96 times [2021-06-05 20:34:22,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:22,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062865435] [2021-06-05 20:34:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:22,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:22,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062865435] [2021-06-05 20:34:22,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062865435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:22,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781725566] [2021-06-05 20:34:22,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:22,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:34:22,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:22,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:22,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781725566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:23,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:23,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:23,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405261983] [2021-06-05 20:34:23,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:23,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:23,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:23,200 INFO L87 Difference]: Start difference. First operand 243 states and 499 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:24,505 INFO L93 Difference]: Finished difference Result 455 states and 902 transitions. [2021-06-05 20:34:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 20:34:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:24,506 INFO L225 Difference]: With dead ends: 455 [2021-06-05 20:34:24,506 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 20:34:24,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1247.0ms TimeCoverageRelationStatistics Valid=614, Invalid=3546, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 20:34:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 20:34:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 244. [2021-06-05 20:34:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.065843621399177) internal successors, (502), 243 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 502 transitions. [2021-06-05 20:34:24,509 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 502 transitions. Word has length 21 [2021-06-05 20:34:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:24,509 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 502 transitions. [2021-06-05 20:34:24,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 502 transitions. [2021-06-05 20:34:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:24,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:24,509 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:24,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 20:34:24,718 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:24,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:24,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1633362113, now seen corresponding path program 97 times [2021-06-05 20:34:24,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:24,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226787948] [2021-06-05 20:34:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:24,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:24,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226787948] [2021-06-05 20:34:24,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226787948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:24,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651841098] [2021-06-05 20:34:24,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:24,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:24,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:25,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651841098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:25,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:25,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:25,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485819804] [2021-06-05 20:34:25,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:25,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:25,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:25,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:25,314 INFO L87 Difference]: Start difference. First operand 244 states and 502 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:26,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:26,462 INFO L93 Difference]: Finished difference Result 453 states and 902 transitions. [2021-06-05 20:34:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 20:34:26,463 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:26,463 INFO L225 Difference]: With dead ends: 453 [2021-06-05 20:34:26,463 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 20:34:26,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1205.3ms TimeCoverageRelationStatistics Valid=590, Invalid=3442, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:34:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 20:34:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 240. [2021-06-05 20:34:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.0418410041841004) internal successors, (488), 239 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 488 transitions. [2021-06-05 20:34:26,466 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 488 transitions. Word has length 21 [2021-06-05 20:34:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:26,466 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 488 transitions. [2021-06-05 20:34:26,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 488 transitions. [2021-06-05 20:34:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:26,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:26,467 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:26,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 20:34:26,669 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:26,672 INFO L82 PathProgramCache]: Analyzing trace with hash -360311531, now seen corresponding path program 98 times [2021-06-05 20:34:26,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:26,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53659444] [2021-06-05 20:34:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:26,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:26,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53659444] [2021-06-05 20:34:26,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53659444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:26,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045322665] [2021-06-05 20:34:26,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:26,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:26,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:26,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:26,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:27,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045322665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:27,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:27,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:27,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136517205] [2021-06-05 20:34:27,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:27,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:27,269 INFO L87 Difference]: Start difference. First operand 240 states and 488 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:28,445 INFO L93 Difference]: Finished difference Result 423 states and 841 transitions. [2021-06-05 20:34:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:34:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:28,446 INFO L225 Difference]: With dead ends: 423 [2021-06-05 20:34:28,446 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 20:34:28,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1194.9ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:34:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 20:34:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 246. [2021-06-05 20:34:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.061224489795918) internal successors, (505), 245 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 505 transitions. [2021-06-05 20:34:28,449 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 505 transitions. Word has length 21 [2021-06-05 20:34:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:28,449 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 505 transitions. [2021-06-05 20:34:28,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 505 transitions. [2021-06-05 20:34:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:28,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:28,449 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:28,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 20:34:28,650 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash -367634351, now seen corresponding path program 99 times [2021-06-05 20:34:28,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:28,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378310072] [2021-06-05 20:34:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:28,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:28,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378310072] [2021-06-05 20:34:28,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378310072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:28,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713973234] [2021-06-05 20:34:28,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:28,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:34:28,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:28,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:28,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:29,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713973234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:29,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:29,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:29,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612514778] [2021-06-05 20:34:29,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:29,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:29,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:29,263 INFO L87 Difference]: Start difference. First operand 246 states and 505 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:30,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:30,615 INFO L93 Difference]: Finished difference Result 463 states and 919 transitions. [2021-06-05 20:34:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 20:34:30,615 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:30,615 INFO L225 Difference]: With dead ends: 463 [2021-06-05 20:34:30,615 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 20:34:30,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1313.0ms TimeCoverageRelationStatistics Valid=635, Invalid=3787, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 20:34:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 20:34:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 244. [2021-06-05 20:34:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.065843621399177) internal successors, (502), 243 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 502 transitions. [2021-06-05 20:34:30,618 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 502 transitions. Word has length 21 [2021-06-05 20:34:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:30,618 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 502 transitions. [2021-06-05 20:34:30,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:30,619 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 502 transitions. [2021-06-05 20:34:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:30,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:30,619 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:30,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 20:34:30,825 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:30,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1743654993, now seen corresponding path program 100 times [2021-06-05 20:34:30,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:30,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432000720] [2021-06-05 20:34:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:31,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:31,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432000720] [2021-06-05 20:34:31,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432000720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:31,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117913995] [2021-06-05 20:34:31,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:31,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:34:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:31,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:31,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:31,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117913995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:31,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:31,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:31,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317675417] [2021-06-05 20:34:31,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:31,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:31,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:31,436 INFO L87 Difference]: Start difference. First operand 244 states and 502 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:32,582 INFO L93 Difference]: Finished difference Result 460 states and 916 transitions. [2021-06-05 20:34:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:34:32,583 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:32,583 INFO L225 Difference]: With dead ends: 460 [2021-06-05 20:34:32,583 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 20:34:32,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1183.4ms TimeCoverageRelationStatistics Valid=587, Invalid=3319, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:34:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 20:34:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 234. [2021-06-05 20:34:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.0429184549356223) internal successors, (476), 233 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 476 transitions. [2021-06-05 20:34:32,586 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 476 transitions. Word has length 21 [2021-06-05 20:34:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:32,586 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 476 transitions. [2021-06-05 20:34:32,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 476 transitions. [2021-06-05 20:34:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:32,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:32,587 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:32,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 20:34:32,787 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1967849575, now seen corresponding path program 101 times [2021-06-05 20:34:32,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:32,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395804880] [2021-06-05 20:34:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:32,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:32,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395804880] [2021-06-05 20:34:32,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395804880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:32,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224090186] [2021-06-05 20:34:32,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:32,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:32,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:32,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:32,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:33,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224090186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:33,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:33,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:33,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828434549] [2021-06-05 20:34:33,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:33,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:33,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:33,394 INFO L87 Difference]: Start difference. First operand 234 states and 476 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:34,129 INFO L93 Difference]: Finished difference Result 372 states and 739 transitions. [2021-06-05 20:34:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:34:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:34,130 INFO L225 Difference]: With dead ends: 372 [2021-06-05 20:34:34,130 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 20:34:34,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 828.0ms TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:34:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 20:34:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 232. [2021-06-05 20:34:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.038961038961039) internal successors, (471), 231 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 471 transitions. [2021-06-05 20:34:34,132 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 471 transitions. Word has length 21 [2021-06-05 20:34:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:34,132 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 471 transitions. [2021-06-05 20:34:34,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 471 transitions. [2021-06-05 20:34:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:34,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:34,133 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:34,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:34,333 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:34,334 INFO L82 PathProgramCache]: Analyzing trace with hash 598310805, now seen corresponding path program 102 times [2021-06-05 20:34:34,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:34,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116042964] [2021-06-05 20:34:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:34,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:34,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116042964] [2021-06-05 20:34:34,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116042964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:34,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105930594] [2021-06-05 20:34:34,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:34,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:34:34,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:34,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:34,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:34,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105930594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:34,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:34,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:34,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738230428] [2021-06-05 20:34:34,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:34,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:34,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:34,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:34,973 INFO L87 Difference]: Start difference. First operand 232 states and 471 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:36,127 INFO L93 Difference]: Finished difference Result 413 states and 820 transitions. [2021-06-05 20:34:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:34:36,128 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:36,128 INFO L225 Difference]: With dead ends: 413 [2021-06-05 20:34:36,128 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 20:34:36,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1051.4ms TimeCoverageRelationStatistics Valid=447, Invalid=2633, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:34:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 20:34:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 238. [2021-06-05 20:34:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.0632911392405062) internal successors, (489), 237 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 489 transitions. [2021-06-05 20:34:36,131 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 489 transitions. Word has length 21 [2021-06-05 20:34:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:36,131 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 489 transitions. [2021-06-05 20:34:36,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 489 transitions. [2021-06-05 20:34:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:36,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:36,132 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:36,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:36,332 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:36,332 INFO L82 PathProgramCache]: Analyzing trace with hash 590987985, now seen corresponding path program 103 times [2021-06-05 20:34:36,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:36,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003986304] [2021-06-05 20:34:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:36,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:36,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003986304] [2021-06-05 20:34:36,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003986304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:36,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198650029] [2021-06-05 20:34:36,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:36,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:36,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198650029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:36,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:36,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:36,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118297168] [2021-06-05 20:34:36,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:36,934 INFO L87 Difference]: Start difference. First operand 238 states and 489 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:38,160 INFO L93 Difference]: Finished difference Result 451 states and 895 transitions. [2021-06-05 20:34:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:34:38,160 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:38,161 INFO L225 Difference]: With dead ends: 451 [2021-06-05 20:34:38,161 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 20:34:38,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1176.7ms TimeCoverageRelationStatistics Valid=592, Invalid=3190, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:34:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 20:34:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 240. [2021-06-05 20:34:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.071129707112971) internal successors, (495), 239 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 495 transitions. [2021-06-05 20:34:38,165 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 495 transitions. Word has length 21 [2021-06-05 20:34:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:38,166 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 495 transitions. [2021-06-05 20:34:38,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 495 transitions. [2021-06-05 20:34:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:38,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:38,166 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:38,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:38,381 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:38,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1592689967, now seen corresponding path program 104 times [2021-06-05 20:34:38,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:38,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573740189] [2021-06-05 20:34:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:38,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:38,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573740189] [2021-06-05 20:34:38,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573740189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:38,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443908420] [2021-06-05 20:34:38,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:38,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:38,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:38,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:38,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:39,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443908420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:39,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:39,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:39,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452442815] [2021-06-05 20:34:39,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:39,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:39,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:39,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:39,006 INFO L87 Difference]: Start difference. First operand 240 states and 495 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:40,320 INFO L93 Difference]: Finished difference Result 465 states and 918 transitions. [2021-06-05 20:34:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:34:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:40,321 INFO L225 Difference]: With dead ends: 465 [2021-06-05 20:34:40,321 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 20:34:40,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1209.4ms TimeCoverageRelationStatistics Valid=613, Invalid=3293, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:34:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 20:34:40,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 236. [2021-06-05 20:34:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.046808510638298) internal successors, (481), 235 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 481 transitions. [2021-06-05 20:34:40,324 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 481 transitions. Word has length 21 [2021-06-05 20:34:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:40,324 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 481 transitions. [2021-06-05 20:34:40,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 481 transitions. [2021-06-05 20:34:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:40,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:40,324 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:40,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:40,525 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:40,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1112582865, now seen corresponding path program 105 times [2021-06-05 20:34:40,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:40,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154432233] [2021-06-05 20:34:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:40,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:40,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154432233] [2021-06-05 20:34:40,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154432233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:40,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373869389] [2021-06-05 20:34:40,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:40,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:34:40,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:40,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:40,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:41,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373869389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:41,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:41,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:41,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016597160] [2021-06-05 20:34:41,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:41,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:41,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:41,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:41,198 INFO L87 Difference]: Start difference. First operand 236 states and 481 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:42,049 INFO L93 Difference]: Finished difference Result 413 states and 819 transitions. [2021-06-05 20:34:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:34:42,049 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:42,050 INFO L225 Difference]: With dead ends: 413 [2021-06-05 20:34:42,050 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 20:34:42,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1008.5ms TimeCoverageRelationStatistics Valid=433, Invalid=2429, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:34:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 20:34:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 234. [2021-06-05 20:34:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.03862660944206) internal successors, (475), 233 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 475 transitions. [2021-06-05 20:34:42,052 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 475 transitions. Word has length 21 [2021-06-05 20:34:42,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:42,053 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 475 transitions. [2021-06-05 20:34:42,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 475 transitions. [2021-06-05 20:34:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:42,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:42,053 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:42,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:42,253 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1015255929, now seen corresponding path program 106 times [2021-06-05 20:34:42,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:42,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832690225] [2021-06-05 20:34:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:42,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:42,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832690225] [2021-06-05 20:34:42,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832690225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:42,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029219612] [2021-06-05 20:34:42,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:42,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:34:42,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:42,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:42,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:42,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029219612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:42,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:42,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:42,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561885007] [2021-06-05 20:34:42,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:42,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:42,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:42,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:42,859 INFO L87 Difference]: Start difference. First operand 234 states and 475 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:43,940 INFO L93 Difference]: Finished difference Result 414 states and 822 transitions. [2021-06-05 20:34:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:34:43,940 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:43,941 INFO L225 Difference]: With dead ends: 414 [2021-06-05 20:34:43,941 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 20:34:43,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1020.5ms TimeCoverageRelationStatistics Valid=441, Invalid=2639, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:34:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 20:34:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 239. [2021-06-05 20:34:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.0588235294117645) internal successors, (490), 238 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 490 transitions. [2021-06-05 20:34:43,944 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 490 transitions. Word has length 21 [2021-06-05 20:34:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:43,944 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 490 transitions. [2021-06-05 20:34:43,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 490 transitions. [2021-06-05 20:34:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:43,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:43,944 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:44,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:44,146 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:44,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1022578749, now seen corresponding path program 107 times [2021-06-05 20:34:44,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:44,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694333994] [2021-06-05 20:34:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:44,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:44,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694333994] [2021-06-05 20:34:44,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694333994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:44,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607332804] [2021-06-05 20:34:44,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:44,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:44,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:44,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:44,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607332804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:44,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:44,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:44,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679928384] [2021-06-05 20:34:44,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:44,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:44,777 INFO L87 Difference]: Start difference. First operand 239 states and 490 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:46,032 INFO L93 Difference]: Finished difference Result 452 states and 897 transitions. [2021-06-05 20:34:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:34:46,032 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:46,033 INFO L225 Difference]: With dead ends: 452 [2021-06-05 20:34:46,033 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 20:34:46,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1174.9ms TimeCoverageRelationStatistics Valid=586, Invalid=3196, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:34:46,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 20:34:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 240. [2021-06-05 20:34:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.062761506276151) internal successors, (493), 239 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 493 transitions. [2021-06-05 20:34:46,036 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 493 transitions. Word has length 21 [2021-06-05 20:34:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:46,036 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 493 transitions. [2021-06-05 20:34:46,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 493 transitions. [2021-06-05 20:34:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:46,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:46,036 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:46,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:46,237 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1088710595, now seen corresponding path program 108 times [2021-06-05 20:34:46,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:46,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707440912] [2021-06-05 20:34:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:46,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:46,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707440912] [2021-06-05 20:34:46,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707440912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:46,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501285128] [2021-06-05 20:34:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:46,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:34:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:46,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:46,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:46,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501285128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:46,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:46,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:46,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238519159] [2021-06-05 20:34:46,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:46,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:46,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:46,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:46,847 INFO L87 Difference]: Start difference. First operand 240 states and 493 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:48,099 INFO L93 Difference]: Finished difference Result 453 states and 902 transitions. [2021-06-05 20:34:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:34:48,099 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:48,100 INFO L225 Difference]: With dead ends: 453 [2021-06-05 20:34:48,100 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 20:34:48,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1206.3ms TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:34:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 20:34:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 236. [2021-06-05 20:34:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.0382978723404257) internal successors, (479), 235 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 479 transitions. [2021-06-05 20:34:48,103 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 479 transitions. Word has length 21 [2021-06-05 20:34:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:48,103 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 479 transitions. [2021-06-05 20:34:48,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 479 transitions. [2021-06-05 20:34:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:48,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:48,103 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:48,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 20:34:48,304 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:48,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1933206119, now seen corresponding path program 109 times [2021-06-05 20:34:48,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:48,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077365507] [2021-06-05 20:34:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:48,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:48,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077365507] [2021-06-05 20:34:48,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077365507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:48,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398717385] [2021-06-05 20:34:48,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:48,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:48,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398717385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:48,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:48,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:48,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258112377] [2021-06-05 20:34:48,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:48,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:48,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:48,925 INFO L87 Difference]: Start difference. First operand 236 states and 479 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:50,014 INFO L93 Difference]: Finished difference Result 415 states and 824 transitions. [2021-06-05 20:34:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:34:50,014 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:50,014 INFO L225 Difference]: With dead ends: 415 [2021-06-05 20:34:50,014 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 20:34:50,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1089.4ms TimeCoverageRelationStatistics Valid=470, Invalid=2722, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:34:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 20:34:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 242. [2021-06-05 20:34:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.0580912863070537) internal successors, (496), 241 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 496 transitions. [2021-06-05 20:34:50,017 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 496 transitions. Word has length 21 [2021-06-05 20:34:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:50,017 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 496 transitions. [2021-06-05 20:34:50,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 496 transitions. [2021-06-05 20:34:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:50,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:50,018 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:50,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:50,218 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1940528939, now seen corresponding path program 110 times [2021-06-05 20:34:50,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:50,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021764840] [2021-06-05 20:34:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:50,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:50,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021764840] [2021-06-05 20:34:50,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021764840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:50,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654692410] [2021-06-05 20:34:50,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:50,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:50,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:50,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:50,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654692410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:50,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:50,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:50,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670308964] [2021-06-05 20:34:50,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:50,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:50,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:50,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:50,859 INFO L87 Difference]: Start difference. First operand 242 states and 496 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:52,104 INFO L93 Difference]: Finished difference Result 453 states and 899 transitions. [2021-06-05 20:34:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:34:52,105 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:52,105 INFO L225 Difference]: With dead ends: 453 [2021-06-05 20:34:52,105 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 20:34:52,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1239.1ms TimeCoverageRelationStatistics Valid=602, Invalid=3304, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:34:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 20:34:52,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 240. [2021-06-05 20:34:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.062761506276151) internal successors, (493), 239 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 493 transitions. [2021-06-05 20:34:52,108 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 493 transitions. Word has length 21 [2021-06-05 20:34:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:52,108 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 493 transitions. [2021-06-05 20:34:52,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 493 transitions. [2021-06-05 20:34:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:52,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:52,108 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:52,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 20:34:52,309 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:52,309 INFO L82 PathProgramCache]: Analyzing trace with hash 170760405, now seen corresponding path program 111 times [2021-06-05 20:34:52,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:52,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212117060] [2021-06-05 20:34:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:52,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:52,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212117060] [2021-06-05 20:34:52,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212117060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:52,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858542607] [2021-06-05 20:34:52,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:52,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:34:52,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:52,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:52,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:52,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858542607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:52,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:52,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140900258] [2021-06-05 20:34:52,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:52,932 INFO L87 Difference]: Start difference. First operand 240 states and 493 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:54,129 INFO L93 Difference]: Finished difference Result 449 states and 894 transitions. [2021-06-05 20:34:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:34:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:54,130 INFO L225 Difference]: With dead ends: 449 [2021-06-05 20:34:54,130 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 20:34:54,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1175.4ms TimeCoverageRelationStatistics Valid=608, Invalid=3174, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:34:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 20:34:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 228. [2021-06-05 20:34:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.039647577092511) internal successors, (463), 227 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 463 transitions. [2021-06-05 20:34:54,133 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 463 transitions. Word has length 21 [2021-06-05 20:34:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:54,133 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 463 transitions. [2021-06-05 20:34:54,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:54,133 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 463 transitions. [2021-06-05 20:34:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:54,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:54,134 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:54,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:54,334 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:54,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:54,334 INFO L82 PathProgramCache]: Analyzing trace with hash -630282361, now seen corresponding path program 112 times [2021-06-05 20:34:54,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:54,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323205517] [2021-06-05 20:34:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:54,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:54,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323205517] [2021-06-05 20:34:54,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323205517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:54,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815995310] [2021-06-05 20:34:54,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:54,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:34:54,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:54,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:54,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815995310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:54,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:54,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:54,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298487707] [2021-06-05 20:34:54,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:54,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:54,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:54,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:54,957 INFO L87 Difference]: Start difference. First operand 228 states and 463 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:55,634 INFO L93 Difference]: Finished difference Result 364 states and 722 transitions. [2021-06-05 20:34:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:34:55,634 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:55,635 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:34:55,635 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:34:55,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 851.8ms TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:34:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:34:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 226. [2021-06-05 20:34:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.04) internal successors, (459), 225 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 459 transitions. [2021-06-05 20:34:55,637 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 459 transitions. Word has length 21 [2021-06-05 20:34:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:55,637 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 459 transitions. [2021-06-05 20:34:55,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 459 transitions. [2021-06-05 20:34:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:55,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:55,638 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:55,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 20:34:55,838 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1742246013, now seen corresponding path program 113 times [2021-06-05 20:34:55,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:55,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064483362] [2021-06-05 20:34:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:56,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:56,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064483362] [2021-06-05 20:34:56,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064483362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:56,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082753273] [2021-06-05 20:34:56,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:56,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:34:56,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:56,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:56,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082753273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:56,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:56,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:56,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115366142] [2021-06-05 20:34:56,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:56,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:56,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:56,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:56,456 INFO L87 Difference]: Start difference. First operand 226 states and 459 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:57,588 INFO L93 Difference]: Finished difference Result 413 states and 817 transitions. [2021-06-05 20:34:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:34:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:57,589 INFO L225 Difference]: With dead ends: 413 [2021-06-05 20:34:57,589 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 20:34:57,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1040.6ms TimeCoverageRelationStatistics Valid=429, Invalid=2651, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:34:57,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 20:34:57,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 232. [2021-06-05 20:34:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.0606060606060606) internal successors, (476), 231 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 476 transitions. [2021-06-05 20:34:57,592 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 476 transitions. Word has length 21 [2021-06-05 20:34:57,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:57,592 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 476 transitions. [2021-06-05 20:34:57,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 476 transitions. [2021-06-05 20:34:57,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:57,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:57,592 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:57,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:57,793 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:57,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1749568833, now seen corresponding path program 114 times [2021-06-05 20:34:57,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:57,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783769997] [2021-06-05 20:34:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:57,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:57,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783769997] [2021-06-05 20:34:57,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783769997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:57,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685379217] [2021-06-05 20:34:57,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:57,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:34:57,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:57,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:34:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:58,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685379217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:58,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:58,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:34:58,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025879573] [2021-06-05 20:34:58,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:34:58,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:58,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:34:58,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:34:58,408 INFO L87 Difference]: Start difference. First operand 232 states and 476 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:59,607 INFO L93 Difference]: Finished difference Result 461 states and 902 transitions. [2021-06-05 20:34:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:34:59,607 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:34:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:59,608 INFO L225 Difference]: With dead ends: 461 [2021-06-05 20:34:59,608 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 20:34:59,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1142.9ms TimeCoverageRelationStatistics Valid=537, Invalid=3123, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:34:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 20:34:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 230. [2021-06-05 20:34:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.0655021834061134) internal successors, (473), 229 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 473 transitions. [2021-06-05 20:34:59,611 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 473 transitions. Word has length 21 [2021-06-05 20:34:59,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:59,611 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 473 transitions. [2021-06-05 20:34:59,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:59,611 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 473 transitions. [2021-06-05 20:34:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:34:59,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:59,611 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:59,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:59,812 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash 361720511, now seen corresponding path program 115 times [2021-06-05 20:34:59,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:59,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025095255] [2021-06-05 20:34:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:59,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:59,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025095255] [2021-06-05 20:34:59,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025095255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:59,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983021167] [2021-06-05 20:34:59,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:00,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:00,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:00,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983021167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:00,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:00,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:00,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779040605] [2021-06-05 20:35:00,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:00,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:00,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:00,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:00,419 INFO L87 Difference]: Start difference. First operand 230 states and 473 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:01,640 INFO L93 Difference]: Finished difference Result 442 states and 876 transitions. [2021-06-05 20:35:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:35:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:01,641 INFO L225 Difference]: With dead ends: 442 [2021-06-05 20:35:01,641 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 20:35:01,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1185.0ms TimeCoverageRelationStatistics Valid=587, Invalid=3195, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:35:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 20:35:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 224. [2021-06-05 20:35:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.031390134529148) internal successors, (453), 223 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 453 transitions. [2021-06-05 20:35:01,644 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 453 transitions. Word has length 21 [2021-06-05 20:35:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:01,644 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 453 transitions. [2021-06-05 20:35:01,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 453 transitions. [2021-06-05 20:35:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:01,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:01,644 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:01,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:01,849 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1359525625, now seen corresponding path program 116 times [2021-06-05 20:35:01,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:01,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330382357] [2021-06-05 20:35:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:02,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:02,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330382357] [2021-06-05 20:35:02,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330382357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:02,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401636059] [2021-06-05 20:35:02,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:02,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:02,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:02,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:02,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401636059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:02,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:02,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:02,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152112197] [2021-06-05 20:35:02,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:02,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:02,469 INFO L87 Difference]: Start difference. First operand 224 states and 453 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:03,491 INFO L93 Difference]: Finished difference Result 398 states and 789 transitions. [2021-06-05 20:35:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:35:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:03,492 INFO L225 Difference]: With dead ends: 398 [2021-06-05 20:35:03,492 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 20:35:03,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 976.9ms TimeCoverageRelationStatistics Valid=375, Invalid=2381, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:35:03,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 20:35:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 229. [2021-06-05 20:35:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.0526315789473686) internal successors, (468), 228 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 468 transitions. [2021-06-05 20:35:03,495 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 468 transitions. Word has length 21 [2021-06-05 20:35:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:03,495 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 468 transitions. [2021-06-05 20:35:03,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 468 transitions. [2021-06-05 20:35:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:03,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:03,495 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:03,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:03,696 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:03,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1366848445, now seen corresponding path program 117 times [2021-06-05 20:35:03,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:03,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834431192] [2021-06-05 20:35:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:03,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:03,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834431192] [2021-06-05 20:35:03,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834431192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:03,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782288520] [2021-06-05 20:35:03,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:03,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:35:03,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:03,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:04,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782288520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:04,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:04,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:04,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110533996] [2021-06-05 20:35:04,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:04,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:04,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:04,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:04,301 INFO L87 Difference]: Start difference. First operand 229 states and 468 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:05,317 INFO L93 Difference]: Finished difference Result 435 states and 860 transitions. [2021-06-05 20:35:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:35:05,317 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:05,318 INFO L225 Difference]: With dead ends: 435 [2021-06-05 20:35:05,318 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 20:35:05,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1078.7ms TimeCoverageRelationStatistics Valid=507, Invalid=2915, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:35:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 20:35:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 230. [2021-06-05 20:35:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.056768558951965) internal successors, (471), 229 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 471 transitions. [2021-06-05 20:35:05,321 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 471 transitions. Word has length 21 [2021-06-05 20:35:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:05,321 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 471 transitions. [2021-06-05 20:35:05,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 471 transitions. [2021-06-05 20:35:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:05,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:05,321 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:05,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 20:35:05,522 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:05,522 INFO L82 PathProgramCache]: Analyzing trace with hash 744440899, now seen corresponding path program 118 times [2021-06-05 20:35:05,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:05,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361012216] [2021-06-05 20:35:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:05,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:05,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361012216] [2021-06-05 20:35:05,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361012216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:05,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942762696] [2021-06-05 20:35:05,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:05,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:35:05,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:05,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:05,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:06,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942762696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:06,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:06,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:06,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390356502] [2021-06-05 20:35:06,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:06,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:06,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:06,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:06,152 INFO L87 Difference]: Start difference. First operand 230 states and 471 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:07,403 INFO L93 Difference]: Finished difference Result 446 states and 885 transitions. [2021-06-05 20:35:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:35:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:07,403 INFO L225 Difference]: With dead ends: 446 [2021-06-05 20:35:07,403 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 20:35:07,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1209.7ms TimeCoverageRelationStatistics Valid=592, Invalid=3314, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:35:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 20:35:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 226. [2021-06-05 20:35:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.031111111111111) internal successors, (457), 225 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 457 transitions. [2021-06-05 20:35:07,406 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 457 transitions. Word has length 21 [2021-06-05 20:35:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:07,407 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 457 transitions. [2021-06-05 20:35:07,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 457 transitions. [2021-06-05 20:35:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:07,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:07,407 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:07,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 20:35:07,607 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:07,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2017491481, now seen corresponding path program 119 times [2021-06-05 20:35:07,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:07,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654342512] [2021-06-05 20:35:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:07,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:07,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654342512] [2021-06-05 20:35:07,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654342512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:07,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156335753] [2021-06-05 20:35:07,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:07,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:35:07,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:07,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:07,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:08,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156335753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:08,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:08,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:08,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867487950] [2021-06-05 20:35:08,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:08,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:08,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:08,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:08,226 INFO L87 Difference]: Start difference. First operand 226 states and 457 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:09,361 INFO L93 Difference]: Finished difference Result 403 states and 799 transitions. [2021-06-05 20:35:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:35:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:09,362 INFO L225 Difference]: With dead ends: 403 [2021-06-05 20:35:09,362 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 20:35:09,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1040.5ms TimeCoverageRelationStatistics Valid=430, Invalid=2650, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:35:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 20:35:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 232. [2021-06-05 20:35:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.051948051948052) internal successors, (474), 231 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 474 transitions. [2021-06-05 20:35:09,364 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 474 transitions. Word has length 21 [2021-06-05 20:35:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:09,365 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 474 transitions. [2021-06-05 20:35:09,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 474 transitions. [2021-06-05 20:35:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:09,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:09,365 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:09,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:09,581 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:09,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2010168661, now seen corresponding path program 120 times [2021-06-05 20:35:09,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:09,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062669665] [2021-06-05 20:35:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:09,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:09,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062669665] [2021-06-05 20:35:09,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062669665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:09,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336742104] [2021-06-05 20:35:09,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:09,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:35:09,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:09,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:09,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:10,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336742104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:10,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:10,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:10,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069313538] [2021-06-05 20:35:10,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:10,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:10,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:10,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:10,194 INFO L87 Difference]: Start difference. First operand 232 states and 474 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:11,324 INFO L93 Difference]: Finished difference Result 444 states and 878 transitions. [2021-06-05 20:35:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:35:11,324 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:11,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:11,325 INFO L225 Difference]: With dead ends: 444 [2021-06-05 20:35:11,325 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 20:35:11,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1131.9ms TimeCoverageRelationStatistics Valid=536, Invalid=3124, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:35:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 20:35:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 230. [2021-06-05 20:35:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.056768558951965) internal successors, (471), 229 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 471 transitions. [2021-06-05 20:35:11,328 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 471 transitions. Word has length 21 [2021-06-05 20:35:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:11,328 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 471 transitions. [2021-06-05 20:35:11,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 471 transitions. [2021-06-05 20:35:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:11,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:11,328 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:11,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 20:35:11,529 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:11,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:11,529 INFO L82 PathProgramCache]: Analyzing trace with hash -173509291, now seen corresponding path program 121 times [2021-06-05 20:35:11,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:11,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899168390] [2021-06-05 20:35:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:11,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:11,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899168390] [2021-06-05 20:35:11,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899168390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:11,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559580506] [2021-06-05 20:35:11,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:11,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:11,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559580506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:12,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:12,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932303498] [2021-06-05 20:35:12,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:12,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:12,137 INFO L87 Difference]: Start difference. First operand 230 states and 471 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:13,411 INFO L93 Difference]: Finished difference Result 444 states and 881 transitions. [2021-06-05 20:35:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:35:13,411 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:13,412 INFO L225 Difference]: With dead ends: 444 [2021-06-05 20:35:13,412 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 20:35:13,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1181.6ms TimeCoverageRelationStatistics Valid=589, Invalid=3193, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:35:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 20:35:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 222. [2021-06-05 20:35:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.0316742081447963) internal successors, (449), 221 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 449 transitions. [2021-06-05 20:35:13,415 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 449 transitions. Word has length 21 [2021-06-05 20:35:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:13,415 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 449 transitions. [2021-06-05 20:35:13,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 449 transitions. [2021-06-05 20:35:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:13,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:13,415 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:13,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 20:35:13,616 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:13,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:13,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1935878019, now seen corresponding path program 122 times [2021-06-05 20:35:13,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:13,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605740242] [2021-06-05 20:35:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:13,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:13,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605740242] [2021-06-05 20:35:13,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605740242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:13,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825012349] [2021-06-05 20:35:13,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:13,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:13,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:13,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:13,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:14,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825012349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:14,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:14,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:14,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60383443] [2021-06-05 20:35:14,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:14,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:14,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:14,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:14,233 INFO L87 Difference]: Start difference. First operand 222 states and 449 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:15,127 INFO L93 Difference]: Finished difference Result 401 states and 795 transitions. [2021-06-05 20:35:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:35:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:15,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:15,128 INFO L225 Difference]: With dead ends: 401 [2021-06-05 20:35:15,128 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 20:35:15,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 952.3ms TimeCoverageRelationStatistics Valid=382, Invalid=2374, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:35:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 20:35:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 228. [2021-06-05 20:35:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.05726872246696) internal successors, (467), 227 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 467 transitions. [2021-06-05 20:35:15,131 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 467 transitions. Word has length 21 [2021-06-05 20:35:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:15,131 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 467 transitions. [2021-06-05 20:35:15,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 467 transitions. [2021-06-05 20:35:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:15,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:15,131 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:15,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 20:35:15,332 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1928555199, now seen corresponding path program 123 times [2021-06-05 20:35:15,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:15,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634388405] [2021-06-05 20:35:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:15,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:15,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634388405] [2021-06-05 20:35:15,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634388405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:15,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296753765] [2021-06-05 20:35:15,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:15,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:35:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:15,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:15,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296753765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:15,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:15,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:15,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508144394] [2021-06-05 20:35:15,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:15,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:15,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:15,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:15,959 INFO L87 Difference]: Start difference. First operand 228 states and 467 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:17,100 INFO L93 Difference]: Finished difference Result 441 states and 873 transitions. [2021-06-05 20:35:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:35:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:17,100 INFO L225 Difference]: With dead ends: 441 [2021-06-05 20:35:17,101 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 20:35:17,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1109.6ms TimeCoverageRelationStatistics Valid=531, Invalid=3009, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:35:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 20:35:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 230. [2021-06-05 20:35:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.0655021834061134) internal successors, (473), 229 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 473 transitions. [2021-06-05 20:35:17,103 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 473 transitions. Word has length 21 [2021-06-05 20:35:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:17,103 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 473 transitions. [2021-06-05 20:35:17,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 473 transitions. [2021-06-05 20:35:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:17,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:17,104 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:17,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:17,304 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash -255122753, now seen corresponding path program 124 times [2021-06-05 20:35:17,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:17,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097203692] [2021-06-05 20:35:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:17,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097203692] [2021-06-05 20:35:17,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097203692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432226531] [2021-06-05 20:35:17,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:17,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:35:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:17,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:17,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:17,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432226531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:17,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:17,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:17,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142557854] [2021-06-05 20:35:17,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:17,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:17,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:17,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:17,946 INFO L87 Difference]: Start difference. First operand 230 states and 473 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:19,265 INFO L93 Difference]: Finished difference Result 466 states and 918 transitions. [2021-06-05 20:35:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 20:35:19,265 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:19,266 INFO L225 Difference]: With dead ends: 466 [2021-06-05 20:35:19,266 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 20:35:19,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1218.6ms TimeCoverageRelationStatistics Valid=631, Invalid=3401, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:35:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 20:35:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 226. [2021-06-05 20:35:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.04) internal successors, (459), 225 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 459 transitions. [2021-06-05 20:35:19,269 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 459 transitions. Word has length 21 [2021-06-05 20:35:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:19,269 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 459 transitions. [2021-06-05 20:35:19,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 459 transitions. [2021-06-05 20:35:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:19,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:19,269 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:19,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 20:35:19,470 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1844817217, now seen corresponding path program 125 times [2021-06-05 20:35:19,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:19,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290299426] [2021-06-05 20:35:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:19,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:19,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290299426] [2021-06-05 20:35:19,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290299426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:19,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241078143] [2021-06-05 20:35:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:19,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:19,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:19,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:20,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241078143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:20,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:20,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139890865] [2021-06-05 20:35:20,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:20,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:20,069 INFO L87 Difference]: Start difference. First operand 226 states and 459 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:20,918 INFO L93 Difference]: Finished difference Result 403 states and 797 transitions. [2021-06-05 20:35:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:35:20,919 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:20,919 INFO L225 Difference]: With dead ends: 403 [2021-06-05 20:35:20,919 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 20:35:20,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 964.5ms TimeCoverageRelationStatistics Valid=453, Invalid=2517, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:35:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 20:35:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 224. [2021-06-05 20:35:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.031390134529148) internal successors, (453), 223 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 453 transitions. [2021-06-05 20:35:20,922 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 453 transitions. Word has length 21 [2021-06-05 20:35:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:20,922 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 453 transitions. [2021-06-05 20:35:20,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 453 transitions. [2021-06-05 20:35:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:20,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:20,922 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:21,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:21,122 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash 322311285, now seen corresponding path program 126 times [2021-06-05 20:35:21,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:21,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542573680] [2021-06-05 20:35:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:21,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:21,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542573680] [2021-06-05 20:35:21,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542573680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:21,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496216695] [2021-06-05 20:35:21,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:21,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:35:21,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:21,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:21,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:21,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496216695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:21,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:21,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:21,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973560043] [2021-06-05 20:35:21,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:21,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:21,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:21,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:21,731 INFO L87 Difference]: Start difference. First operand 224 states and 453 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:22,635 INFO L93 Difference]: Finished difference Result 402 states and 797 transitions. [2021-06-05 20:35:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:35:22,636 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:22,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:22,636 INFO L225 Difference]: With dead ends: 402 [2021-06-05 20:35:22,636 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 20:35:22,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 954.6ms TimeCoverageRelationStatistics Valid=393, Invalid=2469, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:35:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 20:35:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 229. [2021-06-05 20:35:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.0526315789473686) internal successors, (468), 228 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 468 transitions. [2021-06-05 20:35:22,639 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 468 transitions. Word has length 21 [2021-06-05 20:35:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:22,639 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 468 transitions. [2021-06-05 20:35:22,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 468 transitions. [2021-06-05 20:35:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:22,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:22,639 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:22,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:22,840 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:22,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:22,840 INFO L82 PathProgramCache]: Analyzing trace with hash 314988465, now seen corresponding path program 127 times [2021-06-05 20:35:22,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:22,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39530574] [2021-06-05 20:35:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:23,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39530574] [2021-06-05 20:35:23,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39530574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013321558] [2021-06-05 20:35:23,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:23,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:23,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:23,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013321558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:23,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:23,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:23,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577500245] [2021-06-05 20:35:23,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:23,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:23,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:23,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:23,481 INFO L87 Difference]: Start difference. First operand 229 states and 468 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:24,596 INFO L93 Difference]: Finished difference Result 442 states and 875 transitions. [2021-06-05 20:35:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:35:24,597 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:24,597 INFO L225 Difference]: With dead ends: 442 [2021-06-05 20:35:24,597 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 20:35:24,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1103.0ms TimeCoverageRelationStatistics Valid=526, Invalid=3014, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:35:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 20:35:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 230. [2021-06-05 20:35:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.056768558951965) internal successors, (471), 229 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 471 transitions. [2021-06-05 20:35:24,600 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 471 transitions. Word has length 21 [2021-06-05 20:35:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:24,600 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 471 transitions. [2021-06-05 20:35:24,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 471 transitions. [2021-06-05 20:35:24,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:24,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:24,601 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:24,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:24,801 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:24,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1868689487, now seen corresponding path program 128 times [2021-06-05 20:35:24,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:24,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085662313] [2021-06-05 20:35:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:24,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:24,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085662313] [2021-06-05 20:35:24,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085662313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:24,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511769775] [2021-06-05 20:35:24,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:24,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:24,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:24,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:24,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:25,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511769775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:25,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:25,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:25,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719029778] [2021-06-05 20:35:25,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:25,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:25,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:25,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:25,401 INFO L87 Difference]: Start difference. First operand 230 states and 471 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:26,512 INFO L93 Difference]: Finished difference Result 441 states and 876 transitions. [2021-06-05 20:35:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:35:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:26,513 INFO L225 Difference]: With dead ends: 441 [2021-06-05 20:35:26,513 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 20:35:26,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1183.1ms TimeCoverageRelationStatistics Valid=601, Invalid=3305, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:35:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 20:35:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 226. [2021-06-05 20:35:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.031111111111111) internal successors, (457), 225 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 457 transitions. [2021-06-05 20:35:26,516 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 457 transitions. Word has length 21 [2021-06-05 20:35:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:26,516 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 457 transitions. [2021-06-05 20:35:26,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 457 transitions. [2021-06-05 20:35:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:26,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:26,517 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:26,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:26,717 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash -595638905, now seen corresponding path program 129 times [2021-06-05 20:35:26,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:26,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082095738] [2021-06-05 20:35:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:26,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:26,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082095738] [2021-06-05 20:35:26,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082095738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:26,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536378698] [2021-06-05 20:35:26,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:26,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:35:26,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:26,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:27,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536378698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:27,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:27,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:27,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034435151] [2021-06-05 20:35:27,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:27,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:27,329 INFO L87 Difference]: Start difference. First operand 226 states and 457 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:28,312 INFO L93 Difference]: Finished difference Result 399 states and 791 transitions. [2021-06-05 20:35:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:35:28,312 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:28,312 INFO L225 Difference]: With dead ends: 399 [2021-06-05 20:35:28,313 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 20:35:28,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 993.9ms TimeCoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:35:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 20:35:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 232. [2021-06-05 20:35:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.051948051948052) internal successors, (474), 231 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 474 transitions. [2021-06-05 20:35:28,315 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 474 transitions. Word has length 21 [2021-06-05 20:35:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:28,315 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 474 transitions. [2021-06-05 20:35:28,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 474 transitions. [2021-06-05 20:35:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:28,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:28,316 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:28,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 20:35:28,516 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:28,516 INFO L82 PathProgramCache]: Analyzing trace with hash -602961725, now seen corresponding path program 130 times [2021-06-05 20:35:28,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:28,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849167167] [2021-06-05 20:35:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:28,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:28,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849167167] [2021-06-05 20:35:28,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849167167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:28,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089428588] [2021-06-05 20:35:28,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:28,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:35:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:28,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:29,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089428588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:29,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:29,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:29,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282290971] [2021-06-05 20:35:29,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:29,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:29,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:29,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:29,113 INFO L87 Difference]: Start difference. First operand 232 states and 474 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:30,275 INFO L93 Difference]: Finished difference Result 438 states and 867 transitions. [2021-06-05 20:35:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:35:30,275 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:30,275 INFO L225 Difference]: With dead ends: 438 [2021-06-05 20:35:30,275 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 20:35:30,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1111.1ms TimeCoverageRelationStatistics Valid=544, Invalid=3116, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:35:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 20:35:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 230. [2021-06-05 20:35:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.056768558951965) internal successors, (471), 229 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 471 transitions. [2021-06-05 20:35:30,278 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 471 transitions. Word has length 21 [2021-06-05 20:35:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:30,279 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 471 transitions. [2021-06-05 20:35:30,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 471 transitions. [2021-06-05 20:35:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:30,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:30,279 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:30,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 20:35:30,479 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:30,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1508327619, now seen corresponding path program 131 times [2021-06-05 20:35:30,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:30,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843794415] [2021-06-05 20:35:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:30,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:30,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843794415] [2021-06-05 20:35:30,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843794415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:30,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035434272] [2021-06-05 20:35:30,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:30,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:30,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:30,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:30,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:31,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035434272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:31,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:31,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:31,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374330457] [2021-06-05 20:35:31,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:31,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:31,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:31,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:31,076 INFO L87 Difference]: Start difference. First operand 230 states and 471 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:32,239 INFO L93 Difference]: Finished difference Result 439 states and 872 transitions. [2021-06-05 20:35:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:35:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:32,239 INFO L225 Difference]: With dead ends: 439 [2021-06-05 20:35:32,239 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 20:35:32,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1163.0ms TimeCoverageRelationStatistics Valid=604, Invalid=3178, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:35:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 20:35:32,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 220. [2021-06-05 20:35:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0319634703196345) internal successors, (445), 219 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 445 transitions. [2021-06-05 20:35:32,242 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 445 transitions. Word has length 21 [2021-06-05 20:35:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:32,242 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 445 transitions. [2021-06-05 20:35:32,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 445 transitions. [2021-06-05 20:35:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:32,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:32,243 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:32,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 20:35:32,443 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1665368327, now seen corresponding path program 132 times [2021-06-05 20:35:32,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:32,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69658756] [2021-06-05 20:35:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:32,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:32,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69658756] [2021-06-05 20:35:32,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69658756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:32,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850029456] [2021-06-05 20:35:32,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:32,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:35:32,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:32,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:32,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:33,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850029456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:33,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:33,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:33,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530221204] [2021-06-05 20:35:33,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:33,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:33,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:33,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:33,044 INFO L87 Difference]: Start difference. First operand 220 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:34,081 INFO L93 Difference]: Finished difference Result 435 states and 862 transitions. [2021-06-05 20:35:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:35:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:34,081 INFO L225 Difference]: With dead ends: 435 [2021-06-05 20:35:34,082 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 20:35:34,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 989.7ms TimeCoverageRelationStatistics Valid=405, Invalid=2565, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:35:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 20:35:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 228. [2021-06-05 20:35:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0704845814977975) internal successors, (470), 227 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 470 transitions. [2021-06-05 20:35:34,084 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 470 transitions. Word has length 21 [2021-06-05 20:35:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:34,084 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 470 transitions. [2021-06-05 20:35:34,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 470 transitions. [2021-06-05 20:35:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:34,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:34,085 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:34,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:34,288 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:34,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1658045507, now seen corresponding path program 133 times [2021-06-05 20:35:34,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:34,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728643751] [2021-06-05 20:35:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:34,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:34,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728643751] [2021-06-05 20:35:34,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728643751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:34,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051393417] [2021-06-05 20:35:34,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:34,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:34,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:34,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051393417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:34,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:34,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:34,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107137668] [2021-06-05 20:35:34,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:34,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:34,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:34,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:34,885 INFO L87 Difference]: Start difference. First operand 228 states and 470 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:36,058 INFO L93 Difference]: Finished difference Result 485 states and 970 transitions. [2021-06-05 20:35:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:35:36,059 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:36,059 INFO L225 Difference]: With dead ends: 485 [2021-06-05 20:35:36,059 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 20:35:36,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1146.2ms TimeCoverageRelationStatistics Valid=553, Invalid=3229, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:35:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 20:35:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 232. [2021-06-05 20:35:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.090909090909091) internal successors, (483), 231 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 483 transitions. [2021-06-05 20:35:36,062 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 483 transitions. Word has length 21 [2021-06-05 20:35:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:36,062 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 483 transitions. [2021-06-05 20:35:36,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 483 transitions. [2021-06-05 20:35:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:36,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:36,063 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:36,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:36,263 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:36,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:36,264 INFO L82 PathProgramCache]: Analyzing trace with hash -525632445, now seen corresponding path program 134 times [2021-06-05 20:35:36,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:36,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723029477] [2021-06-05 20:35:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:36,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:36,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723029477] [2021-06-05 20:35:36,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723029477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:36,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473508922] [2021-06-05 20:35:36,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:36,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:36,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:36,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:36,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:36,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473508922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:36,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:36,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:36,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141169355] [2021-06-05 20:35:36,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:36,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:36,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:36,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:36,877 INFO L87 Difference]: Start difference. First operand 232 states and 483 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:38,350 INFO L93 Difference]: Finished difference Result 511 states and 1015 transitions. [2021-06-05 20:35:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 20:35:38,350 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:38,350 INFO L225 Difference]: With dead ends: 511 [2021-06-05 20:35:38,350 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 20:35:38,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1343.5ms TimeCoverageRelationStatistics Valid=678, Invalid=3744, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 20:35:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 20:35:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 228. [2021-06-05 20:35:38,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.066079295154185) internal successors, (469), 227 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 469 transitions. [2021-06-05 20:35:38,353 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 469 transitions. Word has length 21 [2021-06-05 20:35:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:38,354 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 469 transitions. [2021-06-05 20:35:38,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:38,354 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 469 transitions. [2021-06-05 20:35:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:38,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:38,354 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:38,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:38,554 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2115326909, now seen corresponding path program 135 times [2021-06-05 20:35:38,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:38,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198296522] [2021-06-05 20:35:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:38,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:38,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198296522] [2021-06-05 20:35:38,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198296522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:38,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118729990] [2021-06-05 20:35:38,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:38,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:35:38,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:38,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:38,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:39,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118729990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:39,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:39,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:39,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527087096] [2021-06-05 20:35:39,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:39,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:39,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:39,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:39,143 INFO L87 Difference]: Start difference. First operand 228 states and 469 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:40,027 INFO L93 Difference]: Finished difference Result 420 states and 833 transitions. [2021-06-05 20:35:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:35:40,027 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:40,028 INFO L225 Difference]: With dead ends: 420 [2021-06-05 20:35:40,028 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 20:35:40,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1025.2ms TimeCoverageRelationStatistics Valid=479, Invalid=2713, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:35:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 20:35:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 226. [2021-06-05 20:35:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.057777777777778) internal successors, (463), 225 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 463 transitions. [2021-06-05 20:35:40,031 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 463 transitions. Word has length 21 [2021-06-05 20:35:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:40,031 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 463 transitions. [2021-06-05 20:35:40,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 463 transitions. [2021-06-05 20:35:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:40,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:40,031 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:40,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:40,232 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:40,232 INFO L82 PathProgramCache]: Analyzing trace with hash 297499990, now seen corresponding path program 23 times [2021-06-05 20:35:40,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:40,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119028281] [2021-06-05 20:35:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:40,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119028281] [2021-06-05 20:35:40,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119028281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119477130] [2021-06-05 20:35:40,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:40,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:35:40,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:40,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:35:40,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:40,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119477130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:40,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:40,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 20:35:40,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879529057] [2021-06-05 20:35:40,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:35:40,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:35:40,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:35:40,587 INFO L87 Difference]: Start difference. First operand 226 states and 463 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:40,867 INFO L93 Difference]: Finished difference Result 384 states and 763 transitions. [2021-06-05 20:35:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 20:35:40,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:40,868 INFO L225 Difference]: With dead ends: 384 [2021-06-05 20:35:40,868 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 20:35:40,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-06-05 20:35:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 20:35:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 227. [2021-06-05 20:35:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.0486725663716814) internal successors, (463), 226 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 463 transitions. [2021-06-05 20:35:40,870 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 463 transitions. Word has length 21 [2021-06-05 20:35:40,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:40,870 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 463 transitions. [2021-06-05 20:35:40,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,870 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 463 transitions. [2021-06-05 20:35:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:40,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:40,871 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:41,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:41,071 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash -162735104, now seen corresponding path program 24 times [2021-06-05 20:35:41,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199869804] [2021-06-05 20:35:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199869804] [2021-06-05 20:35:41,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199869804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:41,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310899007] [2021-06-05 20:35:41,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:41,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:35:41,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:35:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310899007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:41,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:41,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 20:35:41,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442174214] [2021-06-05 20:35:41,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:35:41,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:35:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:35:41,374 INFO L87 Difference]: Start difference. First operand 227 states and 463 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,768 INFO L93 Difference]: Finished difference Result 420 states and 843 transitions. [2021-06-05 20:35:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:35:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,769 INFO L225 Difference]: With dead ends: 420 [2021-06-05 20:35:41,769 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 20:35:41,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:35:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 20:35:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 235. [2021-06-05 20:35:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.047008547008547) internal successors, (479), 234 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 479 transitions. [2021-06-05 20:35:41,772 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 479 transitions. Word has length 21 [2021-06-05 20:35:41,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,772 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 479 transitions. [2021-06-05 20:35:41,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,772 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 479 transitions. [2021-06-05 20:35:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:41,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,772 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:41,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:41,985 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1039356551, now seen corresponding path program 136 times [2021-06-05 20:35:41,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336485390] [2021-06-05 20:35:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:42,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:42,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336485390] [2021-06-05 20:35:42,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336485390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:42,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506570019] [2021-06-05 20:35:42,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:42,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:35:42,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:42,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:42,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:42,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506570019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:42,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:42,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:42,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779276386] [2021-06-05 20:35:42,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:42,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:42,600 INFO L87 Difference]: Start difference. First operand 235 states and 479 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:43,644 INFO L93 Difference]: Finished difference Result 409 states and 812 transitions. [2021-06-05 20:35:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:35:43,645 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:43,645 INFO L225 Difference]: With dead ends: 409 [2021-06-05 20:35:43,645 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 20:35:43,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1157.7ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:35:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 20:35:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 237. [2021-06-05 20:35:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.042372881355932) internal successors, (482), 236 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 482 transitions. [2021-06-05 20:35:43,652 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 482 transitions. Word has length 21 [2021-06-05 20:35:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:43,652 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 482 transitions. [2021-06-05 20:35:43,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 482 transitions. [2021-06-05 20:35:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:43,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:43,653 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:43,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:43,866 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 476748803, now seen corresponding path program 137 times [2021-06-05 20:35:43,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:43,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400690665] [2021-06-05 20:35:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:44,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:44,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400690665] [2021-06-05 20:35:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400690665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:44,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217397969] [2021-06-05 20:35:44,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:44,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:35:44,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:44,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:44,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:44,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217397969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:44,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:44,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:44,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918884481] [2021-06-05 20:35:44,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:44,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:44,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:44,486 INFO L87 Difference]: Start difference. First operand 237 states and 482 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:45,454 INFO L93 Difference]: Finished difference Result 428 states and 852 transitions. [2021-06-05 20:35:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:35:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:45,455 INFO L225 Difference]: With dead ends: 428 [2021-06-05 20:35:45,455 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 20:35:45,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 983.5ms TimeCoverageRelationStatistics Valid=396, Invalid=2574, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:35:45,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 20:35:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 242. [2021-06-05 20:35:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.0622406639004147) internal successors, (497), 241 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 497 transitions. [2021-06-05 20:35:45,458 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 497 transitions. Word has length 21 [2021-06-05 20:35:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:45,458 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 497 transitions. [2021-06-05 20:35:45,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 497 transitions. [2021-06-05 20:35:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:45,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:45,458 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:45,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:45,659 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash 469425983, now seen corresponding path program 138 times [2021-06-05 20:35:45,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:45,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818278930] [2021-06-05 20:35:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:45,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:45,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818278930] [2021-06-05 20:35:45,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818278930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:45,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323183906] [2021-06-05 20:35:45,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:45,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:35:45,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:45,855 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:45,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:46,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323183906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:46,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:46,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:46,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051967390] [2021-06-05 20:35:46,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:46,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:46,255 INFO L87 Difference]: Start difference. First operand 242 states and 497 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:47,386 INFO L93 Difference]: Finished difference Result 477 states and 953 transitions. [2021-06-05 20:35:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:35:47,387 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:47,387 INFO L225 Difference]: With dead ends: 477 [2021-06-05 20:35:47,387 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 20:35:47,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1108.7ms TimeCoverageRelationStatistics Valid=528, Invalid=3132, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:35:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 20:35:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 243. [2021-06-05 20:35:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.0661157024793386) internal successors, (500), 242 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 500 transitions. [2021-06-05 20:35:47,390 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 500 transitions. Word has length 21 [2021-06-05 20:35:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:47,390 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 500 transitions. [2021-06-05 20:35:47,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 500 transitions. [2021-06-05 20:35:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:47,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:47,391 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:47,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:47,591 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:47,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1714251969, now seen corresponding path program 139 times [2021-06-05 20:35:47,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:47,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838635027] [2021-06-05 20:35:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:47,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:47,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838635027] [2021-06-05 20:35:47,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838635027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:47,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771611659] [2021-06-05 20:35:47,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:47,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:48,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771611659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:48,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:48,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:48,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063952520] [2021-06-05 20:35:48,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:48,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:48,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:48,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:48,193 INFO L87 Difference]: Start difference. First operand 243 states and 500 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:49,570 INFO L93 Difference]: Finished difference Result 480 states and 962 transitions. [2021-06-05 20:35:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 20:35:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:49,571 INFO L225 Difference]: With dead ends: 480 [2021-06-05 20:35:49,571 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 20:35:49,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1255.7ms TimeCoverageRelationStatistics Valid=624, Invalid=3536, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 20:35:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 20:35:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 239. [2021-06-05 20:35:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.042016806722689) internal successors, (486), 238 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 486 transitions. [2021-06-05 20:35:49,574 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 486 transitions. Word has length 21 [2021-06-05 20:35:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:49,574 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 486 transitions. [2021-06-05 20:35:49,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 486 transitions. [2021-06-05 20:35:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:49,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:49,575 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:49,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 20:35:49,775 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:49,775 INFO L82 PathProgramCache]: Analyzing trace with hash -441201387, now seen corresponding path program 140 times [2021-06-05 20:35:49,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:49,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647272238] [2021-06-05 20:35:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:49,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:49,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647272238] [2021-06-05 20:35:49,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647272238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:49,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687849522] [2021-06-05 20:35:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:49,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:49,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:49,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:49,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:50,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687849522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:50,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:50,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:50,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412825209] [2021-06-05 20:35:50,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:50,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:50,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:50,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:50,382 INFO L87 Difference]: Start difference. First operand 239 states and 486 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:51,381 INFO L93 Difference]: Finished difference Result 422 states and 840 transitions. [2021-06-05 20:35:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:35:51,381 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:51,382 INFO L225 Difference]: With dead ends: 422 [2021-06-05 20:35:51,382 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 20:35:51,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1010.1ms TimeCoverageRelationStatistics Valid=411, Invalid=2559, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:35:51,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 20:35:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 245. [2021-06-05 20:35:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.0614754098360657) internal successors, (503), 244 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 503 transitions. [2021-06-05 20:35:51,385 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 503 transitions. Word has length 21 [2021-06-05 20:35:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:51,385 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 503 transitions. [2021-06-05 20:35:51,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 503 transitions. [2021-06-05 20:35:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:51,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:51,385 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:51,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:51,586 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:51,587 INFO L82 PathProgramCache]: Analyzing trace with hash -448524207, now seen corresponding path program 141 times [2021-06-05 20:35:51,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:51,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63325924] [2021-06-05 20:35:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:51,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63325924] [2021-06-05 20:35:51,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63325924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966325807] [2021-06-05 20:35:51,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:51,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:35:51,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:51,785 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:51,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:52,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966325807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:52,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:52,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:52,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440435542] [2021-06-05 20:35:52,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:52,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:52,182 INFO L87 Difference]: Start difference. First operand 245 states and 503 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:53,355 INFO L93 Difference]: Finished difference Result 468 states and 935 transitions. [2021-06-05 20:35:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:35:53,356 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:53,356 INFO L225 Difference]: With dead ends: 468 [2021-06-05 20:35:53,356 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 20:35:53,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1150.2ms TimeCoverageRelationStatistics Valid=546, Invalid=3236, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:35:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 20:35:53,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 243. [2021-06-05 20:35:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.0661157024793386) internal successors, (500), 242 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 500 transitions. [2021-06-05 20:35:53,359 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 500 transitions. Word has length 21 [2021-06-05 20:35:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:53,360 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 500 transitions. [2021-06-05 20:35:53,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 500 transitions. [2021-06-05 20:35:53,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:53,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:53,360 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:53,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 20:35:53,565 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1662765137, now seen corresponding path program 142 times [2021-06-05 20:35:53,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:53,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976811666] [2021-06-05 20:35:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:53,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:53,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976811666] [2021-06-05 20:35:53,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976811666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:53,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865521117] [2021-06-05 20:35:53,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:53,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:35:53,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:53,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:53,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:54,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865521117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:54,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:54,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:54,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730961180] [2021-06-05 20:35:54,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:54,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:54,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:54,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:54,172 INFO L87 Difference]: Start difference. First operand 243 states and 500 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:55,442 INFO L93 Difference]: Finished difference Result 464 states and 931 transitions. [2021-06-05 20:35:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 20:35:55,442 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:55,443 INFO L225 Difference]: With dead ends: 464 [2021-06-05 20:35:55,443 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 20:35:55,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1232.9ms TimeCoverageRelationStatistics Valid=629, Invalid=3403, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:35:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 20:35:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 235. [2021-06-05 20:35:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.0427350427350426) internal successors, (478), 234 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 478 transitions. [2021-06-05 20:35:55,445 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 478 transitions. Word has length 21 [2021-06-05 20:35:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:55,446 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 478 transitions. [2021-06-05 20:35:55,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 478 transitions. [2021-06-05 20:35:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:55,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:55,446 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:55,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:55,646 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:55,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:55,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1239816453, now seen corresponding path program 143 times [2021-06-05 20:35:55,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:55,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479285415] [2021-06-05 20:35:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:55,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:55,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479285415] [2021-06-05 20:35:55,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479285415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:55,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597630190] [2021-06-05 20:35:55,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:55,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:55,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:55,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:55,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:56,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597630190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:56,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:56,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:56,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089897004] [2021-06-05 20:35:56,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:56,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:56,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:56,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:56,245 INFO L87 Difference]: Start difference. First operand 235 states and 478 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:56,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:56,922 INFO L93 Difference]: Finished difference Result 347 states and 689 transitions. [2021-06-05 20:35:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:35:56,923 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:56,923 INFO L225 Difference]: With dead ends: 347 [2021-06-05 20:35:56,923 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 20:35:56,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 818.7ms TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:35:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 20:35:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 235. [2021-06-05 20:35:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.0427350427350426) internal successors, (478), 234 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 478 transitions. [2021-06-05 20:35:56,925 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 478 transitions. Word has length 21 [2021-06-05 20:35:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:56,925 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 478 transitions. [2021-06-05 20:35:56,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:56,926 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 478 transitions. [2021-06-05 20:35:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:56,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:56,926 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:57,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:57,126 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:57,127 INFO L82 PathProgramCache]: Analyzing trace with hash -96906841, now seen corresponding path program 144 times [2021-06-05 20:35:57,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:57,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324772149] [2021-06-05 20:35:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:57,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:57,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324772149] [2021-06-05 20:35:57,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324772149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:57,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096212318] [2021-06-05 20:35:57,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:57,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:35:57,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:57,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:57,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:57,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096212318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:57,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:57,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:57,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156155578] [2021-06-05 20:35:57,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:57,713 INFO L87 Difference]: Start difference. First operand 235 states and 478 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:58,399 INFO L93 Difference]: Finished difference Result 354 states and 700 transitions. [2021-06-05 20:35:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:35:58,399 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:58,400 INFO L225 Difference]: With dead ends: 354 [2021-06-05 20:35:58,400 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 20:35:58,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:35:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 20:35:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 237. [2021-06-05 20:35:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.042372881355932) internal successors, (482), 236 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 482 transitions. [2021-06-05 20:35:58,402 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 482 transitions. Word has length 21 [2021-06-05 20:35:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:58,402 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 482 transitions. [2021-06-05 20:35:58,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 482 transitions. [2021-06-05 20:35:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:58,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:58,403 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:58,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 20:35:58,603 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash 795267865, now seen corresponding path program 145 times [2021-06-05 20:35:58,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:58,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452252667] [2021-06-05 20:35:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:58,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:58,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452252667] [2021-06-05 20:35:58,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452252667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:58,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510611052] [2021-06-05 20:35:58,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:58,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:35:58,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:59,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510611052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:59,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:59,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:35:59,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285453500] [2021-06-05 20:35:59,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:35:59,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:35:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:35:59,191 INFO L87 Difference]: Start difference. First operand 237 states and 482 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:59,858 INFO L93 Difference]: Finished difference Result 352 states and 698 transitions. [2021-06-05 20:35:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:35:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:35:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:59,858 INFO L225 Difference]: With dead ends: 352 [2021-06-05 20:35:59,858 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 20:35:59,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 818.9ms TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:35:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 20:35:59,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 239. [2021-06-05 20:35:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.042016806722689) internal successors, (486), 238 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 486 transitions. [2021-06-05 20:35:59,861 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 486 transitions. Word has length 21 [2021-06-05 20:35:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:59,861 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 486 transitions. [2021-06-05 20:35:59,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 486 transitions. [2021-06-05 20:35:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:35:59,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:59,861 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:00,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:00,062 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1060414699, now seen corresponding path program 146 times [2021-06-05 20:36:00,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:00,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172517923] [2021-06-05 20:36:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:00,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172517923] [2021-06-05 20:36:00,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172517923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13246223] [2021-06-05 20:36:00,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:00,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:00,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:00,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:00,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13246223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:00,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:00,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484157292] [2021-06-05 20:36:00,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:00,632 INFO L87 Difference]: Start difference. First operand 239 states and 486 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:01,464 INFO L93 Difference]: Finished difference Result 361 states and 713 transitions. [2021-06-05 20:36:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:36:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:01,465 INFO L225 Difference]: With dead ends: 361 [2021-06-05 20:36:01,465 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 20:36:01,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 938.5ms TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:36:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 20:36:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 233. [2021-06-05 20:36:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.043103448275862) internal successors, (474), 232 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 474 transitions. [2021-06-05 20:36:01,468 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 474 transitions. Word has length 21 [2021-06-05 20:36:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:01,468 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 474 transitions. [2021-06-05 20:36:01,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 474 transitions. [2021-06-05 20:36:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:01,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:01,468 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:01,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:01,669 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:01,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1028694059, now seen corresponding path program 147 times [2021-06-05 20:36:01,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:01,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727056270] [2021-06-05 20:36:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:01,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:01,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727056270] [2021-06-05 20:36:01,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727056270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:01,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572033800] [2021-06-05 20:36:01,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:01,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:36:01,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:01,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:02,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572033800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:02,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:02,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:02,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413457048] [2021-06-05 20:36:02,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:02,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:02,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:02,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:02,241 INFO L87 Difference]: Start difference. First operand 233 states and 474 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:02,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:02,938 INFO L93 Difference]: Finished difference Result 364 states and 722 transitions. [2021-06-05 20:36:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:36:02,938 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:02,939 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:36:02,939 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:36:02,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 820.0ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:36:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:36:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 237. [2021-06-05 20:36:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.0466101694915255) internal successors, (483), 236 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 483 transitions. [2021-06-05 20:36:02,941 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 483 transitions. Word has length 21 [2021-06-05 20:36:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:02,941 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 483 transitions. [2021-06-05 20:36:02,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 483 transitions. [2021-06-05 20:36:02,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:02,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:02,942 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:03,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:03,142 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:03,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:03,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1920868765, now seen corresponding path program 148 times [2021-06-05 20:36:03,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:03,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067193542] [2021-06-05 20:36:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:03,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:03,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067193542] [2021-06-05 20:36:03,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067193542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:03,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012809298] [2021-06-05 20:36:03,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:03,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:36:03,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:03,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:03,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:03,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012809298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:03,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:03,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:03,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257493226] [2021-06-05 20:36:03,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:03,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:03,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:03,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:03,734 INFO L87 Difference]: Start difference. First operand 237 states and 483 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:04,448 INFO L93 Difference]: Finished difference Result 367 states and 727 transitions. [2021-06-05 20:36:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:36:04,448 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:04,449 INFO L225 Difference]: With dead ends: 367 [2021-06-05 20:36:04,449 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 20:36:04,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 846.3ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:36:04,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 20:36:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 239. [2021-06-05 20:36:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.046218487394958) internal successors, (487), 238 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 487 transitions. [2021-06-05 20:36:04,452 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 487 transitions. Word has length 21 [2021-06-05 20:36:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:04,452 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 487 transitions. [2021-06-05 20:36:04,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 487 transitions. [2021-06-05 20:36:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:04,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:04,453 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:04,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 20:36:04,653 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash 65186201, now seen corresponding path program 149 times [2021-06-05 20:36:04,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:04,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201632552] [2021-06-05 20:36:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:04,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:04,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201632552] [2021-06-05 20:36:04,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201632552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:04,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458773839] [2021-06-05 20:36:04,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:04,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:04,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:04,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:05,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458773839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:05,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:05,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:05,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507943932] [2021-06-05 20:36:05,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:05,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:05,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:05,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:05,225 INFO L87 Difference]: Start difference. First operand 239 states and 487 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:06,382 INFO L93 Difference]: Finished difference Result 377 states and 743 transitions. [2021-06-05 20:36:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:36:06,383 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:06,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:06,383 INFO L225 Difference]: With dead ends: 377 [2021-06-05 20:36:06,383 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 20:36:06,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1133.0ms TimeCoverageRelationStatistics Valid=436, Invalid=2986, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:36:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 20:36:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 235. [2021-06-05 20:36:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.047008547008547) internal successors, (479), 234 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 479 transitions. [2021-06-05 20:36:06,386 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 479 transitions. Word has length 21 [2021-06-05 20:36:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:06,386 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 479 transitions. [2021-06-05 20:36:06,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 479 transitions. [2021-06-05 20:36:06,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:06,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:06,386 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:06,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 20:36:06,587 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:06,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:06,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1680422617, now seen corresponding path program 150 times [2021-06-05 20:36:06,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:06,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417778611] [2021-06-05 20:36:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:06,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:06,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417778611] [2021-06-05 20:36:06,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417778611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:06,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166583041] [2021-06-05 20:36:06,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:06,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:36:06,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:06,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:07,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166583041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:07,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:07,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:07,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936395809] [2021-06-05 20:36:07,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:07,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:07,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:07,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:07,172 INFO L87 Difference]: Start difference. First operand 235 states and 479 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:07,997 INFO L93 Difference]: Finished difference Result 363 states and 721 transitions. [2021-06-05 20:36:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:36:07,997 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:07,998 INFO L225 Difference]: With dead ends: 363 [2021-06-05 20:36:07,998 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 20:36:07,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 911.4ms TimeCoverageRelationStatistics Valid=328, Invalid=2324, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:36:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 20:36:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 239. [2021-06-05 20:36:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.0504201680672267) internal successors, (488), 238 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 488 transitions. [2021-06-05 20:36:08,000 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 488 transitions. Word has length 21 [2021-06-05 20:36:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:08,000 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 488 transitions. [2021-06-05 20:36:08,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 488 transitions. [2021-06-05 20:36:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:08,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:08,001 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:08,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:08,201 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:08,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:08,201 INFO L82 PathProgramCache]: Analyzing trace with hash -175259947, now seen corresponding path program 151 times [2021-06-05 20:36:08,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:08,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414127255] [2021-06-05 20:36:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:08,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:08,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414127255] [2021-06-05 20:36:08,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414127255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:08,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529777712] [2021-06-05 20:36:08,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:08,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:08,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529777712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:08,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:08,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:08,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798930204] [2021-06-05 20:36:08,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:08,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:08,791 INFO L87 Difference]: Start difference. First operand 239 states and 488 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:09,739 INFO L93 Difference]: Finished difference Result 370 states and 732 transitions. [2021-06-05 20:36:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:36:09,740 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:09,740 INFO L225 Difference]: With dead ends: 370 [2021-06-05 20:36:09,740 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 20:36:09,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1022.9ms TimeCoverageRelationStatistics Valid=396, Invalid=2684, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:36:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 20:36:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 237. [2021-06-05 20:36:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.0508474576271185) internal successors, (484), 236 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 484 transitions. [2021-06-05 20:36:09,743 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 484 transitions. Word has length 21 [2021-06-05 20:36:09,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:09,743 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 484 transitions. [2021-06-05 20:36:09,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 484 transitions. [2021-06-05 20:36:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:09,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:09,743 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:09,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 20:36:09,944 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:09,944 INFO L82 PathProgramCache]: Analyzing trace with hash 568458965, now seen corresponding path program 152 times [2021-06-05 20:36:09,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:09,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345108562] [2021-06-05 20:36:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:10,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:10,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345108562] [2021-06-05 20:36:10,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345108562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:10,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950697897] [2021-06-05 20:36:10,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:10,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:10,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:10,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:10,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:10,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950697897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:10,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:10,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:10,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203115634] [2021-06-05 20:36:10,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:10,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:10,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:10,537 INFO L87 Difference]: Start difference. First operand 237 states and 484 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:11,752 INFO L93 Difference]: Finished difference Result 401 states and 798 transitions. [2021-06-05 20:36:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:36:11,752 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:11,753 INFO L225 Difference]: With dead ends: 401 [2021-06-05 20:36:11,753 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 20:36:11,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1136.3ms TimeCoverageRelationStatistics Valid=465, Invalid=3075, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:36:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 20:36:11,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 234. [2021-06-05 20:36:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.03862660944206) internal successors, (475), 233 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 475 transitions. [2021-06-05 20:36:11,756 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 475 transitions. Word has length 21 [2021-06-05 20:36:11,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:11,756 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 475 transitions. [2021-06-05 20:36:11,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 475 transitions. [2021-06-05 20:36:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:11,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:11,756 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:11,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 20:36:11,957 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1933947, now seen corresponding path program 153 times [2021-06-05 20:36:11,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:11,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427867234] [2021-06-05 20:36:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:12,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:12,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427867234] [2021-06-05 20:36:12,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427867234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:12,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579134448] [2021-06-05 20:36:12,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:12,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:36:12,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:12,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:12,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579134448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:12,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:12,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:12,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486192024] [2021-06-05 20:36:12,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:12,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:12,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:12,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:12,552 INFO L87 Difference]: Start difference. First operand 234 states and 475 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:13,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:13,588 INFO L93 Difference]: Finished difference Result 364 states and 728 transitions. [2021-06-05 20:36:13,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:36:13,589 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:13,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:13,589 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:36:13,589 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:36:13,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1026.0ms TimeCoverageRelationStatistics Valid=403, Invalid=2677, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:36:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:36:13,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 235. [2021-06-05 20:36:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.0384615384615383) internal successors, (477), 234 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 477 transitions. [2021-06-05 20:36:13,593 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 477 transitions. Word has length 21 [2021-06-05 20:36:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:13,593 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 477 transitions. [2021-06-05 20:36:13,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 477 transitions. [2021-06-05 20:36:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:13,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:13,593 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:13,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 20:36:13,816 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:13,816 INFO L82 PathProgramCache]: Analyzing trace with hash -916016243, now seen corresponding path program 154 times [2021-06-05 20:36:13,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:13,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166168478] [2021-06-05 20:36:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:13,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:13,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166168478] [2021-06-05 20:36:13,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166168478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:13,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670962889] [2021-06-05 20:36:13,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:14,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:36:14,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:14,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:14,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670962889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:14,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:14,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:14,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015392939] [2021-06-05 20:36:14,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:14,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:14,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:14,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:14,399 INFO L87 Difference]: Start difference. First operand 235 states and 477 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:15,556 INFO L93 Difference]: Finished difference Result 371 states and 742 transitions. [2021-06-05 20:36:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:36:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:15,556 INFO L225 Difference]: With dead ends: 371 [2021-06-05 20:36:15,556 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:36:15,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1098.6ms TimeCoverageRelationStatistics Valid=450, Invalid=2972, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:36:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:36:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 231. [2021-06-05 20:36:15,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.0391304347826087) internal successors, (469), 230 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 469 transitions. [2021-06-05 20:36:15,559 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 469 transitions. Word has length 21 [2021-06-05 20:36:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:15,559 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 469 transitions. [2021-06-05 20:36:15,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 469 transitions. [2021-06-05 20:36:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:15,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:15,559 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:15,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:15,760 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:15,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:15,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1104147985, now seen corresponding path program 155 times [2021-06-05 20:36:15,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:15,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952769308] [2021-06-05 20:36:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:15,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:15,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952769308] [2021-06-05 20:36:15,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952769308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:15,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650357928] [2021-06-05 20:36:15,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:15,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:15,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:15,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:16,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650357928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:16,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:16,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:16,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881520956] [2021-06-05 20:36:16,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:16,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:16,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:16,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:16,338 INFO L87 Difference]: Start difference. First operand 231 states and 469 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:17,075 INFO L93 Difference]: Finished difference Result 342 states and 680 transitions. [2021-06-05 20:36:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:36:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:17,075 INFO L225 Difference]: With dead ends: 342 [2021-06-05 20:36:17,075 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 20:36:17,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:36:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 20:36:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 236. [2021-06-05 20:36:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.0425531914893615) internal successors, (480), 235 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 480 transitions. [2021-06-05 20:36:17,078 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 480 transitions. Word has length 21 [2021-06-05 20:36:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:17,078 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 480 transitions. [2021-06-05 20:36:17,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 480 transitions. [2021-06-05 20:36:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:17,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:17,078 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:17,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 20:36:17,279 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash -211973279, now seen corresponding path program 156 times [2021-06-05 20:36:17,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:17,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625722727] [2021-06-05 20:36:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:17,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:17,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625722727] [2021-06-05 20:36:17,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625722727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:17,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577300537] [2021-06-05 20:36:17,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:17,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:36:17,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:17,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:17,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:17,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577300537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:17,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:17,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:17,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920893115] [2021-06-05 20:36:17,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:17,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:17,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:17,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:17,881 INFO L87 Difference]: Start difference. First operand 236 states and 480 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:18,587 INFO L93 Difference]: Finished difference Result 345 states and 685 transitions. [2021-06-05 20:36:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:36:18,587 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:18,587 INFO L225 Difference]: With dead ends: 345 [2021-06-05 20:36:18,587 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 20:36:18,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 815.1ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:36:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 20:36:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 238. [2021-06-05 20:36:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.042194092827004) internal successors, (484), 237 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 484 transitions. [2021-06-05 20:36:18,590 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 484 transitions. Word has length 21 [2021-06-05 20:36:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:18,590 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 484 transitions. [2021-06-05 20:36:18,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 484 transitions. [2021-06-05 20:36:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:18,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:18,590 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:18,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:18,791 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:18,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2067655843, now seen corresponding path program 157 times [2021-06-05 20:36:18,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:18,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592555195] [2021-06-05 20:36:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:18,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:18,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592555195] [2021-06-05 20:36:18,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592555195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:18,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973273872] [2021-06-05 20:36:18,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:18,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:19,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973273872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:19,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:19,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:19,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937249789] [2021-06-05 20:36:19,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:19,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:19,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:19,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:19,374 INFO L87 Difference]: Start difference. First operand 238 states and 484 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:20,360 INFO L93 Difference]: Finished difference Result 354 states and 700 transitions. [2021-06-05 20:36:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:36:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:20,360 INFO L225 Difference]: With dead ends: 354 [2021-06-05 20:36:20,360 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 20:36:20,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1117.7ms TimeCoverageRelationStatistics Valid=429, Invalid=2877, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:36:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 20:36:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 234. [2021-06-05 20:36:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.0429184549356223) internal successors, (476), 233 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 476 transitions. [2021-06-05 20:36:20,363 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 476 transitions. Word has length 21 [2021-06-05 20:36:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:20,363 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 476 transitions. [2021-06-05 20:36:20,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 476 transitions. [2021-06-05 20:36:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:20,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:20,363 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:20,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:20,564 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:20,564 INFO L82 PathProgramCache]: Analyzing trace with hash -452419427, now seen corresponding path program 158 times [2021-06-05 20:36:20,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:20,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696276113] [2021-06-05 20:36:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:20,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:20,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696276113] [2021-06-05 20:36:20,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696276113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:20,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305464298] [2021-06-05 20:36:20,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:20,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:20,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:20,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:21,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305464298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:21,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:21,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:21,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578789600] [2021-06-05 20:36:21,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:21,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:21,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:21,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:21,186 INFO L87 Difference]: Start difference. First operand 234 states and 476 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:21,975 INFO L93 Difference]: Finished difference Result 353 states and 701 transitions. [2021-06-05 20:36:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:36:21,976 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:21,976 INFO L225 Difference]: With dead ends: 353 [2021-06-05 20:36:21,976 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 20:36:21,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 948.5ms TimeCoverageRelationStatistics Valid=337, Invalid=2315, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:36:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 20:36:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 238. [2021-06-05 20:36:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.0464135021097047) internal successors, (485), 237 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 485 transitions. [2021-06-05 20:36:21,979 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 485 transitions. Word has length 21 [2021-06-05 20:36:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:21,979 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 485 transitions. [2021-06-05 20:36:21,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 485 transitions. [2021-06-05 20:36:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:21,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:21,979 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:22,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 20:36:22,180 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:22,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1986865305, now seen corresponding path program 159 times [2021-06-05 20:36:22,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:22,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805060152] [2021-06-05 20:36:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:22,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:22,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805060152] [2021-06-05 20:36:22,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805060152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:22,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307645328] [2021-06-05 20:36:22,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:22,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:36:22,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:22,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:22,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307645328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:22,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:22,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27798855] [2021-06-05 20:36:22,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:22,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:22,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:22,770 INFO L87 Difference]: Start difference. First operand 238 states and 485 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:23,736 INFO L93 Difference]: Finished difference Result 365 states and 716 transitions. [2021-06-05 20:36:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:36:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:23,737 INFO L225 Difference]: With dead ends: 365 [2021-06-05 20:36:23,737 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 20:36:23,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1031.9ms TimeCoverageRelationStatistics Valid=409, Invalid=2671, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:36:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 20:36:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 241. [2021-06-05 20:36:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.05) internal successors, (492), 240 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 492 transitions. [2021-06-05 20:36:23,740 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 492 transitions. Word has length 21 [2021-06-05 20:36:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:23,740 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 492 transitions. [2021-06-05 20:36:23,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 492 transitions. [2021-06-05 20:36:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:23,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:23,740 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:23,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:23,941 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1564383079, now seen corresponding path program 160 times [2021-06-05 20:36:23,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:23,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046076113] [2021-06-05 20:36:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:24,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046076113] [2021-06-05 20:36:24,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046076113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348612497] [2021-06-05 20:36:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:24,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:36:24,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:24,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:24,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:24,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348612497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:24,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:24,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:24,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318581482] [2021-06-05 20:36:24,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:24,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:24,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:24,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:24,531 INFO L87 Difference]: Start difference. First operand 241 states and 492 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:25,793 INFO L93 Difference]: Finished difference Result 396 states and 782 transitions. [2021-06-05 20:36:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:36:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:25,794 INFO L225 Difference]: With dead ends: 396 [2021-06-05 20:36:25,794 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 20:36:25,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1185.9ms TimeCoverageRelationStatistics Valid=489, Invalid=3051, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:36:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 20:36:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 239. [2021-06-05 20:36:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.042016806722689) internal successors, (486), 238 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 486 transitions. [2021-06-05 20:36:25,796 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 486 transitions. Word has length 21 [2021-06-05 20:36:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:25,796 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 486 transitions. [2021-06-05 20:36:25,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 486 transitions. [2021-06-05 20:36:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:25,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:25,797 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:25,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 20:36:25,997 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:25,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1688008957, now seen corresponding path program 161 times [2021-06-05 20:36:25,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:25,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238847530] [2021-06-05 20:36:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:26,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:26,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238847530] [2021-06-05 20:36:26,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238847530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718382044] [2021-06-05 20:36:26,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:26,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:26,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:26,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:26,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:26,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718382044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:26,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:26,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:26,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377081237] [2021-06-05 20:36:26,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:26,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:26,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:26,592 INFO L87 Difference]: Start difference. First operand 239 states and 486 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:27,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:27,688 INFO L93 Difference]: Finished difference Result 368 states and 736 transitions. [2021-06-05 20:36:27,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:36:27,688 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:27,689 INFO L225 Difference]: With dead ends: 368 [2021-06-05 20:36:27,689 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 20:36:27,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1063.0ms TimeCoverageRelationStatistics Valid=447, Invalid=2745, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:36:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 20:36:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 240. [2021-06-05 20:36:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.0418410041841004) internal successors, (488), 239 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 488 transitions. [2021-06-05 20:36:27,691 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 488 transitions. Word has length 21 [2021-06-05 20:36:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:27,691 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 488 transitions. [2021-06-05 20:36:27,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 488 transitions. [2021-06-05 20:36:27,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:27,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:27,692 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:27,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 20:36:27,892 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1689008149, now seen corresponding path program 162 times [2021-06-05 20:36:27,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:27,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866151186] [2021-06-05 20:36:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:28,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:28,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866151186] [2021-06-05 20:36:28,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866151186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:28,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588591255] [2021-06-05 20:36:28,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:28,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:36:28,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:28,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:28,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588591255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:28,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:28,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:28,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989093314] [2021-06-05 20:36:28,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:28,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:28,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:28,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:28,487 INFO L87 Difference]: Start difference. First operand 240 states and 488 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:29,601 INFO L93 Difference]: Finished difference Result 375 states and 750 transitions. [2021-06-05 20:36:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:36:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:29,602 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:36:29,602 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 20:36:29,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1163.6ms TimeCoverageRelationStatistics Valid=495, Invalid=3045, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:36:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 20:36:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 237. [2021-06-05 20:36:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.042372881355932) internal successors, (482), 236 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 482 transitions. [2021-06-05 20:36:29,604 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 482 transitions. Word has length 21 [2021-06-05 20:36:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:29,604 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 482 transitions. [2021-06-05 20:36:29,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 482 transitions. [2021-06-05 20:36:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:29,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:29,605 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:29,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:29,805 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:29,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:29,806 INFO L82 PathProgramCache]: Analyzing trace with hash 81470105, now seen corresponding path program 163 times [2021-06-05 20:36:29,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:29,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577784800] [2021-06-05 20:36:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:29,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:29,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577784800] [2021-06-05 20:36:29,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577784800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:29,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647470279] [2021-06-05 20:36:29,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:30,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:30,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647470279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:30,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:30,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:30,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749910833] [2021-06-05 20:36:30,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:30,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:30,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:30,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:30,412 INFO L87 Difference]: Start difference. First operand 237 states and 482 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:31,080 INFO L93 Difference]: Finished difference Result 337 states and 671 transitions. [2021-06-05 20:36:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:36:31,080 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:31,081 INFO L225 Difference]: With dead ends: 337 [2021-06-05 20:36:31,081 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 20:36:31,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 853.5ms TimeCoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:36:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 20:36:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 233. [2021-06-05 20:36:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.038793103448276) internal successors, (473), 232 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 473 transitions. [2021-06-05 20:36:31,083 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 473 transitions. Word has length 21 [2021-06-05 20:36:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:31,083 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 473 transitions. [2021-06-05 20:36:31,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 473 transitions. [2021-06-05 20:36:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:31,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:31,083 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:31,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 20:36:31,284 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:31,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1647336811, now seen corresponding path program 164 times [2021-06-05 20:36:31,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:31,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881815433] [2021-06-05 20:36:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:31,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:31,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881815433] [2021-06-05 20:36:31,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881815433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:31,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865039438] [2021-06-05 20:36:31,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:31,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:31,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:31,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:31,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865039438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:31,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:31,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:31,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456839085] [2021-06-05 20:36:31,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:31,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:31,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:31,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:31,878 INFO L87 Difference]: Start difference. First operand 233 states and 473 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:32,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:32,840 INFO L93 Difference]: Finished difference Result 365 states and 730 transitions. [2021-06-05 20:36:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:36:32,840 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:32,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:32,840 INFO L225 Difference]: With dead ends: 365 [2021-06-05 20:36:32,841 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 20:36:32,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1012.8ms TimeCoverageRelationStatistics Valid=442, Invalid=2638, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:36:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 20:36:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 234. [2021-06-05 20:36:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.03862660944206) internal successors, (475), 233 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 475 transitions. [2021-06-05 20:36:32,843 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 475 transitions. Word has length 21 [2021-06-05 20:36:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:32,843 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 475 transitions. [2021-06-05 20:36:32,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 475 transitions. [2021-06-05 20:36:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:32,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:32,844 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:33,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:33,044 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1034063751, now seen corresponding path program 165 times [2021-06-05 20:36:33,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:33,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636757183] [2021-06-05 20:36:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:33,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:33,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636757183] [2021-06-05 20:36:33,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636757183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:33,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730912138] [2021-06-05 20:36:33,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:33,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:36:33,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:33,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:33,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:33,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730912138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:33,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:33,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:33,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263389628] [2021-06-05 20:36:33,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:33,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:33,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:33,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:33,689 INFO L87 Difference]: Start difference. First operand 234 states and 475 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:34,709 INFO L93 Difference]: Finished difference Result 367 states and 734 transitions. [2021-06-05 20:36:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:36:34,709 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:34,710 INFO L225 Difference]: With dead ends: 367 [2021-06-05 20:36:34,710 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 20:36:34,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1092.4ms TimeCoverageRelationStatistics Valid=470, Invalid=2722, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:36:34,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 20:36:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 235. [2021-06-05 20:36:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.0384615384615383) internal successors, (477), 234 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 477 transitions. [2021-06-05 20:36:34,712 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 477 transitions. Word has length 21 [2021-06-05 20:36:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:34,712 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 477 transitions. [2021-06-05 20:36:34,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 477 transitions. [2021-06-05 20:36:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:34,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:34,713 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:34,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 20:36:34,913 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash 116113561, now seen corresponding path program 166 times [2021-06-05 20:36:34,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:34,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428756497] [2021-06-05 20:36:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:35,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428756497] [2021-06-05 20:36:35,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428756497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790769756] [2021-06-05 20:36:35,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:35,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:36:35,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:35,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:35,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:35,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790769756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:35,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:35,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:35,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534194448] [2021-06-05 20:36:35,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:35,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:35,587 INFO L87 Difference]: Start difference. First operand 235 states and 477 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:36,731 INFO L93 Difference]: Finished difference Result 374 states and 748 transitions. [2021-06-05 20:36:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:36:36,731 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:36,731 INFO L225 Difference]: With dead ends: 374 [2021-06-05 20:36:36,732 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:36:36,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1192.8ms TimeCoverageRelationStatistics Valid=523, Invalid=3017, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:36:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:36:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 230. [2021-06-05 20:36:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.039301310043668) internal successors, (467), 229 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 467 transitions. [2021-06-05 20:36:36,734 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 467 transitions. Word has length 21 [2021-06-05 20:36:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:36,734 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 467 transitions. [2021-06-05 20:36:36,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 467 transitions. [2021-06-05 20:36:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:36,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:36,735 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:36,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:36,935 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1917885603, now seen corresponding path program 167 times [2021-06-05 20:36:36,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:36,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016302235] [2021-06-05 20:36:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:37,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:37,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016302235] [2021-06-05 20:36:37,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016302235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:37,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139372288] [2021-06-05 20:36:37,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:37,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:37,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:37,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:37,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:37,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139372288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:37,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:37,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:37,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180659724] [2021-06-05 20:36:37,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:37,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:37,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:37,545 INFO L87 Difference]: Start difference. First operand 230 states and 467 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:38,268 INFO L93 Difference]: Finished difference Result 334 states and 662 transitions. [2021-06-05 20:36:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:36:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:38,269 INFO L225 Difference]: With dead ends: 334 [2021-06-05 20:36:38,269 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 20:36:38,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 823.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:36:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 20:36:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 230. [2021-06-05 20:36:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.039301310043668) internal successors, (467), 229 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 467 transitions. [2021-06-05 20:36:38,271 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 467 transitions. Word has length 21 [2021-06-05 20:36:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:38,271 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 467 transitions. [2021-06-05 20:36:38,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 467 transitions. [2021-06-05 20:36:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:38,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:38,272 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:38,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 20:36:38,472 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1484906987, now seen corresponding path program 168 times [2021-06-05 20:36:38,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:38,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713983484] [2021-06-05 20:36:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:38,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:38,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713983484] [2021-06-05 20:36:38,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713983484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:38,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219228274] [2021-06-05 20:36:38,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:38,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:36:38,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:38,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:39,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219228274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:39,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:39,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:39,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918159113] [2021-06-05 20:36:39,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:39,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:39,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:39,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:39,063 INFO L87 Difference]: Start difference. First operand 230 states and 467 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:39,734 INFO L93 Difference]: Finished difference Result 337 states and 667 transitions. [2021-06-05 20:36:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:36:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:39,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:39,734 INFO L225 Difference]: With dead ends: 337 [2021-06-05 20:36:39,734 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 20:36:39,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 820.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:36:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 20:36:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 232. [2021-06-05 20:36:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.038961038961039) internal successors, (471), 231 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 471 transitions. [2021-06-05 20:36:39,737 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 471 transitions. Word has length 21 [2021-06-05 20:36:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:39,737 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 471 transitions. [2021-06-05 20:36:39,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 471 transitions. [2021-06-05 20:36:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:39,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:39,737 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:39,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 20:36:39,938 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:39,938 INFO L82 PathProgramCache]: Analyzing trace with hash 954377745, now seen corresponding path program 169 times [2021-06-05 20:36:39,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:39,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984117636] [2021-06-05 20:36:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:40,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:40,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984117636] [2021-06-05 20:36:40,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984117636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:40,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715651617] [2021-06-05 20:36:40,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:40,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:40,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:40,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715651617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:40,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:40,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:40,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248848662] [2021-06-05 20:36:40,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:40,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:40,530 INFO L87 Difference]: Start difference. First operand 232 states and 471 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:41,722 INFO L93 Difference]: Finished difference Result 352 states and 694 transitions. [2021-06-05 20:36:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:36:41,723 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:41,723 INFO L225 Difference]: With dead ends: 352 [2021-06-05 20:36:41,723 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 20:36:41,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1157.0ms TimeCoverageRelationStatistics Valid=463, Invalid=3077, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:36:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 20:36:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 228. [2021-06-05 20:36:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.039647577092511) internal successors, (463), 227 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 463 transitions. [2021-06-05 20:36:41,726 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 463 transitions. Word has length 21 [2021-06-05 20:36:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:41,726 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 463 transitions. [2021-06-05 20:36:41,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 463 transitions. [2021-06-05 20:36:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:41,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:41,726 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:41,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:41,926 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:41,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1725353135, now seen corresponding path program 170 times [2021-06-05 20:36:41,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:41,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628465170] [2021-06-05 20:36:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:42,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:42,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628465170] [2021-06-05 20:36:42,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628465170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:42,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164758859] [2021-06-05 20:36:42,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:42,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:42,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:42,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:42,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164758859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:42,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:42,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:42,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755111574] [2021-06-05 20:36:42,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:42,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:42,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:42,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:42,514 INFO L87 Difference]: Start difference. First operand 228 states and 463 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:43,297 INFO L93 Difference]: Finished difference Result 344 states and 681 transitions. [2021-06-05 20:36:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:36:43,298 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:43,298 INFO L225 Difference]: With dead ends: 344 [2021-06-05 20:36:43,298 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 20:36:43,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 885.8ms TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:36:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 20:36:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 232. [2021-06-05 20:36:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.0432900432900434) internal successors, (472), 231 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 472 transitions. [2021-06-05 20:36:43,301 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 472 transitions. Word has length 21 [2021-06-05 20:36:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:43,301 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 472 transitions. [2021-06-05 20:36:43,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 472 transitions. [2021-06-05 20:36:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:43,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:43,301 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:43,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 20:36:43,502 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash 713931597, now seen corresponding path program 171 times [2021-06-05 20:36:43,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:43,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065311902] [2021-06-05 20:36:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:43,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:43,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065311902] [2021-06-05 20:36:43,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065311902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:43,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223303146] [2021-06-05 20:36:43,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:43,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:36:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:43,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:44,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223303146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:44,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:44,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:44,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498641826] [2021-06-05 20:36:44,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:44,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:44,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:44,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:44,092 INFO L87 Difference]: Start difference. First operand 232 states and 472 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:45,139 INFO L93 Difference]: Finished difference Result 364 states and 712 transitions. [2021-06-05 20:36:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:36:45,139 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:45,139 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:36:45,139 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:36:45,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1112.4ms TimeCoverageRelationStatistics Valid=463, Invalid=2959, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:36:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:36:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 230. [2021-06-05 20:36:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.0436681222707422) internal successors, (468), 229 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 468 transitions. [2021-06-05 20:36:45,142 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 468 transitions. Word has length 21 [2021-06-05 20:36:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:45,142 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 468 transitions. [2021-06-05 20:36:45,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 468 transitions. [2021-06-05 20:36:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:45,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:45,142 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:45,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 20:36:45,343 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1457650509, now seen corresponding path program 172 times [2021-06-05 20:36:45,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:45,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622592388] [2021-06-05 20:36:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:45,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:45,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622592388] [2021-06-05 20:36:45,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622592388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:45,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598368524] [2021-06-05 20:36:45,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:45,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:36:45,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:45,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:45,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598368524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:45,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:45,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:45,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667464681] [2021-06-05 20:36:45,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:45,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:45,952 INFO L87 Difference]: Start difference. First operand 230 states and 468 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:47,396 INFO L93 Difference]: Finished difference Result 405 states and 798 transitions. [2021-06-05 20:36:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 20:36:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:47,397 INFO L225 Difference]: With dead ends: 405 [2021-06-05 20:36:47,397 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 20:36:47,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1404.9ms TimeCoverageRelationStatistics Valid=647, Invalid=4045, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:36:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 20:36:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 231. [2021-06-05 20:36:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.0391304347826087) internal successors, (469), 230 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 469 transitions. [2021-06-05 20:36:47,400 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 469 transitions. Word has length 21 [2021-06-05 20:36:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:47,400 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 469 transitions. [2021-06-05 20:36:47,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 469 transitions. [2021-06-05 20:36:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:47,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:47,400 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:47,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:47,601 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:47,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1334024631, now seen corresponding path program 173 times [2021-06-05 20:36:47,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:47,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345993311] [2021-06-05 20:36:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:47,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345993311] [2021-06-05 20:36:47,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345993311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003453434] [2021-06-05 20:36:47,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:47,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:47,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:47,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:47,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:48,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003453434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:48,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:48,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:48,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890042152] [2021-06-05 20:36:48,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:48,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:48,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:48,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:48,197 INFO L87 Difference]: Start difference. First operand 231 states and 469 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:49,462 INFO L93 Difference]: Finished difference Result 371 states and 740 transitions. [2021-06-05 20:36:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 20:36:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:49,463 INFO L225 Difference]: With dead ends: 371 [2021-06-05 20:36:49,463 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:36:49,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1221.5ms TimeCoverageRelationStatistics Valid=568, Invalid=3464, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:36:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:36:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 232. [2021-06-05 20:36:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.038961038961039) internal successors, (471), 231 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 471 transitions. [2021-06-05 20:36:49,466 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 471 transitions. Word has length 21 [2021-06-05 20:36:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:49,466 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 471 transitions. [2021-06-05 20:36:49,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 471 transitions. [2021-06-05 20:36:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:49,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:49,467 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:49,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 20:36:49,681 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash 416074441, now seen corresponding path program 174 times [2021-06-05 20:36:49,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:49,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820088476] [2021-06-05 20:36:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:49,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:49,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820088476] [2021-06-05 20:36:49,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820088476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:49,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728700577] [2021-06-05 20:36:49,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:49,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:36:49,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:49,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:50,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728700577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:50,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:50,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:50,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714344210] [2021-06-05 20:36:50,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:50,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:50,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:50,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:50,276 INFO L87 Difference]: Start difference. First operand 232 states and 471 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:51,681 INFO L93 Difference]: Finished difference Result 376 states and 751 transitions. [2021-06-05 20:36:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 20:36:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:51,681 INFO L225 Difference]: With dead ends: 376 [2021-06-05 20:36:51,681 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 20:36:51,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1283.4ms TimeCoverageRelationStatistics Valid=597, Invalid=3693, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 20:36:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 20:36:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 229. [2021-06-05 20:36:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.039473684210526) internal successors, (465), 228 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 465 transitions. [2021-06-05 20:36:51,684 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 465 transitions. Word has length 21 [2021-06-05 20:36:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:51,684 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 465 transitions. [2021-06-05 20:36:51,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 465 transitions. [2021-06-05 20:36:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:51,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:51,684 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:51,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 20:36:51,885 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:51,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1191463603, now seen corresponding path program 175 times [2021-06-05 20:36:51,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:51,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849238677] [2021-06-05 20:36:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:52,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:52,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849238677] [2021-06-05 20:36:52,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849238677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:52,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123540593] [2021-06-05 20:36:52,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:52,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:52,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123540593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:52,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:52,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:52,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820961032] [2021-06-05 20:36:52,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:52,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:52,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:52,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:52,485 INFO L87 Difference]: Start difference. First operand 229 states and 465 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:53,090 INFO L93 Difference]: Finished difference Result 332 states and 660 transitions. [2021-06-05 20:36:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:36:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:53,091 INFO L225 Difference]: With dead ends: 332 [2021-06-05 20:36:53,091 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 20:36:53,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 817.3ms TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:36:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 20:36:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 227. [2021-06-05 20:36:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.0353982300884956) internal successors, (460), 226 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 460 transitions. [2021-06-05 20:36:53,093 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 460 transitions. Word has length 21 [2021-06-05 20:36:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:53,093 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 460 transitions. [2021-06-05 20:36:53,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 460 transitions. [2021-06-05 20:36:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:53,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:53,093 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:53,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 20:36:53,294 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:53,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1374696777, now seen corresponding path program 176 times [2021-06-05 20:36:53,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:53,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019901972] [2021-06-05 20:36:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:53,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:53,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019901972] [2021-06-05 20:36:53,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019901972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:53,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814833417] [2021-06-05 20:36:53,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:53,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:53,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:53,491 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:53,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:53,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814833417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:53,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:53,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:53,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999987808] [2021-06-05 20:36:53,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:53,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:53,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:53,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:53,950 INFO L87 Difference]: Start difference. First operand 227 states and 460 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:55,170 INFO L93 Difference]: Finished difference Result 369 states and 736 transitions. [2021-06-05 20:36:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:36:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:55,171 INFO L225 Difference]: With dead ends: 369 [2021-06-05 20:36:55,171 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 20:36:55,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1190.9ms TimeCoverageRelationStatistics Valid=525, Invalid=3015, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:36:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 20:36:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 228. [2021-06-05 20:36:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0352422907488985) internal successors, (462), 227 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 462 transitions. [2021-06-05 20:36:55,174 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 462 transitions. Word has length 21 [2021-06-05 20:36:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:55,174 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 462 transitions. [2021-06-05 20:36:55,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 462 transitions. [2021-06-05 20:36:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:55,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:55,174 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:55,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:55,375 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:55,375 INFO L82 PathProgramCache]: Analyzing trace with hash -238869957, now seen corresponding path program 177 times [2021-06-05 20:36:55,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:55,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819424611] [2021-06-05 20:36:55,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:55,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:55,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819424611] [2021-06-05 20:36:55,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819424611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:55,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346237260] [2021-06-05 20:36:55,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:55,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:36:55,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:55,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:55,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346237260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:55,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:55,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:55,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667734049] [2021-06-05 20:36:55,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:55,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:55,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:55,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:55,968 INFO L87 Difference]: Start difference. First operand 228 states and 462 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:57,126 INFO L93 Difference]: Finished difference Result 369 states and 736 transitions. [2021-06-05 20:36:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:36:57,126 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:57,126 INFO L225 Difference]: With dead ends: 369 [2021-06-05 20:36:57,126 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 20:36:57,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1110.7ms TimeCoverageRelationStatistics Valid=522, Invalid=3018, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:36:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 20:36:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 229. [2021-06-05 20:36:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.0350877192982457) internal successors, (464), 228 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 464 transitions. [2021-06-05 20:36:57,129 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 464 transitions. Word has length 21 [2021-06-05 20:36:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:57,129 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 464 transitions. [2021-06-05 20:36:57,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 464 transitions. [2021-06-05 20:36:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:57,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:57,130 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:57,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 20:36:57,330 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:57,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:57,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1156820147, now seen corresponding path program 178 times [2021-06-05 20:36:57,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:57,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531694330] [2021-06-05 20:36:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:57,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:57,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531694330] [2021-06-05 20:36:57,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531694330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:57,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503757505] [2021-06-05 20:36:57,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:57,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:36:57,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:57,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:57,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503757505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:57,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:57,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:57,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640241804] [2021-06-05 20:36:57,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:57,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:57,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:57,921 INFO L87 Difference]: Start difference. First operand 229 states and 464 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:59,180 INFO L93 Difference]: Finished difference Result 369 states and 736 transitions. [2021-06-05 20:36:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:36:59,180 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:36:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:59,180 INFO L225 Difference]: With dead ends: 369 [2021-06-05 20:36:59,181 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 20:36:59,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1167.5ms TimeCoverageRelationStatistics Valid=544, Invalid=3116, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:36:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 20:36:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 225. [2021-06-05 20:36:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-06-05 20:36:59,183 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 21 [2021-06-05 20:36:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:59,183 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-06-05 20:36:59,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-06-05 20:36:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:36:59,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:59,183 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:59,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 20:36:59,384 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash 146103611, now seen corresponding path program 179 times [2021-06-05 20:36:59,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:59,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261059571] [2021-06-05 20:36:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:59,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:59,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261059571] [2021-06-05 20:36:59,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261059571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:59,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371740159] [2021-06-05 20:36:59,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:59,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:36:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:59,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:36:59,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:59,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371740159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:59,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:59,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:36:59,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758080706] [2021-06-05 20:36:59,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:36:59,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:36:59,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:36:59,984 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:00,665 INFO L93 Difference]: Finished difference Result 326 states and 647 transitions. [2021-06-05 20:37:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:37:00,665 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:00,665 INFO L225 Difference]: With dead ends: 326 [2021-06-05 20:37:00,665 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 20:37:00,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 818.3ms TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:37:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 20:37:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 223. [2021-06-05 20:37:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.036036036036036) internal successors, (452), 222 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 452 transitions. [2021-06-05 20:37:00,668 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 452 transitions. Word has length 21 [2021-06-05 20:37:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:00,668 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 452 transitions. [2021-06-05 20:37:00,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 452 transitions. [2021-06-05 20:37:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:00,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:00,668 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:00,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:00,869 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:00,869 INFO L82 PathProgramCache]: Analyzing trace with hash -965860041, now seen corresponding path program 180 times [2021-06-05 20:37:00,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:00,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111090048] [2021-06-05 20:37:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:01,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:01,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111090048] [2021-06-05 20:37:01,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111090048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:01,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400626929] [2021-06-05 20:37:01,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:01,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:37:01,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:01,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:01,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:01,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400626929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:01,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:01,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:01,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385286396] [2021-06-05 20:37:01,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:01,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:01,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:01,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:01,475 INFO L87 Difference]: Start difference. First operand 223 states and 452 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:02,696 INFO L93 Difference]: Finished difference Result 374 states and 743 transitions. [2021-06-05 20:37:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:37:02,697 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:02,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:02,697 INFO L225 Difference]: With dead ends: 374 [2021-06-05 20:37:02,697 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:37:02,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1126.0ms TimeCoverageRelationStatistics Valid=503, Invalid=3037, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:37:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:37:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 222. [2021-06-05 20:37:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.0316742081447963) internal successors, (449), 221 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 449 transitions. [2021-06-05 20:37:02,699 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 449 transitions. Word has length 21 [2021-06-05 20:37:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:02,700 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 449 transitions. [2021-06-05 20:37:02,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:02,700 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 449 transitions. [2021-06-05 20:37:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:02,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:02,700 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:02,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:02,900 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:02,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash -583139653, now seen corresponding path program 181 times [2021-06-05 20:37:02,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:02,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635204674] [2021-06-05 20:37:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:03,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:03,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635204674] [2021-06-05 20:37:03,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635204674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:03,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240305713] [2021-06-05 20:37:03,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:03,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:03,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:03,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240305713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:03,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:03,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:03,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121851812] [2021-06-05 20:37:03,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:03,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:03,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:03,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:03,526 INFO L87 Difference]: Start difference. First operand 222 states and 449 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:04,784 INFO L93 Difference]: Finished difference Result 357 states and 712 transitions. [2021-06-05 20:37:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:37:04,785 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:04,785 INFO L225 Difference]: With dead ends: 357 [2021-06-05 20:37:04,785 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 20:37:04,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1116.8ms TimeCoverageRelationStatistics Valid=453, Invalid=2739, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:37:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 20:37:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 223. [2021-06-05 20:37:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.0315315315315314) internal successors, (451), 222 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 451 transitions. [2021-06-05 20:37:04,788 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 451 transitions. Word has length 21 [2021-06-05 20:37:04,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:04,788 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 451 transitions. [2021-06-05 20:37:04,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:04,788 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 451 transitions. [2021-06-05 20:37:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:04,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:04,788 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:04,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:04,989 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1501089843, now seen corresponding path program 182 times [2021-06-05 20:37:04,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:04,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450408253] [2021-06-05 20:37:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:05,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:05,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450408253] [2021-06-05 20:37:05,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450408253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:05,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816513106] [2021-06-05 20:37:05,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:05,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:05,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:05,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:05,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816513106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:05,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:05,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:05,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509945134] [2021-06-05 20:37:05,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:05,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:05,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:05,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:05,583 INFO L87 Difference]: Start difference. First operand 223 states and 451 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:06,754 INFO L93 Difference]: Finished difference Result 361 states and 720 transitions. [2021-06-05 20:37:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:37:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:06,754 INFO L225 Difference]: With dead ends: 361 [2021-06-05 20:37:06,754 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 20:37:06,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1119.8ms TimeCoverageRelationStatistics Valid=503, Invalid=3037, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:37:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 20:37:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 221. [2021-06-05 20:37:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.0318181818181817) internal successors, (447), 220 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 447 transitions. [2021-06-05 20:37:06,757 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 447 transitions. Word has length 21 [2021-06-05 20:37:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:06,757 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 447 transitions. [2021-06-05 20:37:06,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 447 transitions. [2021-06-05 20:37:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:06,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:06,758 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:06,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 20:37:06,958 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:06,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1582703305, now seen corresponding path program 183 times [2021-06-05 20:37:06,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:06,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145450769] [2021-06-05 20:37:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:07,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:07,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145450769] [2021-06-05 20:37:07,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145450769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:07,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149350300] [2021-06-05 20:37:07,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:07,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:37:07,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:07,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:07,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149350300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:07,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:07,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:07,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529578461] [2021-06-05 20:37:07,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:07,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:07,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:07,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:07,565 INFO L87 Difference]: Start difference. First operand 221 states and 447 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:08,665 INFO L93 Difference]: Finished difference Result 361 states and 720 transitions. [2021-06-05 20:37:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:37:08,665 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:08,665 INFO L225 Difference]: With dead ends: 361 [2021-06-05 20:37:08,665 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 20:37:08,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1069.0ms TimeCoverageRelationStatistics Valid=472, Invalid=2834, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:37:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 20:37:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 222. [2021-06-05 20:37:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.0316742081447963) internal successors, (449), 221 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 449 transitions. [2021-06-05 20:37:08,668 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 449 transitions. Word has length 21 [2021-06-05 20:37:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:08,668 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 449 transitions. [2021-06-05 20:37:08,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 449 transitions. [2021-06-05 20:37:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:08,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:08,669 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:08,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 20:37:08,869 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1098697257, now seen corresponding path program 184 times [2021-06-05 20:37:08,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:08,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667209120] [2021-06-05 20:37:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:09,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667209120] [2021-06-05 20:37:09,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667209120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080953706] [2021-06-05 20:37:09,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:09,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:37:09,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:09,065 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:09,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:09,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080953706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:09,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:09,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:09,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415829611] [2021-06-05 20:37:09,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:09,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:09,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:09,465 INFO L87 Difference]: Start difference. First operand 222 states and 449 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:10,538 INFO L93 Difference]: Finished difference Result 361 states and 720 transitions. [2021-06-05 20:37:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:37:10,539 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:10,539 INFO L225 Difference]: With dead ends: 361 [2021-06-05 20:37:10,539 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 20:37:10,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1051.1ms TimeCoverageRelationStatistics Valid=470, Invalid=2836, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:37:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 20:37:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 223. [2021-06-05 20:37:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.0315315315315314) internal successors, (451), 222 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 451 transitions. [2021-06-05 20:37:10,541 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 451 transitions. Word has length 21 [2021-06-05 20:37:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:10,542 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 451 transitions. [2021-06-05 20:37:10,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 451 transitions. [2021-06-05 20:37:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:10,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:10,542 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:10,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 20:37:10,742 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:10,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:10,743 INFO L82 PathProgramCache]: Analyzing trace with hash 180747067, now seen corresponding path program 185 times [2021-06-05 20:37:10,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:10,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791958620] [2021-06-05 20:37:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:10,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:10,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791958620] [2021-06-05 20:37:10,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791958620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:10,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549135287] [2021-06-05 20:37:10,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:10,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:37:10,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:10,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:10,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:11,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549135287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:11,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:11,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:11,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118530042] [2021-06-05 20:37:11,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:11,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:11,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:11,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:11,371 INFO L87 Difference]: Start difference. First operand 223 states and 451 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:12,402 INFO L93 Difference]: Finished difference Result 357 states and 712 transitions. [2021-06-05 20:37:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:37:12,402 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:12,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:12,403 INFO L225 Difference]: With dead ends: 357 [2021-06-05 20:37:12,403 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 20:37:12,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1119.7ms TimeCoverageRelationStatistics Valid=494, Invalid=2928, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:37:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 20:37:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 220. [2021-06-05 20:37:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0319634703196345) internal successors, (445), 219 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 445 transitions. [2021-06-05 20:37:12,405 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 445 transitions. Word has length 21 [2021-06-05 20:37:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:12,406 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 445 transitions. [2021-06-05 20:37:12,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 445 transitions. [2021-06-05 20:37:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:12,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:12,406 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:12,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 20:37:12,606 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:12,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1853212997, now seen corresponding path program 186 times [2021-06-05 20:37:12,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:12,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012055333] [2021-06-05 20:37:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:12,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:12,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012055333] [2021-06-05 20:37:12,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012055333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:12,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924382229] [2021-06-05 20:37:12,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:12,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:37:12,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:12,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:13,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924382229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:13,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:13,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:13,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102156151] [2021-06-05 20:37:13,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:13,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:13,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:13,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:13,211 INFO L87 Difference]: Start difference. First operand 220 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:14,459 INFO L93 Difference]: Finished difference Result 375 states and 748 transitions. [2021-06-05 20:37:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:37:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:14,460 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:37:14,460 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 20:37:14,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1134.4ms TimeCoverageRelationStatistics Valid=489, Invalid=3051, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:37:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 20:37:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 218. [2021-06-05 20:37:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.0230414746543777) internal successors, (439), 217 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 439 transitions. [2021-06-05 20:37:14,463 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 439 transitions. Word has length 21 [2021-06-05 20:37:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:14,463 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 439 transitions. [2021-06-05 20:37:14,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 439 transitions. [2021-06-05 20:37:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:14,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:14,463 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:14,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 20:37:14,665 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1253134775, now seen corresponding path program 187 times [2021-06-05 20:37:14,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:14,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130038229] [2021-06-05 20:37:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:14,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:14,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130038229] [2021-06-05 20:37:14,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130038229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:14,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906764641] [2021-06-05 20:37:14,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:14,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:14,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:15,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906764641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:15,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:15,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:15,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142783724] [2021-06-05 20:37:15,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:15,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:15,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:15,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:15,254 INFO L87 Difference]: Start difference. First operand 218 states and 439 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:16,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:16,413 INFO L93 Difference]: Finished difference Result 365 states and 726 transitions. [2021-06-05 20:37:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:37:16,413 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:16,414 INFO L225 Difference]: With dead ends: 365 [2021-06-05 20:37:16,414 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 20:37:16,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1070.2ms TimeCoverageRelationStatistics Valid=470, Invalid=2952, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:37:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 20:37:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 217. [2021-06-05 20:37:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0185185185185186) internal successors, (436), 216 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 436 transitions. [2021-06-05 20:37:16,416 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 436 transitions. Word has length 21 [2021-06-05 20:37:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:16,416 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 436 transitions. [2021-06-05 20:37:16,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 436 transitions. [2021-06-05 20:37:16,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:16,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:16,417 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:16,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:16,617 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash 335184585, now seen corresponding path program 188 times [2021-06-05 20:37:16,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:16,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735967510] [2021-06-05 20:37:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:16,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:16,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735967510] [2021-06-05 20:37:16,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735967510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:16,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777074016] [2021-06-05 20:37:16,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:16,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:16,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:16,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:16,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:17,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777074016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:17,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:17,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:17,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29749922] [2021-06-05 20:37:17,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:17,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:17,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:17,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:17,208 INFO L87 Difference]: Start difference. First operand 217 states and 436 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:18,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:18,377 INFO L93 Difference]: Finished difference Result 357 states and 707 transitions. [2021-06-05 20:37:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:37:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:18,377 INFO L225 Difference]: With dead ends: 357 [2021-06-05 20:37:18,378 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 20:37:18,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1131.7ms TimeCoverageRelationStatistics Valid=494, Invalid=3046, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:37:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 20:37:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 205. [2021-06-05 20:37:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.0049019607843137) internal successors, (409), 204 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 409 transitions. [2021-06-05 20:37:18,380 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 409 transitions. Word has length 21 [2021-06-05 20:37:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:18,380 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 409 transitions. [2021-06-05 20:37:18,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 409 transitions. [2021-06-05 20:37:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:18,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:18,380 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:18,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 20:37:18,581 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1170210543, now seen corresponding path program 189 times [2021-06-05 20:37:18,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:18,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500606168] [2021-06-05 20:37:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:18,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:18,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500606168] [2021-06-05 20:37:18,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500606168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:18,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197137407] [2021-06-05 20:37:18,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:18,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:37:18,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:18,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:19,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197137407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:19,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:19,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:19,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469286914] [2021-06-05 20:37:19,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:19,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:19,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:19,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:19,292 INFO L87 Difference]: Start difference. First operand 205 states and 409 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:19,985 INFO L93 Difference]: Finished difference Result 314 states and 616 transitions. [2021-06-05 20:37:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:37:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:19,986 INFO L225 Difference]: With dead ends: 314 [2021-06-05 20:37:19,986 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 20:37:19,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 921.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:37:19,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 20:37:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 210. [2021-06-05 20:37:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0095693779904304) internal successors, (420), 209 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 420 transitions. [2021-06-05 20:37:19,988 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 420 transitions. Word has length 21 [2021-06-05 20:37:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:19,988 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 420 transitions. [2021-06-05 20:37:19,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 420 transitions. [2021-06-05 20:37:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:19,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:19,989 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:20,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:20,189 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash -278035837, now seen corresponding path program 190 times [2021-06-05 20:37:20,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:20,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483777031] [2021-06-05 20:37:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:20,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483777031] [2021-06-05 20:37:20,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483777031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476986645] [2021-06-05 20:37:20,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:20,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:37:20,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:20,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:20,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:20,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476986645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:20,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:20,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:20,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486888568] [2021-06-05 20:37:20,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:20,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:20,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:20,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:20,778 INFO L87 Difference]: Start difference. First operand 210 states and 420 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:21,373 INFO L93 Difference]: Finished difference Result 317 states and 621 transitions. [2021-06-05 20:37:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:37:21,373 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:21,374 INFO L225 Difference]: With dead ends: 317 [2021-06-05 20:37:21,374 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 20:37:21,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 813.2ms TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:37:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 20:37:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 212. [2021-06-05 20:37:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.009478672985782) internal successors, (424), 211 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 424 transitions. [2021-06-05 20:37:21,376 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 424 transitions. Word has length 21 [2021-06-05 20:37:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:21,376 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 424 transitions. [2021-06-05 20:37:21,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 424 transitions. [2021-06-05 20:37:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:21,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:21,376 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:21,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:21,577 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2133718401, now seen corresponding path program 191 times [2021-06-05 20:37:21,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:21,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141032272] [2021-06-05 20:37:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:21,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:21,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141032272] [2021-06-05 20:37:21,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141032272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:21,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043610497] [2021-06-05 20:37:21,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:21,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:21,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:21,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:21,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:22,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043610497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:22,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:22,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:22,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640356973] [2021-06-05 20:37:22,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:22,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:22,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:22,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:22,155 INFO L87 Difference]: Start difference. First operand 212 states and 424 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:23,286 INFO L93 Difference]: Finished difference Result 345 states and 669 transitions. [2021-06-05 20:37:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:37:23,286 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:23,287 INFO L225 Difference]: With dead ends: 345 [2021-06-05 20:37:23,287 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 20:37:23,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1121.3ms TimeCoverageRelationStatistics Valid=445, Invalid=2977, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:37:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 20:37:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 216. [2021-06-05 20:37:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0186046511627906) internal successors, (434), 215 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 434 transitions. [2021-06-05 20:37:23,289 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 434 transitions. Word has length 21 [2021-06-05 20:37:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:23,289 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 434 transitions. [2021-06-05 20:37:23,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 434 transitions. [2021-06-05 20:37:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:23,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:23,290 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:23,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:23,493 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:23,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2141041221, now seen corresponding path program 192 times [2021-06-05 20:37:23,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:23,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506464625] [2021-06-05 20:37:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:23,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:23,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506464625] [2021-06-05 20:37:23,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506464625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:23,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452784146] [2021-06-05 20:37:23,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:23,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:37:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:23,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:24,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452784146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:24,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:24,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:24,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817323640] [2021-06-05 20:37:24,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:24,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:24,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:24,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:24,078 INFO L87 Difference]: Start difference. First operand 216 states and 434 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:25,020 INFO L93 Difference]: Finished difference Result 346 states and 679 transitions. [2021-06-05 20:37:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:37:25,020 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:25,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:25,021 INFO L225 Difference]: With dead ends: 346 [2021-06-05 20:37:25,021 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 20:37:25,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1048.6ms TimeCoverageRelationStatistics Valid=423, Invalid=2769, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:37:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 20:37:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 208. [2021-06-05 20:37:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.0096618357487923) internal successors, (416), 207 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 416 transitions. [2021-06-05 20:37:25,023 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 416 transitions. Word has length 21 [2021-06-05 20:37:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:25,023 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 416 transitions. [2021-06-05 20:37:25,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 416 transitions. [2021-06-05 20:37:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:25,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:25,024 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:25,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:25,224 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash -518481985, now seen corresponding path program 193 times [2021-06-05 20:37:25,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:25,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606981481] [2021-06-05 20:37:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:25,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:25,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606981481] [2021-06-05 20:37:25,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606981481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:25,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13803960] [2021-06-05 20:37:25,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:25,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:25,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:25,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13803960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:25,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:25,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:25,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690296462] [2021-06-05 20:37:25,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:25,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:25,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:25,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:25,818 INFO L87 Difference]: Start difference. First operand 208 states and 416 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:26,516 INFO L93 Difference]: Finished difference Result 324 states and 635 transitions. [2021-06-05 20:37:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:37:26,517 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:26,517 INFO L225 Difference]: With dead ends: 324 [2021-06-05 20:37:26,517 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 20:37:26,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 894.0ms TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:37:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 20:37:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 212. [2021-06-05 20:37:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.014218009478673) internal successors, (425), 211 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 425 transitions. [2021-06-05 20:37:26,520 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 425 transitions. Word has length 21 [2021-06-05 20:37:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:26,520 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 425 transitions. [2021-06-05 20:37:26,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 425 transitions. [2021-06-05 20:37:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:26,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:26,520 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:26,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 20:37:26,720 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1920802747, now seen corresponding path program 194 times [2021-06-05 20:37:26,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:26,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348196725] [2021-06-05 20:37:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:26,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:26,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348196725] [2021-06-05 20:37:26,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348196725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:26,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645862554] [2021-06-05 20:37:26,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:26,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:26,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:26,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:26,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:27,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645862554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:27,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:27,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:27,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003411172] [2021-06-05 20:37:27,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:27,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:27,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:27,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:27,305 INFO L87 Difference]: Start difference. First operand 212 states and 425 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:28,359 INFO L93 Difference]: Finished difference Result 356 states and 685 transitions. [2021-06-05 20:37:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:37:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:28,360 INFO L225 Difference]: With dead ends: 356 [2021-06-05 20:37:28,360 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 20:37:28,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1034.1ms TimeCoverageRelationStatistics Valid=423, Invalid=2769, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:37:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 20:37:28,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 221. [2021-06-05 20:37:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.0272727272727273) internal successors, (446), 220 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 446 transitions. [2021-06-05 20:37:28,363 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 446 transitions. Word has length 21 [2021-06-05 20:37:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:28,363 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 446 transitions. [2021-06-05 20:37:28,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 446 transitions. [2021-06-05 20:37:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:28,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:28,363 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:28,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 20:37:28,564 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1913479927, now seen corresponding path program 195 times [2021-06-05 20:37:28,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:28,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435724587] [2021-06-05 20:37:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:28,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:28,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435724587] [2021-06-05 20:37:28,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435724587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:28,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119725942] [2021-06-05 20:37:28,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:28,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:37:28,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:28,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:28,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:29,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119725942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:29,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:29,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:29,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961946835] [2021-06-05 20:37:29,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:29,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:29,144 INFO L87 Difference]: Start difference. First operand 221 states and 446 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:30,072 INFO L93 Difference]: Finished difference Result 357 states and 695 transitions. [2021-06-05 20:37:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:37:30,072 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:30,073 INFO L225 Difference]: With dead ends: 357 [2021-06-05 20:37:30,073 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 20:37:30,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 964.2ms TimeCoverageRelationStatistics Valid=405, Invalid=2565, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:37:30,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 20:37:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 215. [2021-06-05 20:37:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.0186915887850465) internal successors, (432), 214 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 432 transitions. [2021-06-05 20:37:30,075 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 432 transitions. Word has length 21 [2021-06-05 20:37:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:30,075 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 432 transitions. [2021-06-05 20:37:30,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 432 transitions. [2021-06-05 20:37:30,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:30,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:30,076 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:30,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 20:37:30,276 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1630445637, now seen corresponding path program 196 times [2021-06-05 20:37:30,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:30,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835939242] [2021-06-05 20:37:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:30,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835939242] [2021-06-05 20:37:30,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835939242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235501604] [2021-06-05 20:37:30,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:30,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:37:30,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:30,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:30,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235501604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:30,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:30,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:30,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013537546] [2021-06-05 20:37:30,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:30,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:30,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:30,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:30,875 INFO L87 Difference]: Start difference. First operand 215 states and 432 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:32,395 INFO L93 Difference]: Finished difference Result 395 states and 769 transitions. [2021-06-05 20:37:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 20:37:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:32,396 INFO L225 Difference]: With dead ends: 395 [2021-06-05 20:37:32,396 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 20:37:32,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1344.9ms TimeCoverageRelationStatistics Valid=605, Invalid=3817, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 20:37:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 20:37:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 224. [2021-06-05 20:37:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0448430493273544) internal successors, (456), 223 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 456 transitions. [2021-06-05 20:37:32,399 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 456 transitions. Word has length 21 [2021-06-05 20:37:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:32,399 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 456 transitions. [2021-06-05 20:37:32,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 456 transitions. [2021-06-05 20:37:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:32,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:32,399 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:32,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 20:37:32,599 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:32,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1637768457, now seen corresponding path program 197 times [2021-06-05 20:37:32,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:32,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434577445] [2021-06-05 20:37:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:32,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434577445] [2021-06-05 20:37:32,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434577445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859790074] [2021-06-05 20:37:32,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:32,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:32,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:32,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:32,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859790074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:33,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:33,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356575199] [2021-06-05 20:37:33,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:33,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:33,179 INFO L87 Difference]: Start difference. First operand 224 states and 456 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:34,534 INFO L93 Difference]: Finished difference Result 408 states and 793 transitions. [2021-06-05 20:37:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 20:37:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:34,534 INFO L225 Difference]: With dead ends: 408 [2021-06-05 20:37:34,534 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 20:37:34,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1272.3ms TimeCoverageRelationStatistics Valid=600, Invalid=3690, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 20:37:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 20:37:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 220. [2021-06-05 20:37:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.036529680365297) internal successors, (446), 219 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 446 transitions. [2021-06-05 20:37:34,537 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 446 transitions. Word has length 21 [2021-06-05 20:37:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:34,537 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 446 transitions. [2021-06-05 20:37:34,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 446 transitions. [2021-06-05 20:37:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:34,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:34,538 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:34,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:34,738 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:34,738 INFO L82 PathProgramCache]: Analyzing trace with hash 473520887, now seen corresponding path program 198 times [2021-06-05 20:37:34,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:34,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894123866] [2021-06-05 20:37:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:34,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894123866] [2021-06-05 20:37:34,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894123866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873324219] [2021-06-05 20:37:34,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:34,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:37:34,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:34,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:34,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:35,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873324219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:35,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:35,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:35,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607820964] [2021-06-05 20:37:35,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:35,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:35,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:35,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:35,321 INFO L87 Difference]: Start difference. First operand 220 states and 446 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:36,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:36,443 INFO L93 Difference]: Finished difference Result 388 states and 761 transitions. [2021-06-05 20:37:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:37:36,443 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:36,444 INFO L225 Difference]: With dead ends: 388 [2021-06-05 20:37:36,444 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 20:37:36,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1097.9ms TimeCoverageRelationStatistics Valid=490, Invalid=3050, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:37:36,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 20:37:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 216. [2021-06-05 20:37:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.013953488372093) internal successors, (433), 215 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 433 transitions. [2021-06-05 20:37:36,446 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 433 transitions. Word has length 21 [2021-06-05 20:37:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:36,446 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 433 transitions. [2021-06-05 20:37:36,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 433 transitions. [2021-06-05 20:37:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:36,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:36,447 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:36,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 20:37:36,647 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1754071515, now seen corresponding path program 199 times [2021-06-05 20:37:36,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:36,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415568401] [2021-06-05 20:37:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:36,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:36,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415568401] [2021-06-05 20:37:36,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415568401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:36,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742632199] [2021-06-05 20:37:36,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:36,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:36,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:37,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742632199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:37,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:37,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:37,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240284831] [2021-06-05 20:37:37,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:37,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:37,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:37,248 INFO L87 Difference]: Start difference. First operand 216 states and 433 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:38,487 INFO L93 Difference]: Finished difference Result 371 states and 732 transitions. [2021-06-05 20:37:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:37:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:38,488 INFO L225 Difference]: With dead ends: 371 [2021-06-05 20:37:38,488 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:37:38,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1168.7ms TimeCoverageRelationStatistics Valid=525, Invalid=3257, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:37:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:37:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 221. [2021-06-05 20:37:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.036363636363636) internal successors, (448), 220 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 448 transitions. [2021-06-05 20:37:38,490 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 448 transitions. Word has length 21 [2021-06-05 20:37:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:38,490 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 448 transitions. [2021-06-05 20:37:38,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 448 transitions. [2021-06-05 20:37:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:38,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:38,491 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:38,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:38,693 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:38,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:38,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1761394335, now seen corresponding path program 200 times [2021-06-05 20:37:38,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:38,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846106897] [2021-06-05 20:37:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:38,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:38,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846106897] [2021-06-05 20:37:38,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846106897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:38,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442570060] [2021-06-05 20:37:38,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:38,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:38,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:38,886 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:38,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:39,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442570060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:39,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:39,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:39,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875839228] [2021-06-05 20:37:39,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:39,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:39,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:39,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:39,276 INFO L87 Difference]: Start difference. First operand 221 states and 448 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:40,490 INFO L93 Difference]: Finished difference Result 385 states and 757 transitions. [2021-06-05 20:37:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:37:40,490 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:40,491 INFO L225 Difference]: With dead ends: 385 [2021-06-05 20:37:40,491 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 20:37:40,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1150.6ms TimeCoverageRelationStatistics Valid=550, Invalid=3232, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:37:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 20:37:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 219. [2021-06-05 20:37:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.0275229357798166) internal successors, (442), 218 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 442 transitions. [2021-06-05 20:37:40,494 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 442 transitions. Word has length 21 [2021-06-05 20:37:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:40,495 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 442 transitions. [2021-06-05 20:37:40,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 442 transitions. [2021-06-05 20:37:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:40,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:40,495 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:40,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:40,718 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:40,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:40,718 INFO L82 PathProgramCache]: Analyzing trace with hash 349895009, now seen corresponding path program 201 times [2021-06-05 20:37:40,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:40,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080973799] [2021-06-05 20:37:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:40,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:40,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080973799] [2021-06-05 20:37:40,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080973799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:40,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982763832] [2021-06-05 20:37:40,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:40,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:37:40,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:40,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:41,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982763832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:41,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:41,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:41,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648535359] [2021-06-05 20:37:41,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:41,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:41,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:41,303 INFO L87 Difference]: Start difference. First operand 219 states and 442 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:42,432 INFO L93 Difference]: Finished difference Result 372 states and 736 transitions. [2021-06-05 20:37:42,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:37:42,432 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:42,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:42,433 INFO L225 Difference]: With dead ends: 372 [2021-06-05 20:37:42,433 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 20:37:42,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1094.2ms TimeCoverageRelationStatistics Valid=491, Invalid=3049, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:37:42,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 20:37:42,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 217. [2021-06-05 20:37:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.013888888888889) internal successors, (435), 216 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 435 transitions. [2021-06-05 20:37:42,435 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 435 transitions. Word has length 21 [2021-06-05 20:37:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:42,435 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 435 transitions. [2021-06-05 20:37:42,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 435 transitions. [2021-06-05 20:37:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:42,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:42,436 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:42,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:42,636 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:42,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1622945591, now seen corresponding path program 202 times [2021-06-05 20:37:42,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:42,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310315755] [2021-06-05 20:37:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:42,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:42,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310315755] [2021-06-05 20:37:42,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310315755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:42,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438230012] [2021-06-05 20:37:42,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:42,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:37:42,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:42,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:43,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438230012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:43,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:43,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:43,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173240644] [2021-06-05 20:37:43,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:43,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:43,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:43,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:43,274 INFO L87 Difference]: Start difference. First operand 217 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:44,589 INFO L93 Difference]: Finished difference Result 369 states and 728 transitions. [2021-06-05 20:37:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 20:37:44,589 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:44,589 INFO L225 Difference]: With dead ends: 369 [2021-06-05 20:37:44,589 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 20:37:44,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1258.0ms TimeCoverageRelationStatistics Valid=556, Invalid=3476, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:37:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 20:37:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 223. [2021-06-05 20:37:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.036036036036036) internal successors, (452), 222 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 452 transitions. [2021-06-05 20:37:44,592 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 452 transitions. Word has length 21 [2021-06-05 20:37:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:44,592 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 452 transitions. [2021-06-05 20:37:44,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 452 transitions. [2021-06-05 20:37:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:44,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:44,593 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:44,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:44,793 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:44,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1615622771, now seen corresponding path program 203 times [2021-06-05 20:37:44,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:44,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722762530] [2021-06-05 20:37:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:44,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:44,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722762530] [2021-06-05 20:37:44,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722762530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:44,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140650778] [2021-06-05 20:37:44,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:44,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:44,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:44,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:44,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:45,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140650778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:45,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:45,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:45,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299629589] [2021-06-05 20:37:45,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:45,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:45,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:45,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:45,378 INFO L87 Difference]: Start difference. First operand 223 states and 452 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:46,606 INFO L93 Difference]: Finished difference Result 383 states and 753 transitions. [2021-06-05 20:37:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 20:37:46,606 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:46,607 INFO L225 Difference]: With dead ends: 383 [2021-06-05 20:37:46,607 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 20:37:46,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1193.4ms TimeCoverageRelationStatistics Valid=570, Invalid=3462, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:37:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 20:37:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 219. [2021-06-05 20:37:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.0275229357798166) internal successors, (442), 218 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 442 transitions. [2021-06-05 20:37:46,610 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 442 transitions. Word has length 21 [2021-06-05 20:37:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:46,610 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 442 transitions. [2021-06-05 20:37:46,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 442 transitions. [2021-06-05 20:37:46,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:46,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:46,610 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:46,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-06-05 20:37:46,810 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash -568055181, now seen corresponding path program 204 times [2021-06-05 20:37:46,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:46,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691065407] [2021-06-05 20:37:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:46,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:46,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691065407] [2021-06-05 20:37:46,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691065407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:46,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760086076] [2021-06-05 20:37:46,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:47,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:37:47,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:47,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:47,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:47,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760086076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:47,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:47,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:47,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911367323] [2021-06-05 20:37:47,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:47,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:47,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:47,401 INFO L87 Difference]: Start difference. First operand 219 states and 442 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:48,558 INFO L93 Difference]: Finished difference Result 375 states and 742 transitions. [2021-06-05 20:37:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:37:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:48,558 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:37:48,558 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:37:48,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1070.9ms TimeCoverageRelationStatistics Valid=482, Invalid=2940, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:37:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:37:48,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 214. [2021-06-05 20:37:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0140845070422535) internal successors, (429), 213 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:48,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 429 transitions. [2021-06-05 20:37:48,561 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 429 transitions. Word has length 21 [2021-06-05 20:37:48,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:48,561 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 429 transitions. [2021-06-05 20:37:48,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 429 transitions. [2021-06-05 20:37:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:48,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:48,562 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:48,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 20:37:48,769 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash 15407547, now seen corresponding path program 205 times [2021-06-05 20:37:48,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:48,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950512653] [2021-06-05 20:37:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:48,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:48,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950512653] [2021-06-05 20:37:48,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950512653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:48,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608509954] [2021-06-05 20:37:48,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:48,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:49,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608509954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:49,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:49,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335500586] [2021-06-05 20:37:49,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:49,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:49,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:49,375 INFO L87 Difference]: Start difference. First operand 214 states and 429 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:50,015 INFO L93 Difference]: Finished difference Result 312 states and 614 transitions. [2021-06-05 20:37:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:37:50,016 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:50,016 INFO L225 Difference]: With dead ends: 312 [2021-06-05 20:37:50,016 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 20:37:50,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:37:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 20:37:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 212. [2021-06-05 20:37:50,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.009478672985782) internal successors, (424), 211 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 424 transitions. [2021-06-05 20:37:50,020 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 424 transitions. Word has length 21 [2021-06-05 20:37:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:50,020 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 424 transitions. [2021-06-05 20:37:50,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:50,020 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 424 transitions. [2021-06-05 20:37:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:50,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:50,021 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:50,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:50,225 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1713399369, now seen corresponding path program 206 times [2021-06-05 20:37:50,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:50,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127740355] [2021-06-05 20:37:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:50,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:50,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127740355] [2021-06-05 20:37:50,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127740355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:50,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748688026] [2021-06-05 20:37:50,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:50,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:50,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:50,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:50,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748688026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:50,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:50,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:50,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550240159] [2021-06-05 20:37:50,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:50,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:50,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:50,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:50,831 INFO L87 Difference]: Start difference. First operand 212 states and 424 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:51,889 INFO L93 Difference]: Finished difference Result 364 states and 718 transitions. [2021-06-05 20:37:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:37:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:51,890 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:37:51,890 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:37:51,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1066.5ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:37:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:37:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 218. [2021-06-05 20:37:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.0368663594470044) internal successors, (442), 217 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 442 transitions. [2021-06-05 20:37:51,893 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 442 transitions. Word has length 21 [2021-06-05 20:37:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:51,893 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 442 transitions. [2021-06-05 20:37:51,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 442 transitions. [2021-06-05 20:37:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:51,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:51,893 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:52,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 20:37:52,097 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1720722189, now seen corresponding path program 207 times [2021-06-05 20:37:52,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:52,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694206305] [2021-06-05 20:37:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:52,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:52,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694206305] [2021-06-05 20:37:52,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694206305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:52,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463986852] [2021-06-05 20:37:52,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:52,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:37:52,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:52,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:52,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463986852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:52,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:52,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:52,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656646172] [2021-06-05 20:37:52,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:52,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:52,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:52,701 INFO L87 Difference]: Start difference. First operand 218 states and 442 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:53,863 INFO L93 Difference]: Finished difference Result 378 states and 743 transitions. [2021-06-05 20:37:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:37:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:53,864 INFO L225 Difference]: With dead ends: 378 [2021-06-05 20:37:53,864 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:37:53,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1088.7ms TimeCoverageRelationStatistics Valid=524, Invalid=2898, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:37:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:37:53,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 216. [2021-06-05 20:37:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.027906976744186) internal successors, (436), 215 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 436 transitions. [2021-06-05 20:37:53,867 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 436 transitions. Word has length 21 [2021-06-05 20:37:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:53,867 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 436 transitions. [2021-06-05 20:37:53,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 436 transitions. [2021-06-05 20:37:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:53,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:53,867 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:54,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 20:37:54,068 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash 390567155, now seen corresponding path program 208 times [2021-06-05 20:37:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:54,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090864572] [2021-06-05 20:37:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:54,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:54,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090864572] [2021-06-05 20:37:54,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090864572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:54,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228426541] [2021-06-05 20:37:54,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:54,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:37:54,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:54,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:54,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:54,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228426541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:54,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:54,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:54,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758438122] [2021-06-05 20:37:54,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:54,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:54,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:54,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:54,667 INFO L87 Difference]: Start difference. First operand 216 states and 436 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:55,770 INFO L93 Difference]: Finished difference Result 387 states and 758 transitions. [2021-06-05 20:37:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:37:55,771 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:55,771 INFO L225 Difference]: With dead ends: 387 [2021-06-05 20:37:55,771 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 20:37:55,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1077.1ms TimeCoverageRelationStatistics Valid=508, Invalid=2914, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:37:55,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 20:37:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 214. [2021-06-05 20:37:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0140845070422535) internal successors, (429), 213 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 429 transitions. [2021-06-05 20:37:55,774 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 429 transitions. Word has length 21 [2021-06-05 20:37:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:55,774 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 429 transitions. [2021-06-05 20:37:55,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 429 transitions. [2021-06-05 20:37:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:55,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:55,774 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:55,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 20:37:55,977 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:55,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:55,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1199127309, now seen corresponding path program 209 times [2021-06-05 20:37:55,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:55,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739316792] [2021-06-05 20:37:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:56,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:56,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739316792] [2021-06-05 20:37:56,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739316792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:56,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774775671] [2021-06-05 20:37:56,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:56,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:37:56,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:56,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:56,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774775671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:56,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:56,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328210053] [2021-06-05 20:37:56,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:56,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:56,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:56,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:56,581 INFO L87 Difference]: Start difference. First operand 214 states and 429 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:57,397 INFO L93 Difference]: Finished difference Result 343 states and 675 transitions. [2021-06-05 20:37:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:37:57,397 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:57,398 INFO L225 Difference]: With dead ends: 343 [2021-06-05 20:37:57,398 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 20:37:57,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 953.9ms TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:37:57,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 20:37:57,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 213. [2021-06-05 20:37:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.009433962264151) internal successors, (426), 212 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 426 transitions. [2021-06-05 20:37:57,400 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 426 transitions. Word has length 21 [2021-06-05 20:37:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:57,400 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 426 transitions. [2021-06-05 20:37:57,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 426 transitions. [2021-06-05 20:37:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:57,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:57,400 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:57,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 20:37:57,601 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash 968001193, now seen corresponding path program 210 times [2021-06-05 20:37:57,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:57,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913537994] [2021-06-05 20:37:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:57,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:57,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913537994] [2021-06-05 20:37:57,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913537994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:57,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582715898] [2021-06-05 20:37:57,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:57,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:37:57,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:57,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:58,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582715898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:58,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:58,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:37:58,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817775413] [2021-06-05 20:37:58,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:37:58,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:58,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:37:58,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:37:58,198 INFO L87 Difference]: Start difference. First operand 213 states and 426 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:59,346 INFO L93 Difference]: Finished difference Result 364 states and 718 transitions. [2021-06-05 20:37:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:37:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:37:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:59,346 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:37:59,346 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:37:59,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1054.4ms TimeCoverageRelationStatistics Valid=480, Invalid=2826, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:37:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:37:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 218. [2021-06-05 20:37:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.032258064516129) internal successors, (441), 217 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 441 transitions. [2021-06-05 20:37:59,349 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 441 transitions. Word has length 21 [2021-06-05 20:37:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:59,349 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 441 transitions. [2021-06-05 20:37:59,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 441 transitions. [2021-06-05 20:37:59,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:37:59,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:59,349 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:59,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 20:37:59,550 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash 960678373, now seen corresponding path program 211 times [2021-06-05 20:37:59,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:59,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936699391] [2021-06-05 20:37:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:59,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:59,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936699391] [2021-06-05 20:37:59,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936699391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:59,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145126197] [2021-06-05 20:37:59,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:59,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:37:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:00,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145126197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:00,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:00,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:00,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522323053] [2021-06-05 20:38:00,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:00,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:00,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:00,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:00,145 INFO L87 Difference]: Start difference. First operand 218 states and 441 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:01,213 INFO L93 Difference]: Finished difference Result 378 states and 743 transitions. [2021-06-05 20:38:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:38:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:01,214 INFO L225 Difference]: With dead ends: 378 [2021-06-05 20:38:01,214 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:38:01,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1065.8ms TimeCoverageRelationStatistics Valid=520, Invalid=2902, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:38:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:38:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 216. [2021-06-05 20:38:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0232558139534884) internal successors, (435), 215 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 435 transitions. [2021-06-05 20:38:01,217 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 435 transitions. Word has length 21 [2021-06-05 20:38:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:01,217 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 435 transitions. [2021-06-05 20:38:01,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 435 transitions. [2021-06-05 20:38:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:01,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:01,217 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:01,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:01,429 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:01,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1222999579, now seen corresponding path program 212 times [2021-06-05 20:38:01,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:01,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335741735] [2021-06-05 20:38:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:01,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335741735] [2021-06-05 20:38:01,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335741735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101082592] [2021-06-05 20:38:01,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:01,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:38:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:01,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:02,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101082592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:02,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:02,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:02,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373373663] [2021-06-05 20:38:02,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:02,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:02,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:02,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:02,031 INFO L87 Difference]: Start difference. First operand 216 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:03,106 INFO L93 Difference]: Finished difference Result 369 states and 730 transitions. [2021-06-05 20:38:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:38:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:03,107 INFO L225 Difference]: With dead ends: 369 [2021-06-05 20:38:03,107 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 20:38:03,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1068.4ms TimeCoverageRelationStatistics Valid=503, Invalid=2919, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:38:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 20:38:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 214. [2021-06-05 20:38:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0093896713615025) internal successors, (428), 213 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 428 transitions. [2021-06-05 20:38:03,109 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 428 transitions. Word has length 21 [2021-06-05 20:38:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:03,110 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 428 transitions. [2021-06-05 20:38:03,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 428 transitions. [2021-06-05 20:38:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:03,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:03,110 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:03,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:03,310 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash 50051003, now seen corresponding path program 213 times [2021-06-05 20:38:03,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:03,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314609792] [2021-06-05 20:38:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:03,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314609792] [2021-06-05 20:38:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314609792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494088330] [2021-06-05 20:38:03,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:03,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:38:03,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:03,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:03,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:03,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494088330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:03,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:03,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:03,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545215352] [2021-06-05 20:38:03,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:03,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:03,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:03,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:03,912 INFO L87 Difference]: Start difference. First operand 214 states and 428 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:04,953 INFO L93 Difference]: Finished difference Result 360 states and 710 transitions. [2021-06-05 20:38:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:38:04,953 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:04,954 INFO L225 Difference]: With dead ends: 360 [2021-06-05 20:38:04,954 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 20:38:04,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1110.7ms TimeCoverageRelationStatistics Valid=504, Invalid=2918, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:38:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 20:38:04,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 220. [2021-06-05 20:38:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0319634703196345) internal successors, (445), 219 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 445 transitions. [2021-06-05 20:38:04,956 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 445 transitions. Word has length 21 [2021-06-05 20:38:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:04,956 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 445 transitions. [2021-06-05 20:38:04,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 445 transitions. [2021-06-05 20:38:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:04,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:04,957 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:05,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:05,161 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash 42728183, now seen corresponding path program 214 times [2021-06-05 20:38:05,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:05,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688973601] [2021-06-05 20:38:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:05,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:05,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688973601] [2021-06-05 20:38:05,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688973601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:05,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135972676] [2021-06-05 20:38:05,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:05,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:38:05,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:05,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:05,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:05,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135972676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:05,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:05,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:05,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354918849] [2021-06-05 20:38:05,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:05,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:05,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:05,766 INFO L87 Difference]: Start difference. First operand 220 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:06,923 INFO L93 Difference]: Finished difference Result 374 states and 735 transitions. [2021-06-05 20:38:06,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:06,923 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:06,924 INFO L225 Difference]: With dead ends: 374 [2021-06-05 20:38:06,924 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 20:38:06,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1114.8ms TimeCoverageRelationStatistics Valid=535, Invalid=3005, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:06,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 20:38:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 216. [2021-06-05 20:38:06,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0232558139534884) internal successors, (435), 215 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 435 transitions. [2021-06-05 20:38:06,926 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 435 transitions. Word has length 21 [2021-06-05 20:38:06,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:06,927 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 435 transitions. [2021-06-05 20:38:06,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 435 transitions. [2021-06-05 20:38:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:06,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:06,927 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:07,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:07,128 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2140949769, now seen corresponding path program 215 times [2021-06-05 20:38:07,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:07,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679477124] [2021-06-05 20:38:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:07,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679477124] [2021-06-05 20:38:07,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679477124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853594161] [2021-06-05 20:38:07,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:07,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:38:07,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:07,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:07,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853594161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:07,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:07,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:07,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899637445] [2021-06-05 20:38:07,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:07,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:07,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:07,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:07,750 INFO L87 Difference]: Start difference. First operand 216 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:08,780 INFO L93 Difference]: Finished difference Result 363 states and 718 transitions. [2021-06-05 20:38:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:38:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:08,780 INFO L225 Difference]: With dead ends: 363 [2021-06-05 20:38:08,781 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 20:38:08,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1031.3ms TimeCoverageRelationStatistics Valid=483, Invalid=2709, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:38:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 20:38:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 210. [2021-06-05 20:38:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0095693779904304) internal successors, (420), 209 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 420 transitions. [2021-06-05 20:38:08,783 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 420 transitions. Word has length 21 [2021-06-05 20:38:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:08,783 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 420 transitions. [2021-06-05 20:38:08,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 420 transitions. [2021-06-05 20:38:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:08,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:08,783 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:08,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 20:38:08,984 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:08,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1352974761, now seen corresponding path program 216 times [2021-06-05 20:38:08,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:08,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523853537] [2021-06-05 20:38:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:09,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:09,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523853537] [2021-06-05 20:38:09,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523853537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:09,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604137755] [2021-06-05 20:38:09,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:09,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:38:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:09,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:09,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604137755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:09,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:09,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:09,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046099309] [2021-06-05 20:38:09,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:09,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:09,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:09,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:09,639 INFO L87 Difference]: Start difference. First operand 210 states and 420 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:10,229 INFO L93 Difference]: Finished difference Result 314 states and 618 transitions. [2021-06-05 20:38:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:38:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:10,229 INFO L225 Difference]: With dead ends: 314 [2021-06-05 20:38:10,229 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 20:38:10,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 855.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:38:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 20:38:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 214. [2021-06-05 20:38:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0140845070422535) internal successors, (429), 213 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 429 transitions. [2021-06-05 20:38:10,232 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 429 transitions. Word has length 21 [2021-06-05 20:38:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:10,232 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 429 transitions. [2021-06-05 20:38:10,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 429 transitions. [2021-06-05 20:38:10,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:10,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:10,232 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:10,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 20:38:10,433 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash 241011109, now seen corresponding path program 217 times [2021-06-05 20:38:10,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:10,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123938615] [2021-06-05 20:38:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:10,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:10,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123938615] [2021-06-05 20:38:10,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123938615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:10,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281744140] [2021-06-05 20:38:10,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:10,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:11,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281744140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:11,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:11,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:11,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961913863] [2021-06-05 20:38:11,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:11,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:11,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:11,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:11,026 INFO L87 Difference]: Start difference. First operand 214 states and 429 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:12,242 INFO L93 Difference]: Finished difference Result 372 states and 731 transitions. [2021-06-05 20:38:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:12,242 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:12,243 INFO L225 Difference]: With dead ends: 372 [2021-06-05 20:38:12,243 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 20:38:12,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1140.7ms TimeCoverageRelationStatistics Valid=515, Invalid=3025, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 20:38:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 220. [2021-06-05 20:38:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.036529680365297) internal successors, (446), 219 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 446 transitions. [2021-06-05 20:38:12,245 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 446 transitions. Word has length 21 [2021-06-05 20:38:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:12,246 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 446 transitions. [2021-06-05 20:38:12,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 446 transitions. [2021-06-05 20:38:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:12,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:12,246 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:12,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 20:38:12,446 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash 233688289, now seen corresponding path program 218 times [2021-06-05 20:38:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:12,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258684326] [2021-06-05 20:38:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:12,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:12,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258684326] [2021-06-05 20:38:12,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258684326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:12,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306117551] [2021-06-05 20:38:12,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:12,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:38:12,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:12,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:13,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306117551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:13,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:13,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:13,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087078117] [2021-06-05 20:38:13,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:13,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:13,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:13,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:13,036 INFO L87 Difference]: Start difference. First operand 220 states and 446 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:14,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:14,192 INFO L93 Difference]: Finished difference Result 386 states and 756 transitions. [2021-06-05 20:38:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:14,192 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:14,193 INFO L225 Difference]: With dead ends: 386 [2021-06-05 20:38:14,193 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 20:38:14,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1105.8ms TimeCoverageRelationStatistics Valid=534, Invalid=3006, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 20:38:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 216. [2021-06-05 20:38:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.027906976744186) internal successors, (436), 215 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 436 transitions. [2021-06-05 20:38:14,195 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 436 transitions. Word has length 21 [2021-06-05 20:38:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:14,195 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 436 transitions. [2021-06-05 20:38:14,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 436 transitions. [2021-06-05 20:38:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:14,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:14,196 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:14,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 20:38:14,396 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1949989663, now seen corresponding path program 219 times [2021-06-05 20:38:14,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:14,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086291454] [2021-06-05 20:38:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:14,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086291454] [2021-06-05 20:38:14,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086291454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118116053] [2021-06-05 20:38:14,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:14,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:38:14,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:14,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:14,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118116053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:14,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:14,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:14,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766065143] [2021-06-05 20:38:14,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:14,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:14,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:14,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:14,987 INFO L87 Difference]: Start difference. First operand 216 states and 436 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:16,142 INFO L93 Difference]: Finished difference Result 375 states and 742 transitions. [2021-06-05 20:38:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:16,143 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:38:16,143 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:38:16,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1107.9ms TimeCoverageRelationStatistics Valid=542, Invalid=2998, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:38:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 213. [2021-06-05 20:38:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.009433962264151) internal successors, (426), 212 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 426 transitions. [2021-06-05 20:38:16,145 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 426 transitions. Word has length 21 [2021-06-05 20:38:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:16,145 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 426 transitions. [2021-06-05 20:38:16,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 426 transitions. [2021-06-05 20:38:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:16,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:16,146 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:16,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 20:38:16,346 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:16,346 INFO L82 PathProgramCache]: Analyzing trace with hash 623731497, now seen corresponding path program 220 times [2021-06-05 20:38:16,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:16,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471876702] [2021-06-05 20:38:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:16,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:16,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471876702] [2021-06-05 20:38:16,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471876702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:16,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665842405] [2021-06-05 20:38:16,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:16,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:38:16,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:16,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:16,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:16,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665842405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:16,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:16,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:16,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327394927] [2021-06-05 20:38:16,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:16,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:16,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:16,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:16,939 INFO L87 Difference]: Start difference. First operand 213 states and 426 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:18,114 INFO L93 Difference]: Finished difference Result 366 states and 722 transitions. [2021-06-05 20:38:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:38:18,114 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:18,115 INFO L225 Difference]: With dead ends: 366 [2021-06-05 20:38:18,115 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 20:38:18,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1077.7ms TimeCoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:38:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 20:38:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 218. [2021-06-05 20:38:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.032258064516129) internal successors, (441), 217 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 441 transitions. [2021-06-05 20:38:18,117 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 441 transitions. Word has length 21 [2021-06-05 20:38:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:18,117 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 441 transitions. [2021-06-05 20:38:18,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 441 transitions. [2021-06-05 20:38:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:18,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:18,118 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:18,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 20:38:18,318 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:18,318 INFO L82 PathProgramCache]: Analyzing trace with hash 616408677, now seen corresponding path program 221 times [2021-06-05 20:38:18,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:18,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108619023] [2021-06-05 20:38:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:18,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:18,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108619023] [2021-06-05 20:38:18,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108619023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:18,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415241013] [2021-06-05 20:38:18,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:18,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:38:18,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:18,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:18,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:18,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415241013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:18,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:18,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35982133] [2021-06-05 20:38:18,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:18,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:18,944 INFO L87 Difference]: Start difference. First operand 218 states and 441 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:20,007 INFO L93 Difference]: Finished difference Result 380 states and 747 transitions. [2021-06-05 20:38:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:38:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:20,007 INFO L225 Difference]: With dead ends: 380 [2021-06-05 20:38:20,007 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 20:38:20,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1096.9ms TimeCoverageRelationStatistics Valid=524, Invalid=2898, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:38:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 20:38:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 216. [2021-06-05 20:38:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0232558139534884) internal successors, (435), 215 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 435 transitions. [2021-06-05 20:38:20,011 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 435 transitions. Word has length 21 [2021-06-05 20:38:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:20,011 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 435 transitions. [2021-06-05 20:38:20,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 435 transitions. [2021-06-05 20:38:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:20,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:20,012 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:20,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:20,213 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1567269275, now seen corresponding path program 222 times [2021-06-05 20:38:20,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:20,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812944204] [2021-06-05 20:38:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:20,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:20,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812944204] [2021-06-05 20:38:20,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812944204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:20,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142123285] [2021-06-05 20:38:20,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:20,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:38:20,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:20,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:20,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:20,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142123285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:20,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:20,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:20,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705096237] [2021-06-05 20:38:20,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:20,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:20,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:20,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:20,803 INFO L87 Difference]: Start difference. First operand 216 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:21,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:21,907 INFO L93 Difference]: Finished difference Result 378 states and 748 transitions. [2021-06-05 20:38:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:38:21,907 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:21,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:21,907 INFO L225 Difference]: With dead ends: 378 [2021-06-05 20:38:21,907 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:38:21,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1125.6ms TimeCoverageRelationStatistics Valid=552, Invalid=3108, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:38:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:38:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 214. [2021-06-05 20:38:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0093896713615025) internal successors, (428), 213 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 428 transitions. [2021-06-05 20:38:21,910 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 428 transitions. Word has length 21 [2021-06-05 20:38:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:21,910 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 428 transitions. [2021-06-05 20:38:21,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 428 transitions. [2021-06-05 20:38:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:21,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:21,910 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:22,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:22,111 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:22,111 INFO L82 PathProgramCache]: Analyzing trace with hash -294218693, now seen corresponding path program 223 times [2021-06-05 20:38:22,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:22,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834703483] [2021-06-05 20:38:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:22,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:22,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834703483] [2021-06-05 20:38:22,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834703483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:22,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491255782] [2021-06-05 20:38:22,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:22,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:22,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:22,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491255782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:22,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:22,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:22,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643323359] [2021-06-05 20:38:22,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:22,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:22,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:22,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:22,743 INFO L87 Difference]: Start difference. First operand 214 states and 428 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:23,838 INFO L93 Difference]: Finished difference Result 363 states and 716 transitions. [2021-06-05 20:38:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:23,838 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:23,839 INFO L225 Difference]: With dead ends: 363 [2021-06-05 20:38:23,839 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 20:38:23,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1162.3ms TimeCoverageRelationStatistics Valid=515, Invalid=3025, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 20:38:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 220. [2021-06-05 20:38:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0319634703196345) internal successors, (445), 219 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 445 transitions. [2021-06-05 20:38:23,841 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 445 transitions. Word has length 21 [2021-06-05 20:38:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:23,841 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 445 transitions. [2021-06-05 20:38:23,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 445 transitions. [2021-06-05 20:38:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:23,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:23,842 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:24,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:24,042 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:24,042 INFO L82 PathProgramCache]: Analyzing trace with hash -301541513, now seen corresponding path program 224 times [2021-06-05 20:38:24,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:24,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473482116] [2021-06-05 20:38:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:24,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473482116] [2021-06-05 20:38:24,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473482116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293379222] [2021-06-05 20:38:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:24,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:38:24,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:24,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:24,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:24,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293379222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:24,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:24,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:24,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221429759] [2021-06-05 20:38:24,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:24,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:24,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:24,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:24,630 INFO L87 Difference]: Start difference. First operand 220 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:25,767 INFO L93 Difference]: Finished difference Result 377 states and 741 transitions. [2021-06-05 20:38:25,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:25,767 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:25,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:25,768 INFO L225 Difference]: With dead ends: 377 [2021-06-05 20:38:25,768 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 20:38:25,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1103.1ms TimeCoverageRelationStatistics Valid=533, Invalid=3007, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 20:38:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 216. [2021-06-05 20:38:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0232558139534884) internal successors, (435), 215 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 435 transitions. [2021-06-05 20:38:25,774 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 435 transitions. Word has length 21 [2021-06-05 20:38:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:25,774 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 435 transitions. [2021-06-05 20:38:25,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 435 transitions. [2021-06-05 20:38:25,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:25,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:25,774 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:25,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:25,975 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:25,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1809747831, now seen corresponding path program 225 times [2021-06-05 20:38:25,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:25,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909526519] [2021-06-05 20:38:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:26,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:26,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909526519] [2021-06-05 20:38:26,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909526519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:26,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302916465] [2021-06-05 20:38:26,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:26,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:38:26,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:26,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:26,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:26,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302916465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:26,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:26,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:26,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050328322] [2021-06-05 20:38:26,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:26,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:26,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:26,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:26,571 INFO L87 Difference]: Start difference. First operand 216 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:27,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:27,761 INFO L93 Difference]: Finished difference Result 375 states and 742 transitions. [2021-06-05 20:38:27,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:27,761 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:27,762 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:38:27,762 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:38:27,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1104.8ms TimeCoverageRelationStatistics Valid=545, Invalid=2995, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:38:27,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 212. [2021-06-05 20:38:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.009478672985782) internal successors, (424), 211 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 424 transitions. [2021-06-05 20:38:27,765 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 424 transitions. Word has length 21 [2021-06-05 20:38:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:27,765 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 424 transitions. [2021-06-05 20:38:27,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 424 transitions. [2021-06-05 20:38:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:27,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:27,765 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:27,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:27,973 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:27,973 INFO L82 PathProgramCache]: Analyzing trace with hash -375832155, now seen corresponding path program 226 times [2021-06-05 20:38:27,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:27,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489660266] [2021-06-05 20:38:27,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:28,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:28,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489660266] [2021-06-05 20:38:28,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489660266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:28,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162828166] [2021-06-05 20:38:28,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:28,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:38:28,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:28,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:28,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:28,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162828166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:28,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:28,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:28,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341953618] [2021-06-05 20:38:28,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:28,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:28,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:28,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:28,565 INFO L87 Difference]: Start difference. First operand 212 states and 424 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:29,708 INFO L93 Difference]: Finished difference Result 366 states and 722 transitions. [2021-06-05 20:38:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:38:29,709 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:29,709 INFO L225 Difference]: With dead ends: 366 [2021-06-05 20:38:29,709 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 20:38:29,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1064.6ms TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:38:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 20:38:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 218. [2021-06-05 20:38:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.0368663594470044) internal successors, (442), 217 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 442 transitions. [2021-06-05 20:38:29,712 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 442 transitions. Word has length 21 [2021-06-05 20:38:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:29,713 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 442 transitions. [2021-06-05 20:38:29,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 442 transitions. [2021-06-05 20:38:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:29,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:29,713 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:29,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 20:38:29,917 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:29,917 INFO L82 PathProgramCache]: Analyzing trace with hash -383154975, now seen corresponding path program 227 times [2021-06-05 20:38:29,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:29,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656996756] [2021-06-05 20:38:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:30,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:30,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656996756] [2021-06-05 20:38:30,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656996756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:30,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523678638] [2021-06-05 20:38:30,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:30,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:38:30,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:30,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:30,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:30,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523678638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:30,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:30,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:30,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611718916] [2021-06-05 20:38:30,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:30,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:30,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:30,512 INFO L87 Difference]: Start difference. First operand 218 states and 442 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:31,636 INFO L93 Difference]: Finished difference Result 380 states and 747 transitions. [2021-06-05 20:38:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:38:31,637 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:31,637 INFO L225 Difference]: With dead ends: 380 [2021-06-05 20:38:31,637 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 20:38:31,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1081.8ms TimeCoverageRelationStatistics Valid=527, Invalid=2895, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:38:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 20:38:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 216. [2021-06-05 20:38:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.027906976744186) internal successors, (436), 215 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 436 transitions. [2021-06-05 20:38:31,640 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 436 transitions. Word has length 21 [2021-06-05 20:38:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:31,640 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 436 transitions. [2021-06-05 20:38:31,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 436 transitions. [2021-06-05 20:38:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:31,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:31,640 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:31,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 20:38:31,840 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1728134369, now seen corresponding path program 228 times [2021-06-05 20:38:31,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:31,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628866639] [2021-06-05 20:38:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:32,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:32,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628866639] [2021-06-05 20:38:32,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628866639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:32,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966364861] [2021-06-05 20:38:32,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:32,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:38:32,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:32,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:32,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:32,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966364861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:32,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:32,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:32,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840544069] [2021-06-05 20:38:32,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:32,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:32,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:32,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:32,457 INFO L87 Difference]: Start difference. First operand 216 states and 436 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:33,687 INFO L93 Difference]: Finished difference Result 399 states and 782 transitions. [2021-06-05 20:38:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:38:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:33,688 INFO L225 Difference]: With dead ends: 399 [2021-06-05 20:38:33,688 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 20:38:33,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1192.5ms TimeCoverageRelationStatistics Valid=584, Invalid=3198, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:38:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 20:38:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 214. [2021-06-05 20:38:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0140845070422535) internal successors, (429), 213 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 429 transitions. [2021-06-05 20:38:33,690 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 429 transitions. Word has length 21 [2021-06-05 20:38:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:33,690 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 429 transitions. [2021-06-05 20:38:33,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 429 transitions. [2021-06-05 20:38:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:33,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:33,691 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:33,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 20:38:33,891 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:33,891 INFO L82 PathProgramCache]: Analyzing trace with hash 138439905, now seen corresponding path program 229 times [2021-06-05 20:38:33,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:33,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680481378] [2021-06-05 20:38:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:34,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:34,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680481378] [2021-06-05 20:38:34,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680481378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:34,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962541196] [2021-06-05 20:38:34,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:34,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:34,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962541196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:34,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:34,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:34,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259226808] [2021-06-05 20:38:34,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:34,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:34,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:34,481 INFO L87 Difference]: Start difference. First operand 214 states and 429 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:35,324 INFO L93 Difference]: Finished difference Result 353 states and 693 transitions. [2021-06-05 20:38:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:38:35,325 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:35,325 INFO L225 Difference]: With dead ends: 353 [2021-06-05 20:38:35,325 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 20:38:35,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 973.2ms TimeCoverageRelationStatistics Valid=455, Invalid=2515, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:38:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 20:38:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 213. [2021-06-05 20:38:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.009433962264151) internal successors, (426), 212 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 426 transitions. [2021-06-05 20:38:35,328 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 426 transitions. Word has length 21 [2021-06-05 20:38:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:35,328 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 426 transitions. [2021-06-05 20:38:35,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 426 transitions. [2021-06-05 20:38:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:35,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:35,328 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:35,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 20:38:35,541 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:35,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1989398889, now seen corresponding path program 230 times [2021-06-05 20:38:35,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:35,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429243351] [2021-06-05 20:38:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:35,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429243351] [2021-06-05 20:38:35,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429243351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172867175] [2021-06-05 20:38:35,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:35,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:38:35,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:35,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:36,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172867175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:36,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:36,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:36,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677421704] [2021-06-05 20:38:36,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:36,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:36,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:36,135 INFO L87 Difference]: Start difference. First operand 213 states and 426 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:37,292 INFO L93 Difference]: Finished difference Result 366 states and 722 transitions. [2021-06-05 20:38:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:38:37,292 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:37,293 INFO L225 Difference]: With dead ends: 366 [2021-06-05 20:38:37,293 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 20:38:37,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1057.6ms TimeCoverageRelationStatistics Valid=482, Invalid=2824, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:38:37,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 20:38:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 218. [2021-06-05 20:38:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.032258064516129) internal successors, (441), 217 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 441 transitions. [2021-06-05 20:38:37,296 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 441 transitions. Word has length 21 [2021-06-05 20:38:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:37,296 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 441 transitions. [2021-06-05 20:38:37,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 441 transitions. [2021-06-05 20:38:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:37,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:37,297 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:37,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:37,505 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:37,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1996721709, now seen corresponding path program 231 times [2021-06-05 20:38:37,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:37,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824555971] [2021-06-05 20:38:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:37,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:37,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824555971] [2021-06-05 20:38:37,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824555971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:37,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272268354] [2021-06-05 20:38:37,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:37,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:38:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:37,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:38,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272268354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:38,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:38,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:38,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982272589] [2021-06-05 20:38:38,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:38,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:38,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:38,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:38,104 INFO L87 Difference]: Start difference. First operand 218 states and 441 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:39,176 INFO L93 Difference]: Finished difference Result 380 states and 747 transitions. [2021-06-05 20:38:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:38:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:39,177 INFO L225 Difference]: With dead ends: 380 [2021-06-05 20:38:39,177 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 20:38:39,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1069.5ms TimeCoverageRelationStatistics Valid=523, Invalid=2899, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:38:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 20:38:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 216. [2021-06-05 20:38:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0232558139534884) internal successors, (435), 215 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 435 transitions. [2021-06-05 20:38:39,180 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 435 transitions. Word has length 21 [2021-06-05 20:38:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:39,180 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 435 transitions. [2021-06-05 20:38:39,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 435 transitions. [2021-06-05 20:38:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:39,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:39,180 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:39,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:39,381 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash 114567635, now seen corresponding path program 232 times [2021-06-05 20:38:39,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:39,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774611898] [2021-06-05 20:38:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:39,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:39,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774611898] [2021-06-05 20:38:39,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774611898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:39,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082770609] [2021-06-05 20:38:39,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:39,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:38:39,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:39,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:39,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:39,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082770609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:39,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:39,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:39,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080412510] [2021-06-05 20:38:39,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:39,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:39,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:39,970 INFO L87 Difference]: Start difference. First operand 216 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:41,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:41,135 INFO L93 Difference]: Finished difference Result 375 states and 742 transitions. [2021-06-05 20:38:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:38:41,135 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:41,136 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:38:41,136 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:38:41,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1129.2ms TimeCoverageRelationStatistics Valid=558, Invalid=3102, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:38:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:38:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 214. [2021-06-05 20:38:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0093896713615025) internal successors, (428), 213 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 428 transitions. [2021-06-05 20:38:41,138 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 428 transitions. Word has length 21 [2021-06-05 20:38:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:41,138 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 428 transitions. [2021-06-05 20:38:41,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 428 transitions. [2021-06-05 20:38:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:41,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:41,139 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:41,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 20:38:41,339 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1387618217, now seen corresponding path program 233 times [2021-06-05 20:38:41,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:41,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780948997] [2021-06-05 20:38:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:41,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:41,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780948997] [2021-06-05 20:38:41,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780948997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:41,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293104209] [2021-06-05 20:38:41,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:41,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:38:41,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:41,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:41,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293104209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:41,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:41,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:41,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377931373] [2021-06-05 20:38:41,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:41,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:41,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:41,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:41,944 INFO L87 Difference]: Start difference. First operand 214 states and 428 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:43,082 INFO L93 Difference]: Finished difference Result 358 states and 706 transitions. [2021-06-05 20:38:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:38:43,082 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:43,082 INFO L225 Difference]: With dead ends: 358 [2021-06-05 20:38:43,082 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 20:38:43,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1101.4ms TimeCoverageRelationStatistics Valid=506, Invalid=2916, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:38:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 20:38:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 220. [2021-06-05 20:38:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0319634703196345) internal successors, (445), 219 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 445 transitions. [2021-06-05 20:38:43,085 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 445 transitions. Word has length 21 [2021-06-05 20:38:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:43,085 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 445 transitions. [2021-06-05 20:38:43,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 445 transitions. [2021-06-05 20:38:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:43,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:43,085 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:43,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:43,286 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1380295397, now seen corresponding path program 234 times [2021-06-05 20:38:43,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:43,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248274772] [2021-06-05 20:38:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:43,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:43,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248274772] [2021-06-05 20:38:43,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248274772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:43,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333931894] [2021-06-05 20:38:43,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:43,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:38:43,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:43,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:43,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:43,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333931894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:43,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:43,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:43,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765415151] [2021-06-05 20:38:43,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:43,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:43,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:43,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:43,895 INFO L87 Difference]: Start difference. First operand 220 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:44,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:44,896 INFO L93 Difference]: Finished difference Result 372 states and 731 transitions. [2021-06-05 20:38:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:44,897 INFO L225 Difference]: With dead ends: 372 [2021-06-05 20:38:44,897 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 20:38:44,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1115.6ms TimeCoverageRelationStatistics Valid=538, Invalid=3002, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 20:38:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 216. [2021-06-05 20:38:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0232558139534884) internal successors, (435), 215 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 435 transitions. [2021-06-05 20:38:44,899 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 435 transitions. Word has length 21 [2021-06-05 20:38:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:44,899 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 435 transitions. [2021-06-05 20:38:44,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 435 transitions. [2021-06-05 20:38:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:44,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:44,900 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:45,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:45,100 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:45,101 INFO L82 PathProgramCache]: Analyzing trace with hash -803382555, now seen corresponding path program 235 times [2021-06-05 20:38:45,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:45,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34651998] [2021-06-05 20:38:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:45,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:45,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34651998] [2021-06-05 20:38:45,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34651998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:45,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739563986] [2021-06-05 20:38:45,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:45,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:45,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739563986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:45,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:45,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:45,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065290209] [2021-06-05 20:38:45,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:45,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:45,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:45,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:45,684 INFO L87 Difference]: Start difference. First operand 216 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:46,675 INFO L93 Difference]: Finished difference Result 369 states and 730 transitions. [2021-06-05 20:38:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:46,676 INFO L225 Difference]: With dead ends: 369 [2021-06-05 20:38:46,676 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 20:38:46,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1092.9ms TimeCoverageRelationStatistics Valid=557, Invalid=2983, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 20:38:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 211. [2021-06-05 20:38:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.0095238095238095) internal successors, (422), 210 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 422 transitions. [2021-06-05 20:38:46,679 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 422 transitions. Word has length 21 [2021-06-05 20:38:46,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:46,679 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 422 transitions. [2021-06-05 20:38:46,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 422 transitions. [2021-06-05 20:38:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:46,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:46,679 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:46,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:46,893 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash -646341847, now seen corresponding path program 236 times [2021-06-05 20:38:46,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:46,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668967602] [2021-06-05 20:38:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:47,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:47,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668967602] [2021-06-05 20:38:47,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668967602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:47,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381120683] [2021-06-05 20:38:47,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:47,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:38:47,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:47,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:47,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381120683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:47,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:47,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:47,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653218152] [2021-06-05 20:38:47,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:47,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:47,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:47,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:47,478 INFO L87 Difference]: Start difference. First operand 211 states and 422 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:48,702 INFO L93 Difference]: Finished difference Result 394 states and 778 transitions. [2021-06-05 20:38:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:38:48,702 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:48,703 INFO L225 Difference]: With dead ends: 394 [2021-06-05 20:38:48,703 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 20:38:48,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1118.1ms TimeCoverageRelationStatistics Valid=503, Invalid=3037, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:38:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 20:38:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 219. [2021-06-05 20:38:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.041284403669725) internal successors, (445), 218 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 445 transitions. [2021-06-05 20:38:48,705 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 445 transitions. Word has length 21 [2021-06-05 20:38:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:48,706 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 445 transitions. [2021-06-05 20:38:48,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 445 transitions. [2021-06-05 20:38:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:48,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:48,706 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:48,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-06-05 20:38:48,906 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash -653664667, now seen corresponding path program 237 times [2021-06-05 20:38:48,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:48,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162902663] [2021-06-05 20:38:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:49,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:49,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162902663] [2021-06-05 20:38:49,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162902663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:49,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086814707] [2021-06-05 20:38:49,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:49,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:38:49,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:49,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:49,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086814707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:49,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:49,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:49,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504822133] [2021-06-05 20:38:49,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:49,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:49,489 INFO L87 Difference]: Start difference. First operand 219 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:50,760 INFO L93 Difference]: Finished difference Result 407 states and 802 transitions. [2021-06-05 20:38:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:38:50,761 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:50,761 INFO L225 Difference]: With dead ends: 407 [2021-06-05 20:38:50,761 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 20:38:50,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1138.5ms TimeCoverageRelationStatistics Valid=543, Invalid=3117, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:38:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 20:38:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 217. [2021-06-05 20:38:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0324074074074074) internal successors, (439), 216 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 439 transitions. [2021-06-05 20:38:50,764 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 439 transitions. Word has length 21 [2021-06-05 20:38:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:50,764 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 439 transitions. [2021-06-05 20:38:50,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 439 transitions. [2021-06-05 20:38:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:50,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:50,764 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:50,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 20:38:50,965 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:50,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1457624677, now seen corresponding path program 238 times [2021-06-05 20:38:50,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:50,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168307665] [2021-06-05 20:38:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:51,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:51,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168307665] [2021-06-05 20:38:51,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168307665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:51,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106636853] [2021-06-05 20:38:51,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:51,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:38:51,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:51,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:51,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:51,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106636853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:51,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:51,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:51,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403967999] [2021-06-05 20:38:51,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:51,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:51,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:51,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:51,574 INFO L87 Difference]: Start difference. First operand 217 states and 439 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:52,919 INFO L93 Difference]: Finished difference Result 424 states and 831 transitions. [2021-06-05 20:38:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 20:38:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:52,920 INFO L225 Difference]: With dead ends: 424 [2021-06-05 20:38:52,920 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 20:38:52,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1296.4ms TimeCoverageRelationStatistics Valid=621, Invalid=3539, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 20:38:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 20:38:52,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 215. [2021-06-05 20:38:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.0186915887850465) internal successors, (432), 214 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 432 transitions. [2021-06-05 20:38:52,923 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 432 transitions. Word has length 21 [2021-06-05 20:38:52,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:52,923 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 432 transitions. [2021-06-05 20:38:52,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 432 transitions. [2021-06-05 20:38:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:52,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:52,923 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:53,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 20:38:53,124 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash -132069787, now seen corresponding path program 239 times [2021-06-05 20:38:53,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:53,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44476940] [2021-06-05 20:38:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:53,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:53,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44476940] [2021-06-05 20:38:53,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44476940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:53,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403521600] [2021-06-05 20:38:53,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:53,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:38:53,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:53,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:53,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:53,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403521600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:53,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:53,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:53,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271247598] [2021-06-05 20:38:53,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:53,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:53,701 INFO L87 Difference]: Start difference. First operand 215 states and 432 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:54,579 INFO L93 Difference]: Finished difference Result 359 states and 704 transitions. [2021-06-05 20:38:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:38:54,579 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:54,579 INFO L225 Difference]: With dead ends: 359 [2021-06-05 20:38:54,579 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 20:38:54,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1026.4ms TimeCoverageRelationStatistics Valid=475, Invalid=2717, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:38:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 20:38:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 214. [2021-06-05 20:38:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0140845070422535) internal successors, (429), 213 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 429 transitions. [2021-06-05 20:38:54,583 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 429 transitions. Word has length 21 [2021-06-05 20:38:54,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:54,583 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 429 transitions. [2021-06-05 20:38:54,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:54,583 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 429 transitions. [2021-06-05 20:38:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:54,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:54,583 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:54,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 20:38:54,784 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:54,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1272353623, now seen corresponding path program 240 times [2021-06-05 20:38:54,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:54,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974932055] [2021-06-05 20:38:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:54,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:54,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974932055] [2021-06-05 20:38:54,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974932055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:54,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715703914] [2021-06-05 20:38:54,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:54,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:38:54,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:54,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:55,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715703914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:55,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:55,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:55,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514237602] [2021-06-05 20:38:55,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:55,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:55,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:55,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:55,360 INFO L87 Difference]: Start difference. First operand 214 states and 429 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:56,395 INFO L93 Difference]: Finished difference Result 350 states and 688 transitions. [2021-06-05 20:38:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:38:56,395 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:56,396 INFO L225 Difference]: With dead ends: 350 [2021-06-05 20:38:56,396 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 20:38:56,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1071.9ms TimeCoverageRelationStatistics Valid=478, Invalid=2828, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:38:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 20:38:56,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 213. [2021-06-05 20:38:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.009433962264151) internal successors, (426), 212 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 426 transitions. [2021-06-05 20:38:56,398 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 426 transitions. Word has length 21 [2021-06-05 20:38:56,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:56,398 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 426 transitions. [2021-06-05 20:38:56,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 426 transitions. [2021-06-05 20:38:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:56,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:56,399 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:56,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:56,599 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1834961371, now seen corresponding path program 241 times [2021-06-05 20:38:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:56,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273628168] [2021-06-05 20:38:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:56,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:56,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273628168] [2021-06-05 20:38:56,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273628168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:56,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148250194] [2021-06-05 20:38:56,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:56,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:56,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:57,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148250194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:57,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:57,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:57,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874558390] [2021-06-05 20:38:57,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:57,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:57,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:57,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:57,187 INFO L87 Difference]: Start difference. First operand 213 states and 426 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:58,300 INFO L93 Difference]: Finished difference Result 383 states and 756 transitions. [2021-06-05 20:38:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:38:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:38:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:58,300 INFO L225 Difference]: With dead ends: 383 [2021-06-05 20:38:58,300 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 20:38:58,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1082.5ms TimeCoverageRelationStatistics Valid=482, Invalid=2940, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:38:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 20:38:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 218. [2021-06-05 20:38:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.032258064516129) internal successors, (441), 217 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 441 transitions. [2021-06-05 20:38:58,303 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 441 transitions. Word has length 21 [2021-06-05 20:38:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:58,303 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 441 transitions. [2021-06-05 20:38:58,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 441 transitions. [2021-06-05 20:38:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:38:58,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:58,303 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:58,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 20:38:58,504 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1842284191, now seen corresponding path program 242 times [2021-06-05 20:38:58,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:58,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314243166] [2021-06-05 20:38:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:58,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:58,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314243166] [2021-06-05 20:38:58,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314243166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:58,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784387351] [2021-06-05 20:38:58,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:58,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:38:58,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:58,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:38:58,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:59,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784387351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:59,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:59,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:38:59,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808150027] [2021-06-05 20:38:59,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:38:59,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:59,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:38:59,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:38:59,089 INFO L87 Difference]: Start difference. First operand 218 states and 441 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:00,167 INFO L93 Difference]: Finished difference Result 396 states and 780 transitions. [2021-06-05 20:39:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:39:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:00,168 INFO L225 Difference]: With dead ends: 396 [2021-06-05 20:39:00,168 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 20:39:00,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1094.2ms TimeCoverageRelationStatistics Valid=522, Invalid=3018, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:39:00,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 20:39:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 216. [2021-06-05 20:39:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0232558139534884) internal successors, (435), 215 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 435 transitions. [2021-06-05 20:39:00,171 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 435 transitions. Word has length 21 [2021-06-05 20:39:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:00,171 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 435 transitions. [2021-06-05 20:39:00,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 435 transitions. [2021-06-05 20:39:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:00,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:00,171 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:00,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:00,372 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:00,372 INFO L82 PathProgramCache]: Analyzing trace with hash 269005153, now seen corresponding path program 243 times [2021-06-05 20:39:00,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:00,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287131298] [2021-06-05 20:39:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:00,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:00,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287131298] [2021-06-05 20:39:00,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287131298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:00,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984770772] [2021-06-05 20:39:00,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:00,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:39:00,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:00,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:00,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:00,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984770772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:00,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:00,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:00,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465183645] [2021-06-05 20:39:00,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:00,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:00,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:00,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:00,951 INFO L87 Difference]: Start difference. First operand 216 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:02,190 INFO L93 Difference]: Finished difference Result 391 states and 775 transitions. [2021-06-05 20:39:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:39:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:02,191 INFO L225 Difference]: With dead ends: 391 [2021-06-05 20:39:02,191 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 20:39:02,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1208.8ms TimeCoverageRelationStatistics Valid=575, Invalid=3331, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:39:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 20:39:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 214. [2021-06-05 20:39:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0093896713615025) internal successors, (428), 213 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 428 transitions. [2021-06-05 20:39:02,193 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 428 transitions. Word has length 21 [2021-06-05 20:39:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:02,193 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 428 transitions. [2021-06-05 20:39:02,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 428 transitions. [2021-06-05 20:39:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:02,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:02,193 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:02,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 20:39:02,394 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:02,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:02,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1542055735, now seen corresponding path program 244 times [2021-06-05 20:39:02,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:02,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370147440] [2021-06-05 20:39:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:02,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:02,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370147440] [2021-06-05 20:39:02,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370147440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:02,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357962721] [2021-06-05 20:39:02,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:02,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:39:02,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:02,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:02,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:02,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357962721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:02,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:02,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:02,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787708345] [2021-06-05 20:39:02,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:02,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:02,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:02,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:02,982 INFO L87 Difference]: Start difference. First operand 214 states and 428 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:04,192 INFO L93 Difference]: Finished difference Result 372 states and 734 transitions. [2021-06-05 20:39:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:39:04,192 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:04,193 INFO L225 Difference]: With dead ends: 372 [2021-06-05 20:39:04,193 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 20:39:04,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1198.4ms TimeCoverageRelationStatistics Valid=506, Invalid=3034, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:39:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 20:39:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 220. [2021-06-05 20:39:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0319634703196345) internal successors, (445), 219 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 445 transitions. [2021-06-05 20:39:04,196 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 445 transitions. Word has length 21 [2021-06-05 20:39:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:04,196 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 445 transitions. [2021-06-05 20:39:04,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 445 transitions. [2021-06-05 20:39:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:04,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:04,197 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:04,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:04,401 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1534732915, now seen corresponding path program 245 times [2021-06-05 20:39:04,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:04,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080040409] [2021-06-05 20:39:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:04,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:04,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080040409] [2021-06-05 20:39:04,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080040409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:04,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849242021] [2021-06-05 20:39:04,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:04,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:39:04,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:04,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:04,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:04,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849242021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:04,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:04,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:04,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890859695] [2021-06-05 20:39:04,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:04,991 INFO L87 Difference]: Start difference. First operand 220 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:06,159 INFO L93 Difference]: Finished difference Result 384 states and 757 transitions. [2021-06-05 20:39:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:39:06,159 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:06,159 INFO L225 Difference]: With dead ends: 384 [2021-06-05 20:39:06,159 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 20:39:06,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1137.9ms TimeCoverageRelationStatistics Valid=537, Invalid=3123, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:39:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 20:39:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 216. [2021-06-05 20:39:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0232558139534884) internal successors, (435), 215 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 435 transitions. [2021-06-05 20:39:06,162 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 435 transitions. Word has length 21 [2021-06-05 20:39:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:06,162 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 435 transitions. [2021-06-05 20:39:06,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 435 transitions. [2021-06-05 20:39:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:06,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:06,162 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:06,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:06,363 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash -648945037, now seen corresponding path program 246 times [2021-06-05 20:39:06,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:06,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239881465] [2021-06-05 20:39:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:06,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:06,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239881465] [2021-06-05 20:39:06,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239881465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:06,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948263359] [2021-06-05 20:39:06,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:06,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:39:06,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:06,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:06,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:06,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948263359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:06,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:06,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:06,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322349878] [2021-06-05 20:39:06,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:06,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:06,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:06,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:06,947 INFO L87 Difference]: Start difference. First operand 216 states and 435 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:08,190 INFO L93 Difference]: Finished difference Result 377 states and 748 transitions. [2021-06-05 20:39:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:39:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:08,191 INFO L225 Difference]: With dead ends: 377 [2021-06-05 20:39:08,191 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 20:39:08,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1169.7ms TimeCoverageRelationStatistics Valid=576, Invalid=3206, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:39:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 20:39:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 209. [2021-06-05 20:39:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0096153846153846) internal successors, (418), 208 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 418 transitions. [2021-06-05 20:39:08,194 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 418 transitions. Word has length 21 [2021-06-05 20:39:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:08,194 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 418 transitions. [2021-06-05 20:39:08,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 418 transitions. [2021-06-05 20:39:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:08,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:08,194 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:08,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:08,395 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:08,395 INFO L82 PathProgramCache]: Analyzing trace with hash -344270183, now seen corresponding path program 247 times [2021-06-05 20:39:08,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:08,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7162982] [2021-06-05 20:39:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:08,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:08,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7162982] [2021-06-05 20:39:08,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7162982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:08,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125998819] [2021-06-05 20:39:08,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:08,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:08,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:08,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125998819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:08,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:08,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:08,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597739424] [2021-06-05 20:39:08,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:08,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:08,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:08,992 INFO L87 Difference]: Start difference. First operand 209 states and 418 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:09,635 INFO L93 Difference]: Finished difference Result 305 states and 599 transitions. [2021-06-05 20:39:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:39:09,635 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:09,636 INFO L225 Difference]: With dead ends: 305 [2021-06-05 20:39:09,636 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 20:39:09,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:39:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 20:39:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 207. [2021-06-05 20:39:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.0097087378640777) internal successors, (414), 206 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 414 transitions. [2021-06-05 20:39:09,638 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 414 transitions. Word has length 21 [2021-06-05 20:39:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:09,638 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 414 transitions. [2021-06-05 20:39:09,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 414 transitions. [2021-06-05 20:39:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:09,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:09,638 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:09,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:09,839 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:09,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:09,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1456233835, now seen corresponding path program 248 times [2021-06-05 20:39:09,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:09,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590745966] [2021-06-05 20:39:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:10,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:10,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590745966] [2021-06-05 20:39:10,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590745966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:10,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058970926] [2021-06-05 20:39:10,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:10,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:39:10,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:10,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:10,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058970926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:10,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:10,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:10,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185077261] [2021-06-05 20:39:10,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:10,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:10,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:10,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:10,435 INFO L87 Difference]: Start difference. First operand 207 states and 414 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:11,572 INFO L93 Difference]: Finished difference Result 363 states and 712 transitions. [2021-06-05 20:39:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:39:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:11,572 INFO L225 Difference]: With dead ends: 363 [2021-06-05 20:39:11,572 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 20:39:11,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1045.4ms TimeCoverageRelationStatistics Valid=452, Invalid=2740, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:39:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 20:39:11,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 213. [2021-06-05 20:39:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.0330188679245285) internal successors, (431), 212 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 431 transitions. [2021-06-05 20:39:11,575 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 431 transitions. Word has length 21 [2021-06-05 20:39:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:11,575 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 431 transitions. [2021-06-05 20:39:11,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 431 transitions. [2021-06-05 20:39:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:11,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:11,575 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:11,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 20:39:11,776 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:11,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1463556655, now seen corresponding path program 249 times [2021-06-05 20:39:11,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:11,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321327694] [2021-06-05 20:39:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:11,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:11,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321327694] [2021-06-05 20:39:11,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321327694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:11,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452270798] [2021-06-05 20:39:11,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:11,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:39:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:11,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:12,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452270798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:12,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:12,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:12,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983266025] [2021-06-05 20:39:12,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:12,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:12,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:12,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:12,365 INFO L87 Difference]: Start difference. First operand 213 states and 431 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:13,500 INFO L93 Difference]: Finished difference Result 377 states and 737 transitions. [2021-06-05 20:39:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:39:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:13,501 INFO L225 Difference]: With dead ends: 377 [2021-06-05 20:39:13,501 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 20:39:13,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1017.8ms TimeCoverageRelationStatistics Valid=462, Invalid=2730, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:39:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 20:39:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 209. [2021-06-05 20:39:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0240384615384617) internal successors, (421), 208 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 421 transitions. [2021-06-05 20:39:13,504 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 421 transitions. Word has length 21 [2021-06-05 20:39:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:13,505 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 421 transitions. [2021-06-05 20:39:13,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 421 transitions. [2021-06-05 20:39:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:13,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:13,505 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:13,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 20:39:13,721 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:13,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:13,721 INFO L82 PathProgramCache]: Analyzing trace with hash 647732689, now seen corresponding path program 250 times [2021-06-05 20:39:13,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:13,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223954084] [2021-06-05 20:39:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:13,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223954084] [2021-06-05 20:39:13,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223954084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454387471] [2021-06-05 20:39:13,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:13,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:39:13,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:13,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:14,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454387471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:14,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:14,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:14,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735872284] [2021-06-05 20:39:14,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:14,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:14,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:14,308 INFO L87 Difference]: Start difference. First operand 209 states and 421 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:15,411 INFO L93 Difference]: Finished difference Result 356 states and 703 transitions. [2021-06-05 20:39:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:39:15,412 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:15,412 INFO L225 Difference]: With dead ends: 356 [2021-06-05 20:39:15,412 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 20:39:15,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1030.6ms TimeCoverageRelationStatistics Valid=465, Invalid=2727, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:39:15,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 20:39:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 206. [2021-06-05 20:39:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.004878048780488) internal successors, (411), 205 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 411 transitions. [2021-06-05 20:39:15,415 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 411 transitions. Word has length 21 [2021-06-05 20:39:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:15,415 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 411 transitions. [2021-06-05 20:39:15,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 411 transitions. [2021-06-05 20:39:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:15,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:15,416 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:15,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 20:39:15,621 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1073513447, now seen corresponding path program 251 times [2021-06-05 20:39:15,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:15,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373231211] [2021-06-05 20:39:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:15,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:15,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373231211] [2021-06-05 20:39:15,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373231211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:15,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659809047] [2021-06-05 20:39:15,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:15,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:39:15,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:15,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:16,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659809047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:16,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:16,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:16,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146738939] [2021-06-05 20:39:16,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:16,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:16,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:16,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:16,214 INFO L87 Difference]: Start difference. First operand 206 states and 411 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:17,210 INFO L93 Difference]: Finished difference Result 357 states and 703 transitions. [2021-06-05 20:39:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:39:17,210 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:17,211 INFO L225 Difference]: With dead ends: 357 [2021-06-05 20:39:17,211 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 20:39:17,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 984.1ms TimeCoverageRelationStatistics Valid=431, Invalid=2649, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:39:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 20:39:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 211. [2021-06-05 20:39:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.0285714285714285) internal successors, (426), 210 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 426 transitions. [2021-06-05 20:39:17,213 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 426 transitions. Word has length 21 [2021-06-05 20:39:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:17,213 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 426 transitions. [2021-06-05 20:39:17,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 426 transitions. [2021-06-05 20:39:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:17,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:17,214 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:17,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 20:39:17,414 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:17,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:17,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1080836267, now seen corresponding path program 252 times [2021-06-05 20:39:17,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:17,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922923535] [2021-06-05 20:39:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:17,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:17,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922923535] [2021-06-05 20:39:17,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922923535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:17,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869635356] [2021-06-05 20:39:17,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:17,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:39:17,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:17,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:18,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869635356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:18,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:18,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:18,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154976437] [2021-06-05 20:39:18,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:18,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:18,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:18,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:18,003 INFO L87 Difference]: Start difference. First operand 211 states and 426 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:19,064 INFO L93 Difference]: Finished difference Result 371 states and 728 transitions. [2021-06-05 20:39:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:39:19,065 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:19,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:19,065 INFO L225 Difference]: With dead ends: 371 [2021-06-05 20:39:19,065 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 20:39:19,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1063.3ms TimeCoverageRelationStatistics Valid=450, Invalid=2630, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:39:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 20:39:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 209. [2021-06-05 20:39:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.019230769230769) internal successors, (420), 208 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 420 transitions. [2021-06-05 20:39:19,068 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 420 transitions. Word has length 21 [2021-06-05 20:39:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:19,068 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 420 transitions. [2021-06-05 20:39:19,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 420 transitions. [2021-06-05 20:39:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:19,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:19,068 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:19,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:19,269 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1030453077, now seen corresponding path program 253 times [2021-06-05 20:39:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:19,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786199532] [2021-06-05 20:39:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:19,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:19,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786199532] [2021-06-05 20:39:19,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786199532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:19,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393736323] [2021-06-05 20:39:19,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:19,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:19,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393736323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:19,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:19,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:19,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775264453] [2021-06-05 20:39:19,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:19,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:19,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:19,855 INFO L87 Difference]: Start difference. First operand 209 states and 420 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:21,023 INFO L93 Difference]: Finished difference Result 367 states and 725 transitions. [2021-06-05 20:39:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:39:21,023 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:21,023 INFO L225 Difference]: With dead ends: 367 [2021-06-05 20:39:21,023 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 20:39:21,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1093.6ms TimeCoverageRelationStatistics Valid=528, Invalid=3012, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:39:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 20:39:21,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 207. [2021-06-05 20:39:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.004854368932039) internal successors, (413), 206 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 413 transitions. [2021-06-05 20:39:21,026 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 413 transitions. Word has length 21 [2021-06-05 20:39:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:21,026 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 413 transitions. [2021-06-05 20:39:21,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 413 transitions. [2021-06-05 20:39:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:21,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:21,026 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:21,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 20:39:21,227 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:21,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1991463637, now seen corresponding path program 254 times [2021-06-05 20:39:21,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:21,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460143243] [2021-06-05 20:39:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:21,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:21,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460143243] [2021-06-05 20:39:21,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460143243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:21,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542491294] [2021-06-05 20:39:21,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:21,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:39:21,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:21,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:21,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:21,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542491294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:21,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:21,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:21,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123301297] [2021-06-05 20:39:21,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:21,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:21,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:21,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:21,818 INFO L87 Difference]: Start difference. First operand 207 states and 413 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:22,862 INFO L93 Difference]: Finished difference Result 353 states and 695 transitions. [2021-06-05 20:39:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:39:22,862 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:22,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:22,863 INFO L225 Difference]: With dead ends: 353 [2021-06-05 20:39:22,863 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 20:39:22,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1029.4ms TimeCoverageRelationStatistics Valid=454, Invalid=2738, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:39:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 20:39:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 213. [2021-06-05 20:39:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.0283018867924527) internal successors, (430), 212 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 430 transitions. [2021-06-05 20:39:22,865 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 430 transitions. Word has length 21 [2021-06-05 20:39:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:22,865 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 430 transitions. [2021-06-05 20:39:22,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 430 transitions. [2021-06-05 20:39:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:22,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:22,866 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:23,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:23,066 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:23,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1998786457, now seen corresponding path program 255 times [2021-06-05 20:39:23,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:23,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691766098] [2021-06-05 20:39:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:23,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:23,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691766098] [2021-06-05 20:39:23,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691766098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:23,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587702839] [2021-06-05 20:39:23,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:23,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:39:23,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:23,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:23,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587702839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:23,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:23,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:23,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967398456] [2021-06-05 20:39:23,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:23,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:23,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:23,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:23,653 INFO L87 Difference]: Start difference. First operand 213 states and 430 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:24,642 INFO L93 Difference]: Finished difference Result 367 states and 720 transitions. [2021-06-05 20:39:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:39:24,642 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:24,642 INFO L225 Difference]: With dead ends: 367 [2021-06-05 20:39:24,642 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 20:39:24,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1008.3ms TimeCoverageRelationStatistics Valid=463, Invalid=2729, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:39:24,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 20:39:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 209. [2021-06-05 20:39:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.019230769230769) internal successors, (420), 208 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 420 transitions. [2021-06-05 20:39:24,645 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 420 transitions. Word has length 21 [2021-06-05 20:39:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:24,645 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 420 transitions. [2021-06-05 20:39:24,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 420 transitions. [2021-06-05 20:39:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:24,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:24,646 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:24,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 20:39:24,846 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:24,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:24,846 INFO L82 PathProgramCache]: Analyzing trace with hash 112502887, now seen corresponding path program 256 times [2021-06-05 20:39:24,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:24,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892391044] [2021-06-05 20:39:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:25,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:25,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892391044] [2021-06-05 20:39:25,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892391044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:25,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967949487] [2021-06-05 20:39:25,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:25,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:39:25,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:25,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:25,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967949487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:25,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:25,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:25,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629486812] [2021-06-05 20:39:25,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:25,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:25,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:25,471 INFO L87 Difference]: Start difference. First operand 209 states and 420 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:26,582 INFO L93 Difference]: Finished difference Result 358 states and 707 transitions. [2021-06-05 20:39:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:39:26,583 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:26,583 INFO L225 Difference]: With dead ends: 358 [2021-06-05 20:39:26,583 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 20:39:26,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1073.1ms TimeCoverageRelationStatistics Valid=502, Invalid=2804, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:39:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 20:39:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 205. [2021-06-05 20:39:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.0049019607843137) internal successors, (409), 204 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 409 transitions. [2021-06-05 20:39:26,586 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 409 transitions. Word has length 21 [2021-06-05 20:39:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:26,586 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 409 transitions. [2021-06-05 20:39:26,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 409 transitions. [2021-06-05 20:39:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:26,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:26,586 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:26,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-06-05 20:39:26,786 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:26,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:26,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2073077099, now seen corresponding path program 257 times [2021-06-05 20:39:26,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:26,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054965236] [2021-06-05 20:39:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:26,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:26,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054965236] [2021-06-05 20:39:26,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054965236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:26,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489539178] [2021-06-05 20:39:26,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:26,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:39:26,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:26,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:27,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489539178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:27,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:27,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:27,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785664638] [2021-06-05 20:39:27,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:27,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:27,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:27,382 INFO L87 Difference]: Start difference. First operand 205 states and 409 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:28,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:28,323 INFO L93 Difference]: Finished difference Result 356 states and 701 transitions. [2021-06-05 20:39:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:39:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:28,324 INFO L225 Difference]: With dead ends: 356 [2021-06-05 20:39:28,324 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 20:39:28,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 952.4ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:39:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 20:39:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 211. [2021-06-05 20:39:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.033333333333333) internal successors, (427), 210 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 427 transitions. [2021-06-05 20:39:28,326 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 427 transitions. Word has length 21 [2021-06-05 20:39:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:28,326 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 427 transitions. [2021-06-05 20:39:28,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 427 transitions. [2021-06-05 20:39:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:28,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:28,327 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:28,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:28,527 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2080399919, now seen corresponding path program 258 times [2021-06-05 20:39:28,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:28,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827103995] [2021-06-05 20:39:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:28,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827103995] [2021-06-05 20:39:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827103995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199892496] [2021-06-05 20:39:28,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:28,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:39:28,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:28,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:28,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:29,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199892496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:29,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:29,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:29,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021762301] [2021-06-05 20:39:29,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:29,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:29,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:29,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:29,122 INFO L87 Difference]: Start difference. First operand 211 states and 427 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:30,068 INFO L93 Difference]: Finished difference Result 370 states and 726 transitions. [2021-06-05 20:39:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:39:30,068 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:30,068 INFO L225 Difference]: With dead ends: 370 [2021-06-05 20:39:30,068 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 20:39:30,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 965.1ms TimeCoverageRelationStatistics Valid=437, Invalid=2533, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:39:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 20:39:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 209. [2021-06-05 20:39:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0240384615384617) internal successors, (421), 208 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 421 transitions. [2021-06-05 20:39:30,071 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 421 transitions. Word has length 21 [2021-06-05 20:39:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:30,071 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 421 transitions. [2021-06-05 20:39:30,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 421 transitions. [2021-06-05 20:39:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:30,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:30,071 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:30,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 20:39:30,272 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:30,272 INFO L82 PathProgramCache]: Analyzing trace with hash 30889425, now seen corresponding path program 259 times [2021-06-05 20:39:30,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:30,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151814065] [2021-06-05 20:39:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:30,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:30,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151814065] [2021-06-05 20:39:30,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151814065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:30,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977147802] [2021-06-05 20:39:30,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:30,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:30,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:30,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977147802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:30,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:30,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:30,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667574103] [2021-06-05 20:39:30,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:30,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:30,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:30,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:30,867 INFO L87 Difference]: Start difference. First operand 209 states and 421 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:31,911 INFO L93 Difference]: Finished difference Result 375 states and 733 transitions. [2021-06-05 20:39:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:39:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:31,912 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:39:31,912 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:39:31,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1068.9ms TimeCoverageRelationStatistics Valid=504, Invalid=2802, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:39:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:39:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 207. [2021-06-05 20:39:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.0097087378640777) internal successors, (414), 206 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 414 transitions. [2021-06-05 20:39:31,914 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 414 transitions. Word has length 21 [2021-06-05 20:39:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:31,914 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 414 transitions. [2021-06-05 20:39:31,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 414 transitions. [2021-06-05 20:39:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:31,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:31,915 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:32,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:32,115 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:32,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1558805039, now seen corresponding path program 260 times [2021-06-05 20:39:32,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:32,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476463417] [2021-06-05 20:39:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:32,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:32,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476463417] [2021-06-05 20:39:32,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476463417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:32,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394889993] [2021-06-05 20:39:32,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:32,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:39:32,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:32,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:32,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:32,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394889993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:32,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:32,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:32,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414807888] [2021-06-05 20:39:32,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:32,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:32,703 INFO L87 Difference]: Start difference. First operand 207 states and 414 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:33,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:33,492 INFO L93 Difference]: Finished difference Result 329 states and 646 transitions. [2021-06-05 20:39:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:39:33,492 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:33,493 INFO L225 Difference]: With dead ends: 329 [2021-06-05 20:39:33,493 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 20:39:33,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 924.8ms TimeCoverageRelationStatistics Valid=414, Invalid=2342, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:39:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 20:39:33,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 206. [2021-06-05 20:39:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.004878048780488) internal successors, (411), 205 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 411 transitions. [2021-06-05 20:39:33,495 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 411 transitions. Word has length 21 [2021-06-05 20:39:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:33,495 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 411 transitions. [2021-06-05 20:39:33,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 411 transitions. [2021-06-05 20:39:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:33,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:33,495 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:33,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 20:39:33,696 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 608323463, now seen corresponding path program 261 times [2021-06-05 20:39:33,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:33,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397042309] [2021-06-05 20:39:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:33,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:33,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397042309] [2021-06-05 20:39:33,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397042309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:33,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323734929] [2021-06-05 20:39:33,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:33,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:39:33,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:33,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:34,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323734929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:34,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:34,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:34,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073772849] [2021-06-05 20:39:34,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:34,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:34,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:34,283 INFO L87 Difference]: Start difference. First operand 206 states and 411 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:35,363 INFO L93 Difference]: Finished difference Result 356 states and 701 transitions. [2021-06-05 20:39:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:39:35,363 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:35,364 INFO L225 Difference]: With dead ends: 356 [2021-06-05 20:39:35,364 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 20:39:35,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 959.0ms TimeCoverageRelationStatistics Valid=417, Invalid=2553, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:39:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 20:39:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 211. [2021-06-05 20:39:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.0285714285714285) internal successors, (426), 210 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 426 transitions. [2021-06-05 20:39:35,366 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 426 transitions. Word has length 21 [2021-06-05 20:39:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:35,366 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 426 transitions. [2021-06-05 20:39:35,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 426 transitions. [2021-06-05 20:39:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:35,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:35,367 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:35,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 20:39:35,567 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:35,567 INFO L82 PathProgramCache]: Analyzing trace with hash 601000643, now seen corresponding path program 262 times [2021-06-05 20:39:35,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:35,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562479727] [2021-06-05 20:39:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:35,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:35,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562479727] [2021-06-05 20:39:35,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562479727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:35,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824437335] [2021-06-05 20:39:35,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:35,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:39:35,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:35,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:35,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:36,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824437335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:36,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:36,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:36,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483300218] [2021-06-05 20:39:36,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:36,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:36,159 INFO L87 Difference]: Start difference. First operand 211 states and 426 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:37,048 INFO L93 Difference]: Finished difference Result 370 states and 726 transitions. [2021-06-05 20:39:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:39:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:37,048 INFO L225 Difference]: With dead ends: 370 [2021-06-05 20:39:37,048 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 20:39:37,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 991.2ms TimeCoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:39:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 20:39:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 209. [2021-06-05 20:39:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.019230769230769) internal successors, (420), 208 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 420 transitions. [2021-06-05 20:39:37,052 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 420 transitions. Word has length 21 [2021-06-05 20:39:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:37,052 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 420 transitions. [2021-06-05 20:39:37,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 420 transitions. [2021-06-05 20:39:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:37,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:37,052 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:37,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 20:39:37,267 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1582677309, now seen corresponding path program 263 times [2021-06-05 20:39:37,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:37,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535919958] [2021-06-05 20:39:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:37,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:37,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535919958] [2021-06-05 20:39:37,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535919958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:37,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546711251] [2021-06-05 20:39:37,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:37,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:39:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:37,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:37,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:37,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546711251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:37,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:37,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:37,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469670485] [2021-06-05 20:39:37,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:37,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:37,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:37,875 INFO L87 Difference]: Start difference. First operand 209 states and 420 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:38,995 INFO L93 Difference]: Finished difference Result 361 states and 713 transitions. [2021-06-05 20:39:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:39:38,995 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:38,996 INFO L225 Difference]: With dead ends: 361 [2021-06-05 20:39:38,996 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 20:39:38,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1085.8ms TimeCoverageRelationStatistics Valid=517, Invalid=2905, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:39:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 20:39:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 207. [2021-06-05 20:39:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.004854368932039) internal successors, (413), 206 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 413 transitions. [2021-06-05 20:39:38,998 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 413 transitions. Word has length 21 [2021-06-05 20:39:38,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:38,998 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 413 transitions. [2021-06-05 20:39:38,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:38,998 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 413 transitions. [2021-06-05 20:39:38,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:38,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:38,998 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:39,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 20:39:39,199 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:39,199 INFO L82 PathProgramCache]: Analyzing trace with hash -309626727, now seen corresponding path program 264 times [2021-06-05 20:39:39,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:39,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999250491] [2021-06-05 20:39:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:39,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:39,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999250491] [2021-06-05 20:39:39,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999250491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:39,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385976483] [2021-06-05 20:39:39,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:39,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:39:39,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:39,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:39,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:39,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385976483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:39,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:39,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:39,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139130640] [2021-06-05 20:39:39,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:39,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:39,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:39,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:39,790 INFO L87 Difference]: Start difference. First operand 207 states and 413 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:40,703 INFO L93 Difference]: Finished difference Result 348 states and 685 transitions. [2021-06-05 20:39:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:39:40,704 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:40,704 INFO L225 Difference]: With dead ends: 348 [2021-06-05 20:39:40,704 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 20:39:40,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 991.1ms TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:39:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 20:39:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 213. [2021-06-05 20:39:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.0283018867924527) internal successors, (430), 212 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 430 transitions. [2021-06-05 20:39:40,707 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 430 transitions. Word has length 21 [2021-06-05 20:39:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:40,707 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 430 transitions. [2021-06-05 20:39:40,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 430 transitions. [2021-06-05 20:39:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:40,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:40,708 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:40,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:40,913 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash -316949547, now seen corresponding path program 265 times [2021-06-05 20:39:40,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:40,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310387361] [2021-06-05 20:39:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:41,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:41,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310387361] [2021-06-05 20:39:41,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310387361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:41,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61367528] [2021-06-05 20:39:41,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:41,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:41,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:41,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61367528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:41,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:41,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:41,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889716481] [2021-06-05 20:39:41,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:41,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:41,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:41,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:41,502 INFO L87 Difference]: Start difference. First operand 213 states and 430 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:42,388 INFO L93 Difference]: Finished difference Result 362 states and 710 transitions. [2021-06-05 20:39:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:39:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:42,389 INFO L225 Difference]: With dead ends: 362 [2021-06-05 20:39:42,389 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 20:39:42,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 990.8ms TimeCoverageRelationStatistics Valid=454, Invalid=2626, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:39:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 20:39:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 209. [2021-06-05 20:39:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.019230769230769) internal successors, (420), 208 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 420 transitions. [2021-06-05 20:39:42,391 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 420 transitions. Word has length 21 [2021-06-05 20:39:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:42,391 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 420 transitions. [2021-06-05 20:39:42,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 420 transitions. [2021-06-05 20:39:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:42,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:42,392 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:42,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 20:39:42,592 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1794339797, now seen corresponding path program 266 times [2021-06-05 20:39:42,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:42,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640214983] [2021-06-05 20:39:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:42,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:42,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640214983] [2021-06-05 20:39:42,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640214983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:42,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254589592] [2021-06-05 20:39:42,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:42,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:39:42,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:42,785 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:43,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254589592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:43,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:43,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:43,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618170792] [2021-06-05 20:39:43,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:43,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:43,177 INFO L87 Difference]: Start difference. First operand 209 states and 420 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:44,164 INFO L93 Difference]: Finished difference Result 352 states and 695 transitions. [2021-06-05 20:39:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:39:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:44,165 INFO L225 Difference]: With dead ends: 352 [2021-06-05 20:39:44,165 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 20:39:44,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1029.8ms TimeCoverageRelationStatistics Valid=496, Invalid=2696, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:39:44,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 20:39:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 204. [2021-06-05 20:39:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0049261083743843) internal successors, (407), 203 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 407 transitions. [2021-06-05 20:39:44,168 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 407 transitions. Word has length 21 [2021-06-05 20:39:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:44,168 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 407 transitions. [2021-06-05 20:39:44,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 407 transitions. [2021-06-05 20:39:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:44,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:44,168 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:44,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:44,368 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:44,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:44,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1951380505, now seen corresponding path program 267 times [2021-06-05 20:39:44,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:44,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036755061] [2021-06-05 20:39:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:44,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:44,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036755061] [2021-06-05 20:39:44,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036755061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:44,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773038427] [2021-06-05 20:39:44,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:44,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:39:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:44,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:44,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:44,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773038427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:44,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:44,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:44,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704269208] [2021-06-05 20:39:44,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:44,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:44,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:44,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:44,999 INFO L87 Difference]: Start difference. First operand 204 states and 407 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:46,117 INFO L93 Difference]: Finished difference Result 377 states and 742 transitions. [2021-06-05 20:39:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:39:46,118 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:46,118 INFO L225 Difference]: With dead ends: 377 [2021-06-05 20:39:46,118 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 20:39:46,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1043.3ms TimeCoverageRelationStatistics Valid=422, Invalid=2658, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:39:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 20:39:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 210. [2021-06-05 20:39:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0334928229665072) internal successors, (425), 209 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 425 transitions. [2021-06-05 20:39:46,120 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 425 transitions. Word has length 21 [2021-06-05 20:39:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:46,121 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 425 transitions. [2021-06-05 20:39:46,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 425 transitions. [2021-06-05 20:39:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:46,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:46,121 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:46,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:46,337 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1944057685, now seen corresponding path program 268 times [2021-06-05 20:39:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:46,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503102124] [2021-06-05 20:39:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:46,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503102124] [2021-06-05 20:39:46,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503102124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597341276] [2021-06-05 20:39:46,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:46,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:39:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:46,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:46,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:46,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597341276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:46,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:46,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:46,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742900417] [2021-06-05 20:39:46,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:46,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:46,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:46,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:46,934 INFO L87 Difference]: Start difference. First operand 210 states and 425 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:47,939 INFO L93 Difference]: Finished difference Result 390 states and 766 transitions. [2021-06-05 20:39:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:39:47,940 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:47,940 INFO L225 Difference]: With dead ends: 390 [2021-06-05 20:39:47,940 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 20:39:47,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1038.0ms TimeCoverageRelationStatistics Valid=453, Invalid=2739, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:39:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 20:39:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 208. [2021-06-05 20:39:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.024154589371981) internal successors, (419), 207 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 419 transitions. [2021-06-05 20:39:47,942 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 419 transitions. Word has length 21 [2021-06-05 20:39:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:47,943 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 419 transitions. [2021-06-05 20:39:47,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 419 transitions. [2021-06-05 20:39:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:47,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:47,943 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:48,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:48,144 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash -239620267, now seen corresponding path program 269 times [2021-06-05 20:39:48,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:48,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38036943] [2021-06-05 20:39:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:48,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:48,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38036943] [2021-06-05 20:39:48,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38036943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:48,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708059057] [2021-06-05 20:39:48,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:48,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:39:48,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:48,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:48,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708059057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:48,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:48,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:48,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221187121] [2021-06-05 20:39:48,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:48,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:48,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:48,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:48,735 INFO L87 Difference]: Start difference. First operand 208 states and 419 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:49,870 INFO L93 Difference]: Finished difference Result 397 states and 775 transitions. [2021-06-05 20:39:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:39:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:49,871 INFO L225 Difference]: With dead ends: 397 [2021-06-05 20:39:49,871 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 20:39:49,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1135.4ms TimeCoverageRelationStatistics Valid=519, Invalid=3021, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:39:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 20:39:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 206. [2021-06-05 20:39:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.0097560975609756) internal successors, (412), 205 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 412 transitions. [2021-06-05 20:39:49,874 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 412 transitions. Word has length 21 [2021-06-05 20:39:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:49,874 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 412 transitions. [2021-06-05 20:39:49,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 412 transitions. [2021-06-05 20:39:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:49,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:49,875 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:50,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:50,081 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1829314731, now seen corresponding path program 270 times [2021-06-05 20:39:50,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:50,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810867089] [2021-06-05 20:39:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:50,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810867089] [2021-06-05 20:39:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810867089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788497682] [2021-06-05 20:39:50,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:50,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:39:50,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:50,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:50,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:50,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788497682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:50,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:50,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:50,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12522615] [2021-06-05 20:39:50,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:50,665 INFO L87 Difference]: Start difference. First operand 206 states and 412 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:51,628 INFO L93 Difference]: Finished difference Result 342 states and 668 transitions. [2021-06-05 20:39:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:39:51,628 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:51,629 INFO L225 Difference]: With dead ends: 342 [2021-06-05 20:39:51,629 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 20:39:51,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=434, Invalid=2536, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:39:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 20:39:51,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 205. [2021-06-05 20:39:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.0049019607843137) internal successors, (409), 204 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 409 transitions. [2021-06-05 20:39:51,631 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 409 transitions. Word has length 21 [2021-06-05 20:39:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:51,631 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 409 transitions. [2021-06-05 20:39:51,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 409 transitions. [2021-06-05 20:39:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:51,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:51,631 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:51,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 20:39:51,832 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:51,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1325368729, now seen corresponding path program 271 times [2021-06-05 20:39:51,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:51,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307833923] [2021-06-05 20:39:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:52,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:52,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307833923] [2021-06-05 20:39:52,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307833923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:52,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664358555] [2021-06-05 20:39:52,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:52,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:52,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:52,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664358555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:52,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:52,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:52,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848903747] [2021-06-05 20:39:52,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:52,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:52,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:52,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:52,412 INFO L87 Difference]: Start difference. First operand 205 states and 409 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:53,442 INFO L93 Difference]: Finished difference Result 335 states and 656 transitions. [2021-06-05 20:39:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:39:53,442 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:53,443 INFO L225 Difference]: With dead ends: 335 [2021-06-05 20:39:53,443 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 20:39:53,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1055.5ms TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:39:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 20:39:53,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 204. [2021-06-05 20:39:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0) internal successors, (406), 203 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 406 transitions. [2021-06-05 20:39:53,445 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 406 transitions. Word has length 21 [2021-06-05 20:39:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:53,445 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 406 transitions. [2021-06-05 20:39:53,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 406 transitions. [2021-06-05 20:39:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:53,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:53,446 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:53,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 20:39:53,646 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 762760981, now seen corresponding path program 272 times [2021-06-05 20:39:53,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:53,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985332651] [2021-06-05 20:39:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:53,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:53,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985332651] [2021-06-05 20:39:53,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985332651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:53,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51073632] [2021-06-05 20:39:53,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:53,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:39:53,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:53,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:53,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:54,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51073632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:54,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:54,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:54,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131505406] [2021-06-05 20:39:54,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:54,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:54,239 INFO L87 Difference]: Start difference. First operand 204 states and 406 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:55,322 INFO L93 Difference]: Finished difference Result 370 states and 728 transitions. [2021-06-05 20:39:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:39:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:55,323 INFO L225 Difference]: With dead ends: 370 [2021-06-05 20:39:55,323 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 20:39:55,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 992.7ms TimeCoverageRelationStatistics Valid=417, Invalid=2663, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:39:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 20:39:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 209. [2021-06-05 20:39:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0240384615384617) internal successors, (421), 208 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 421 transitions. [2021-06-05 20:39:55,325 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 421 transitions. Word has length 21 [2021-06-05 20:39:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:55,325 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 421 transitions. [2021-06-05 20:39:55,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 421 transitions. [2021-06-05 20:39:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:55,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:55,326 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:55,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 20:39:55,548 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:55,549 INFO L82 PathProgramCache]: Analyzing trace with hash 755438161, now seen corresponding path program 273 times [2021-06-05 20:39:55,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:55,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936583412] [2021-06-05 20:39:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:55,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:55,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936583412] [2021-06-05 20:39:55,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936583412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:55,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270099317] [2021-06-05 20:39:55,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:55,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:39:55,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:55,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:55,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:56,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270099317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:56,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:56,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:56,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458008629] [2021-06-05 20:39:56,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:56,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:56,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:56,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:56,134 INFO L87 Difference]: Start difference. First operand 209 states and 421 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:57,034 INFO L93 Difference]: Finished difference Result 383 states and 752 transitions. [2021-06-05 20:39:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:39:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:57,034 INFO L225 Difference]: With dead ends: 383 [2021-06-05 20:39:57,034 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 20:39:57,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1002.1ms TimeCoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:39:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 20:39:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 207. [2021-06-05 20:39:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.0145631067961167) internal successors, (415), 206 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 415 transitions. [2021-06-05 20:39:57,037 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 415 transitions. Word has length 21 [2021-06-05 20:39:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:57,037 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 415 transitions. [2021-06-05 20:39:57,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 415 transitions. [2021-06-05 20:39:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:57,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:57,037 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:57,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 20:39:57,238 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1428239791, now seen corresponding path program 274 times [2021-06-05 20:39:57,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:57,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629747398] [2021-06-05 20:39:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:57,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:57,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629747398] [2021-06-05 20:39:57,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629747398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:57,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895352969] [2021-06-05 20:39:57,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:57,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:39:57,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:57,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:57,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:57,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895352969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:57,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:57,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:57,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643667399] [2021-06-05 20:39:57,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:57,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:57,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:57,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:57,834 INFO L87 Difference]: Start difference. First operand 207 states and 415 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:58,996 INFO L93 Difference]: Finished difference Result 372 states and 735 transitions. [2021-06-05 20:39:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:39:58,997 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:39:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:58,997 INFO L225 Difference]: With dead ends: 372 [2021-06-05 20:39:58,997 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 20:39:58,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1126.4ms TimeCoverageRelationStatistics Valid=516, Invalid=3024, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:39:58,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 20:39:58,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 205. [2021-06-05 20:39:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.0) internal successors, (408), 204 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 408 transitions. [2021-06-05 20:39:59,000 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 408 transitions. Word has length 21 [2021-06-05 20:39:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:59,000 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 408 transitions. [2021-06-05 20:39:59,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 408 transitions. [2021-06-05 20:39:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:39:59,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:59,000 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:59,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:59,223 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash -155189209, now seen corresponding path program 275 times [2021-06-05 20:39:59,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:59,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606231503] [2021-06-05 20:39:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:59,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:59,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606231503] [2021-06-05 20:39:59,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606231503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:59,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523716999] [2021-06-05 20:39:59,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:59,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:39:59,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:59,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:39:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:59,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523716999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:59,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:59,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:39:59,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952833725] [2021-06-05 20:39:59,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:39:59,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:59,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:39:59,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:39:59,810 INFO L87 Difference]: Start difference. First operand 205 states and 408 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:00,789 INFO L93 Difference]: Finished difference Result 359 states and 706 transitions. [2021-06-05 20:40:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:40:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:00,789 INFO L225 Difference]: With dead ends: 359 [2021-06-05 20:40:00,789 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 20:40:00,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=431, Invalid=2649, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:40:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 20:40:00,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 211. [2021-06-05 20:40:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.0238095238095237) internal successors, (425), 210 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 425 transitions. [2021-06-05 20:40:00,792 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 425 transitions. Word has length 21 [2021-06-05 20:40:00,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:00,792 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 425 transitions. [2021-06-05 20:40:00,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:00,792 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 425 transitions. [2021-06-05 20:40:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:00,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:00,792 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:00,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 20:40:00,993 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:00,993 INFO L82 PathProgramCache]: Analyzing trace with hash -162512029, now seen corresponding path program 276 times [2021-06-05 20:40:00,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:00,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592006254] [2021-06-05 20:40:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:01,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:01,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592006254] [2021-06-05 20:40:01,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592006254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:01,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156314204] [2021-06-05 20:40:01,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:01,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:40:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:01,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:01,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:01,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156314204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:01,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:01,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:01,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32747929] [2021-06-05 20:40:01,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:01,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:01,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:01,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:01,583 INFO L87 Difference]: Start difference. First operand 211 states and 425 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:02,577 INFO L93 Difference]: Finished difference Result 371 states and 729 transitions. [2021-06-05 20:40:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:40:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:02,578 INFO L225 Difference]: With dead ends: 371 [2021-06-05 20:40:02,578 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 20:40:02,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1029.7ms TimeCoverageRelationStatistics Valid=453, Invalid=2739, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:40:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 20:40:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 207. [2021-06-05 20:40:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.0145631067961167) internal successors, (415), 206 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 415 transitions. [2021-06-05 20:40:02,580 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 415 transitions. Word has length 21 [2021-06-05 20:40:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:02,580 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 415 transitions. [2021-06-05 20:40:02,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 415 transitions. [2021-06-05 20:40:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:02,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:02,581 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:02,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 20:40:02,781 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1948777315, now seen corresponding path program 277 times [2021-06-05 20:40:02,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:02,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256678068] [2021-06-05 20:40:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:02,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:02,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256678068] [2021-06-05 20:40:02,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256678068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:02,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86697258] [2021-06-05 20:40:02,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:02,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:03,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86697258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:03,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:03,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:03,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059917638] [2021-06-05 20:40:03,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:03,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:03,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:03,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:03,388 INFO L87 Difference]: Start difference. First operand 207 states and 415 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:04,416 INFO L93 Difference]: Finished difference Result 357 states and 706 transitions. [2021-06-05 20:40:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:40:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:04,417 INFO L225 Difference]: With dead ends: 357 [2021-06-05 20:40:04,417 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 20:40:04,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1082.2ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:40:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 20:40:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 201. [2021-06-05 20:40:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.0) internal successors, (400), 200 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 400 transitions. [2021-06-05 20:40:04,419 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 400 transitions. Word has length 21 [2021-06-05 20:40:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:04,419 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 400 transitions. [2021-06-05 20:40:04,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 400 transitions. [2021-06-05 20:40:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:04,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:04,420 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:04,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 20:40:04,620 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:04,621 INFO L82 PathProgramCache]: Analyzing trace with hash -635904299, now seen corresponding path program 278 times [2021-06-05 20:40:04,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:04,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077158244] [2021-06-05 20:40:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:04,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:04,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077158244] [2021-06-05 20:40:04,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077158244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:04,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219605504] [2021-06-05 20:40:04,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:04,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:04,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:04,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:05,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219605504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:05,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:05,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:05,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704052995] [2021-06-05 20:40:05,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:05,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:05,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:05,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:05,201 INFO L87 Difference]: Start difference. First operand 201 states and 400 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:06,236 INFO L93 Difference]: Finished difference Result 378 states and 743 transitions. [2021-06-05 20:40:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:40:06,237 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:06,237 INFO L225 Difference]: With dead ends: 378 [2021-06-05 20:40:06,237 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 20:40:06,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1003.0ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:40:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 20:40:06,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 211. [2021-06-05 20:40:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.0476190476190474) internal successors, (430), 210 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 430 transitions. [2021-06-05 20:40:06,240 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 430 transitions. Word has length 21 [2021-06-05 20:40:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:06,240 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 430 transitions. [2021-06-05 20:40:06,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 430 transitions. [2021-06-05 20:40:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:06,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:06,240 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:06,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:06,441 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash -643227119, now seen corresponding path program 279 times [2021-06-05 20:40:06,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:06,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991382305] [2021-06-05 20:40:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:06,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:06,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991382305] [2021-06-05 20:40:06,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991382305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:06,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801784254] [2021-06-05 20:40:06,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:06,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:40:06,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:06,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:07,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801784254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:07,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:07,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:07,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286882744] [2021-06-05 20:40:07,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:07,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:07,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:07,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:07,025 INFO L87 Difference]: Start difference. First operand 211 states and 430 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:08,211 INFO L93 Difference]: Finished difference Result 392 states and 768 transitions. [2021-06-05 20:40:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:40:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:08,212 INFO L225 Difference]: With dead ends: 392 [2021-06-05 20:40:08,212 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 20:40:08,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1036.8ms TimeCoverageRelationStatistics Valid=428, Invalid=2764, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:40:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 20:40:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 209. [2021-06-05 20:40:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0384615384615383) internal successors, (424), 208 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 424 transitions. [2021-06-05 20:40:08,214 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 424 transitions. Word has length 21 [2021-06-05 20:40:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:08,215 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 424 transitions. [2021-06-05 20:40:08,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 424 transitions. [2021-06-05 20:40:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:08,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:08,215 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:08,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:08,415 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:08,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1468062225, now seen corresponding path program 280 times [2021-06-05 20:40:08,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:08,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355342224] [2021-06-05 20:40:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:08,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355342224] [2021-06-05 20:40:08,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355342224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792304872] [2021-06-05 20:40:08,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:08,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:40:08,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:08,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:08,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:08,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792304872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:08,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:08,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:08,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708558709] [2021-06-05 20:40:08,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:08,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:08,996 INFO L87 Difference]: Start difference. First operand 209 states and 424 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:10,246 INFO L93 Difference]: Finished difference Result 397 states and 775 transitions. [2021-06-05 20:40:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:40:10,246 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:10,247 INFO L225 Difference]: With dead ends: 397 [2021-06-05 20:40:10,247 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 20:40:10,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1117.9ms TimeCoverageRelationStatistics Valid=496, Invalid=3044, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:40:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 20:40:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 207. [2021-06-05 20:40:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.0242718446601944) internal successors, (417), 206 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 417 transitions. [2021-06-05 20:40:10,249 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 417 transitions. Word has length 21 [2021-06-05 20:40:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:10,249 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 417 transitions. [2021-06-05 20:40:10,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 417 transitions. [2021-06-05 20:40:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:10,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:10,250 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:10,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:10,450 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:10,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:10,450 INFO L82 PathProgramCache]: Analyzing trace with hash -121632239, now seen corresponding path program 281 times [2021-06-05 20:40:10,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:10,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727436002] [2021-06-05 20:40:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:10,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:10,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727436002] [2021-06-05 20:40:10,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727436002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:10,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516025148] [2021-06-05 20:40:10,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:10,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:10,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:10,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:11,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516025148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:11,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:11,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:11,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305248936] [2021-06-05 20:40:11,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:11,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:11,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:11,025 INFO L87 Difference]: Start difference. First operand 207 states and 417 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:11,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:11,925 INFO L93 Difference]: Finished difference Result 353 states and 691 transitions. [2021-06-05 20:40:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:40:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:11,926 INFO L225 Difference]: With dead ends: 353 [2021-06-05 20:40:11,926 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 20:40:11,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 967.3ms TimeCoverageRelationStatistics Valid=419, Invalid=2551, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:40:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 20:40:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 206. [2021-06-05 20:40:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.0195121951219512) internal successors, (414), 205 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 414 transitions. [2021-06-05 20:40:11,929 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 414 transitions. Word has length 21 [2021-06-05 20:40:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:11,929 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 414 transitions. [2021-06-05 20:40:11,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 414 transitions. [2021-06-05 20:40:11,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:11,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:11,930 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:12,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 20:40:12,133 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:12,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:12,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2003772636, now seen corresponding path program 25 times [2021-06-05 20:40:12,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:12,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656411204] [2021-06-05 20:40:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:12,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:12,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656411204] [2021-06-05 20:40:12,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656411204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:12,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60015438] [2021-06-05 20:40:12,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:12,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:40:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:12,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60015438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:12,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:12,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 20:40:12,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263976322] [2021-06-05 20:40:12,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:40:12,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:40:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:40:12,424 INFO L87 Difference]: Start difference. First operand 206 states and 414 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:12,698 INFO L93 Difference]: Finished difference Result 341 states and 669 transitions. [2021-06-05 20:40:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 20:40:12,699 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:12,699 INFO L225 Difference]: With dead ends: 341 [2021-06-05 20:40:12,699 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 20:40:12,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:40:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 20:40:12,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 207. [2021-06-05 20:40:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.0097087378640777) internal successors, (414), 206 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 414 transitions. [2021-06-05 20:40:12,702 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 414 transitions. Word has length 21 [2021-06-05 20:40:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:12,702 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 414 transitions. [2021-06-05 20:40:12,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 414 transitions. [2021-06-05 20:40:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:12,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:12,703 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:12,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 20:40:12,917 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:12,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1830959566, now seen corresponding path program 26 times [2021-06-05 20:40:12,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:12,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652529994] [2021-06-05 20:40:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:13,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:13,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652529994] [2021-06-05 20:40:13,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652529994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:13,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581354402] [2021-06-05 20:40:13,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:13,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:40:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:13,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581354402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:13,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:13,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 20:40:13,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349795242] [2021-06-05 20:40:13,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:40:13,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:13,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:40:13,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:40:13,209 INFO L87 Difference]: Start difference. First operand 207 states and 414 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:13,673 INFO L93 Difference]: Finished difference Result 380 states and 751 transitions. [2021-06-05 20:40:13,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:40:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:13,674 INFO L225 Difference]: With dead ends: 380 [2021-06-05 20:40:13,674 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 20:40:13,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:40:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 20:40:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 207. [2021-06-05 20:40:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.0097087378640777) internal successors, (414), 206 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 414 transitions. [2021-06-05 20:40:13,677 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 414 transitions. Word has length 21 [2021-06-05 20:40:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:13,677 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 414 transitions. [2021-06-05 20:40:13,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 414 transitions. [2021-06-05 20:40:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:13,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:13,677 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:13,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 20:40:13,878 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1261916075, now seen corresponding path program 282 times [2021-06-05 20:40:13,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:13,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940464704] [2021-06-05 20:40:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:14,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:14,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940464704] [2021-06-05 20:40:14,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940464704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:14,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936230706] [2021-06-05 20:40:14,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:14,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:40:14,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:14,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:14,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936230706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:14,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:14,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:14,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678228161] [2021-06-05 20:40:14,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:14,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:14,446 INFO L87 Difference]: Start difference. First operand 207 states and 414 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:15,355 INFO L93 Difference]: Finished difference Result 348 states and 679 transitions. [2021-06-05 20:40:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:40:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:15,356 INFO L225 Difference]: With dead ends: 348 [2021-06-05 20:40:15,356 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 20:40:15,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1046.1ms TimeCoverageRelationStatistics Valid=450, Invalid=2742, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:40:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 20:40:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 206. [2021-06-05 20:40:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.004878048780488) internal successors, (411), 205 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 411 transitions. [2021-06-05 20:40:15,359 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 411 transitions. Word has length 21 [2021-06-05 20:40:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:15,359 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 411 transitions. [2021-06-05 20:40:15,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 411 transitions. [2021-06-05 20:40:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:15,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:15,359 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:15,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 20:40:15,560 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:15,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1188394402, now seen corresponding path program 27 times [2021-06-05 20:40:15,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:15,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670402204] [2021-06-05 20:40:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:15,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:15,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670402204] [2021-06-05 20:40:15,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670402204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:15,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742256046] [2021-06-05 20:40:15,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:15,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:40:15,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:15,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:40:15,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:15,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742256046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:15,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:15,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 20:40:15,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894644648] [2021-06-05 20:40:15,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:40:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:40:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:40:15,848 INFO L87 Difference]: Start difference. First operand 206 states and 411 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:16,298 INFO L93 Difference]: Finished difference Result 405 states and 798 transitions. [2021-06-05 20:40:16,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:40:16,298 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:16,299 INFO L225 Difference]: With dead ends: 405 [2021-06-05 20:40:16,299 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 20:40:16,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 514.9ms TimeCoverageRelationStatistics Valid=320, Invalid=940, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 20:40:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 20:40:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 209. [2021-06-05 20:40:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0096153846153846) internal successors, (418), 208 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 418 transitions. [2021-06-05 20:40:16,301 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 418 transitions. Word has length 21 [2021-06-05 20:40:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:16,301 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 418 transitions. [2021-06-05 20:40:16,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 418 transitions. [2021-06-05 20:40:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:16,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:16,302 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:16,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:16,502 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:16,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2054493777, now seen corresponding path program 283 times [2021-06-05 20:40:16,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:16,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650946495] [2021-06-05 20:40:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:16,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:16,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650946495] [2021-06-05 20:40:16,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650946495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:16,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921398534] [2021-06-05 20:40:16,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:16,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:16,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:17,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921398534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:17,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:17,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:17,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323243312] [2021-06-05 20:40:17,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:17,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:17,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:17,068 INFO L87 Difference]: Start difference. First operand 209 states and 418 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:17,861 INFO L93 Difference]: Finished difference Result 343 states and 670 transitions. [2021-06-05 20:40:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:40:17,861 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:17,862 INFO L225 Difference]: With dead ends: 343 [2021-06-05 20:40:17,862 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 20:40:17,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 914.6ms TimeCoverageRelationStatistics Valid=375, Invalid=2381, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:40:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 20:40:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 211. [2021-06-05 20:40:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.0047619047619047) internal successors, (421), 210 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:17,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 421 transitions. [2021-06-05 20:40:17,864 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 421 transitions. Word has length 21 [2021-06-05 20:40:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:17,864 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 421 transitions. [2021-06-05 20:40:17,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 421 transitions. [2021-06-05 20:40:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:17,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:17,865 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:18,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 20:40:18,065 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 832871017, now seen corresponding path program 284 times [2021-06-05 20:40:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:18,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363337054] [2021-06-05 20:40:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:18,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:18,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363337054] [2021-06-05 20:40:18,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363337054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:18,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897015951] [2021-06-05 20:40:18,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:18,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:18,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:18,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:18,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:18,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897015951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:18,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:18,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:18,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616999437] [2021-06-05 20:40:18,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:18,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:18,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:18,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:18,688 INFO L87 Difference]: Start difference. First operand 211 states and 421 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:19,713 INFO L93 Difference]: Finished difference Result 360 states and 708 transitions. [2021-06-05 20:40:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:40:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:19,714 INFO L225 Difference]: With dead ends: 360 [2021-06-05 20:40:19,714 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 20:40:19,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 987.5ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:40:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 20:40:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 216. [2021-06-05 20:40:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.027906976744186) internal successors, (436), 215 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 436 transitions. [2021-06-05 20:40:19,716 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 436 transitions. Word has length 21 [2021-06-05 20:40:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:19,716 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 436 transitions. [2021-06-05 20:40:19,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 436 transitions. [2021-06-05 20:40:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:19,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:19,717 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:19,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:19,917 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:19,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:19,917 INFO L82 PathProgramCache]: Analyzing trace with hash 825548197, now seen corresponding path program 285 times [2021-06-05 20:40:19,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:19,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30293615] [2021-06-05 20:40:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:20,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:20,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30293615] [2021-06-05 20:40:20,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30293615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:20,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207942515] [2021-06-05 20:40:20,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:20,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:40:20,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:20,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:20,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:20,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207942515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:20,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:20,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:20,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923809885] [2021-06-05 20:40:20,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:20,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:20,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:20,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:20,508 INFO L87 Difference]: Start difference. First operand 216 states and 436 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:21,412 INFO L93 Difference]: Finished difference Result 374 states and 733 transitions. [2021-06-05 20:40:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:40:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:21,413 INFO L225 Difference]: With dead ends: 374 [2021-06-05 20:40:21,413 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 20:40:21,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 975.0ms TimeCoverageRelationStatistics Valid=400, Invalid=2680, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:40:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 20:40:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 214. [2021-06-05 20:40:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0187793427230045) internal successors, (430), 213 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 430 transitions. [2021-06-05 20:40:21,416 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 430 transitions. Word has length 21 [2021-06-05 20:40:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:21,416 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 430 transitions. [2021-06-05 20:40:21,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 430 transitions. [2021-06-05 20:40:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:21,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:21,416 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:21,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 20:40:21,616 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1358129755, now seen corresponding path program 286 times [2021-06-05 20:40:21,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:21,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259486660] [2021-06-05 20:40:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:21,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:21,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259486660] [2021-06-05 20:40:21,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259486660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:21,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121285351] [2021-06-05 20:40:21,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:21,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:40:21,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:21,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:22,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121285351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:22,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:22,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:22,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425404793] [2021-06-05 20:40:22,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:22,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:22,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:22,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:22,197 INFO L87 Difference]: Start difference. First operand 214 states and 430 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:23,384 INFO L93 Difference]: Finished difference Result 365 states and 720 transitions. [2021-06-05 20:40:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:40:23,385 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:23,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:23,385 INFO L225 Difference]: With dead ends: 365 [2021-06-05 20:40:23,385 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 20:40:23,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=470, Invalid=2952, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:40:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 20:40:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 212. [2021-06-05 20:40:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.004739336492891) internal successors, (423), 211 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 423 transitions. [2021-06-05 20:40:23,388 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 423 transitions. Word has length 21 [2021-06-05 20:40:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:23,388 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 423 transitions. [2021-06-05 20:40:23,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 423 transitions. [2021-06-05 20:40:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:23,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:23,388 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:23,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 20:40:23,589 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:23,589 INFO L82 PathProgramCache]: Analyzing trace with hash -85079173, now seen corresponding path program 287 times [2021-06-05 20:40:23,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:23,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971473537] [2021-06-05 20:40:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:23,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:23,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971473537] [2021-06-05 20:40:23,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971473537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:23,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125758430] [2021-06-05 20:40:23,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:23,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:40:23,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:23,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:24,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125758430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:24,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:24,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:24,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022712939] [2021-06-05 20:40:24,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:24,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:24,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:24,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:24,182 INFO L87 Difference]: Start difference. First operand 212 states and 423 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:25,197 INFO L93 Difference]: Finished difference Result 352 states and 692 transitions. [2021-06-05 20:40:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:40:25,198 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:25,198 INFO L225 Difference]: With dead ends: 352 [2021-06-05 20:40:25,198 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 20:40:25,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1005.0ms TimeCoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:40:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 20:40:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 218. [2021-06-05 20:40:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.0276497695852536) internal successors, (440), 217 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 440 transitions. [2021-06-05 20:40:25,200 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 440 transitions. Word has length 21 [2021-06-05 20:40:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:25,201 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 440 transitions. [2021-06-05 20:40:25,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 440 transitions. [2021-06-05 20:40:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:25,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:25,201 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:25,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:25,401 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash -92401993, now seen corresponding path program 288 times [2021-06-05 20:40:25,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:25,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024572839] [2021-06-05 20:40:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:25,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:25,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024572839] [2021-06-05 20:40:25,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024572839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:25,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290447526] [2021-06-05 20:40:25,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:25,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:40:25,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:25,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:25,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290447526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:25,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:25,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:25,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281645017] [2021-06-05 20:40:25,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:25,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:25,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:25,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:25,983 INFO L87 Difference]: Start difference. First operand 218 states and 440 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:27,029 INFO L93 Difference]: Finished difference Result 366 states and 717 transitions. [2021-06-05 20:40:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:40:27,029 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:27,030 INFO L225 Difference]: With dead ends: 366 [2021-06-05 20:40:27,030 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 20:40:27,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 985.2ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:40:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 20:40:27,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 214. [2021-06-05 20:40:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0187793427230045) internal successors, (430), 213 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 430 transitions. [2021-06-05 20:40:27,032 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 430 transitions. Word has length 21 [2021-06-05 20:40:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:27,032 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 430 transitions. [2021-06-05 20:40:27,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 430 transitions. [2021-06-05 20:40:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:27,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:27,033 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:27,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2021-06-05 20:40:27,233 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:27,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:27,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2018887351, now seen corresponding path program 289 times [2021-06-05 20:40:27,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:27,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294947631] [2021-06-05 20:40:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:27,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294947631] [2021-06-05 20:40:27,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294947631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875197648] [2021-06-05 20:40:27,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:27,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:27,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:27,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875197648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:27,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:27,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:27,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601234966] [2021-06-05 20:40:27,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:27,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:27,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:27,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:27,826 INFO L87 Difference]: Start difference. First operand 214 states and 430 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:28,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:28,844 INFO L93 Difference]: Finished difference Result 356 states and 702 transitions. [2021-06-05 20:40:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:40:28,845 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:28,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:28,845 INFO L225 Difference]: With dead ends: 356 [2021-06-05 20:40:28,845 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 20:40:28,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1031.5ms TimeCoverageRelationStatistics Valid=450, Invalid=2742, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:40:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 20:40:28,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 209. [2021-06-05 20:40:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0048076923076925) internal successors, (417), 208 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 417 transitions. [2021-06-05 20:40:28,848 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 417 transitions. Word has length 21 [2021-06-05 20:40:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:28,848 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 417 transitions. [2021-06-05 20:40:28,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 417 transitions. [2021-06-05 20:40:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:28,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:28,848 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:29,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 20:40:29,053 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:29,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1857410289, now seen corresponding path program 290 times [2021-06-05 20:40:29,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:29,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060448344] [2021-06-05 20:40:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:29,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:29,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060448344] [2021-06-05 20:40:29,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060448344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:29,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337225734] [2021-06-05 20:40:29,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:29,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:29,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:29,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:29,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:29,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337225734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:29,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:29,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:29,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710263386] [2021-06-05 20:40:29,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:29,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:29,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:29,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:29,622 INFO L87 Difference]: Start difference. First operand 209 states and 417 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:30,685 INFO L93 Difference]: Finished difference Result 360 states and 698 transitions. [2021-06-05 20:40:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:40:30,686 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:30,686 INFO L225 Difference]: With dead ends: 360 [2021-06-05 20:40:30,686 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 20:40:30,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1088.7ms TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:40:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 20:40:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 214. [2021-06-05 20:40:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0093896713615025) internal successors, (428), 213 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 428 transitions. [2021-06-05 20:40:30,688 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 428 transitions. Word has length 21 [2021-06-05 20:40:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:30,688 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 428 transitions. [2021-06-05 20:40:30,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 428 transitions. [2021-06-05 20:40:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:30,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:30,689 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:30,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:30,889 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:30,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1897075653, now seen corresponding path program 291 times [2021-06-05 20:40:30,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:30,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907344298] [2021-06-05 20:40:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:31,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907344298] [2021-06-05 20:40:31,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907344298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620283075] [2021-06-05 20:40:31,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:31,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:40:31,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:31,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:31,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:31,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620283075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:31,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:31,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:31,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119297835] [2021-06-05 20:40:31,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:31,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:31,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:31,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:31,447 INFO L87 Difference]: Start difference. First operand 214 states and 428 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:32,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:32,421 INFO L93 Difference]: Finished difference Result 375 states and 719 transitions. [2021-06-05 20:40:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:40:32,422 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:32,422 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:40:32,422 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 20:40:32,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1055.5ms TimeCoverageRelationStatistics Valid=359, Invalid=2293, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:40:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 20:40:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 216. [2021-06-05 20:40:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0093023255813955) internal successors, (432), 215 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 432 transitions. [2021-06-05 20:40:32,424 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 432 transitions. Word has length 21 [2021-06-05 20:40:32,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:32,425 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 432 transitions. [2021-06-05 20:40:32,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 432 transitions. [2021-06-05 20:40:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:32,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:32,425 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:32,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 20:40:32,625 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:32,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1254982031, now seen corresponding path program 292 times [2021-06-05 20:40:32,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:32,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583238458] [2021-06-05 20:40:32,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:32,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:32,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583238458] [2021-06-05 20:40:32,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583238458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:32,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837693683] [2021-06-05 20:40:32,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:32,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:40:32,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:32,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:33,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837693683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:33,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:33,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:33,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47939565] [2021-06-05 20:40:33,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:33,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:33,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:33,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:33,185 INFO L87 Difference]: Start difference. First operand 216 states and 432 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:34,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:34,266 INFO L93 Difference]: Finished difference Result 373 states and 717 transitions. [2021-06-05 20:40:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:40:34,267 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:34,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:34,267 INFO L225 Difference]: With dead ends: 373 [2021-06-05 20:40:34,267 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 20:40:34,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1081.5ms TimeCoverageRelationStatistics Valid=363, Invalid=2289, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:40:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 20:40:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 218. [2021-06-05 20:40:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.0092165898617513) internal successors, (436), 217 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 436 transitions. [2021-06-05 20:40:34,269 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 436 transitions. Word has length 21 [2021-06-05 20:40:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:34,269 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 436 transitions. [2021-06-05 20:40:34,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 436 transitions. [2021-06-05 20:40:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:34,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:34,270 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:34,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:34,470 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:34,470 INFO L82 PathProgramCache]: Analyzing trace with hash -362807325, now seen corresponding path program 293 times [2021-06-05 20:40:34,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:34,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607595628] [2021-06-05 20:40:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:34,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607595628] [2021-06-05 20:40:34,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607595628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:34,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737678585] [2021-06-05 20:40:34,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:34,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:34,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:34,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:34,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:35,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737678585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:35,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:35,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:35,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899082465] [2021-06-05 20:40:35,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:35,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:35,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:35,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:35,042 INFO L87 Difference]: Start difference. First operand 218 states and 436 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:35,974 INFO L93 Difference]: Finished difference Result 371 states and 715 transitions. [2021-06-05 20:40:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:40:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:35,974 INFO L225 Difference]: With dead ends: 371 [2021-06-05 20:40:35,974 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 20:40:35,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1072.0ms TimeCoverageRelationStatistics Valid=362, Invalid=2290, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:40:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 20:40:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 220. [2021-06-05 20:40:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.009132420091324) internal successors, (440), 219 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 440 transitions. [2021-06-05 20:40:35,977 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 440 transitions. Word has length 21 [2021-06-05 20:40:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:35,977 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 440 transitions. [2021-06-05 20:40:35,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 440 transitions. [2021-06-05 20:40:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:35,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:35,977 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:36,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 20:40:36,178 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2076477407, now seen corresponding path program 294 times [2021-06-05 20:40:36,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:36,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903028617] [2021-06-05 20:40:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:36,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:36,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903028617] [2021-06-05 20:40:36,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903028617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:36,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440597396] [2021-06-05 20:40:36,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:36,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:40:36,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:36,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:36,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:36,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440597396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:36,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:36,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:36,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578470890] [2021-06-05 20:40:36,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:36,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:36,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:36,738 INFO L87 Difference]: Start difference. First operand 220 states and 440 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:38,069 INFO L93 Difference]: Finished difference Result 406 states and 768 transitions. [2021-06-05 20:40:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:40:38,069 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:38,070 INFO L225 Difference]: With dead ends: 406 [2021-06-05 20:40:38,070 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 20:40:38,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1365.1ms TimeCoverageRelationStatistics Valid=512, Invalid=2910, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:40:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 20:40:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 230. [2021-06-05 20:40:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.0262008733624453) internal successors, (464), 229 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 464 transitions. [2021-06-05 20:40:38,073 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 464 transitions. Word has length 21 [2021-06-05 20:40:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:38,073 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 464 transitions. [2021-06-05 20:40:38,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 464 transitions. [2021-06-05 20:40:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:38,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:38,073 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:38,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:38,274 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2069154587, now seen corresponding path program 295 times [2021-06-05 20:40:38,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:38,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116734196] [2021-06-05 20:40:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:38,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:38,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116734196] [2021-06-05 20:40:38,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116734196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:38,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744387202] [2021-06-05 20:40:38,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:38,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:38,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:38,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744387202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:38,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:38,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:38,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880546227] [2021-06-05 20:40:38,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:38,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:38,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:38,829 INFO L87 Difference]: Start difference. First operand 230 states and 464 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:40,163 INFO L93 Difference]: Finished difference Result 406 states and 779 transitions. [2021-06-05 20:40:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:40:40,163 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:40,163 INFO L225 Difference]: With dead ends: 406 [2021-06-05 20:40:40,164 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 20:40:40,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1254.6ms TimeCoverageRelationStatistics Valid=502, Invalid=3158, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:40:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 20:40:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 212. [2021-06-05 20:40:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.009478672985782) internal successors, (424), 211 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 424 transitions. [2021-06-05 20:40:40,166 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 424 transitions. Word has length 21 [2021-06-05 20:40:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:40,166 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 424 transitions. [2021-06-05 20:40:40,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 424 transitions. [2021-06-05 20:40:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:40,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:40,167 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:40,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 20:40:40,367 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:40,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:40,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2105368961, now seen corresponding path program 296 times [2021-06-05 20:40:40,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:40,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952129910] [2021-06-05 20:40:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:40,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952129910] [2021-06-05 20:40:40,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952129910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442521449] [2021-06-05 20:40:40,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:40,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:40,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:40,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:40,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442521449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:40,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:40,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:40,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929715014] [2021-06-05 20:40:40,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:40,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:40,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:40,940 INFO L87 Difference]: Start difference. First operand 212 states and 424 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:41,687 INFO L93 Difference]: Finished difference Result 392 states and 762 transitions. [2021-06-05 20:40:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:40:41,687 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:41,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:41,688 INFO L225 Difference]: With dead ends: 392 [2021-06-05 20:40:41,688 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 20:40:41,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 855.4ms TimeCoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:40:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 20:40:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 216. [2021-06-05 20:40:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.013953488372093) internal successors, (433), 215 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 433 transitions. [2021-06-05 20:40:41,690 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 433 transitions. Word has length 21 [2021-06-05 20:40:41,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:41,691 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 433 transitions. [2021-06-05 20:40:41,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 433 transitions. [2021-06-05 20:40:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:41,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:41,691 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:41,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:41,891 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:41,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:41,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1046688723, now seen corresponding path program 297 times [2021-06-05 20:40:41,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:41,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472128086] [2021-06-05 20:40:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:42,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:42,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472128086] [2021-06-05 20:40:42,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472128086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:42,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629023425] [2021-06-05 20:40:42,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:42,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:40:42,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:42,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:42,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629023425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:42,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:42,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:42,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872308420] [2021-06-05 20:40:42,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:42,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:42,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:42,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:42,465 INFO L87 Difference]: Start difference. First operand 216 states and 433 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:43,279 INFO L93 Difference]: Finished difference Result 399 states and 773 transitions. [2021-06-05 20:40:43,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:40:43,279 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:43,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:43,279 INFO L225 Difference]: With dead ends: 399 [2021-06-05 20:40:43,279 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 20:40:43,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 850.3ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:40:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 20:40:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 218. [2021-06-05 20:40:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.013824884792627) internal successors, (437), 217 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 437 transitions. [2021-06-05 20:40:43,283 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 437 transitions. Word has length 21 [2021-06-05 20:40:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:43,283 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 437 transitions. [2021-06-05 20:40:43,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 437 transitions. [2021-06-05 20:40:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:43,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:43,283 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:43,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:43,497 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash -154514017, now seen corresponding path program 298 times [2021-06-05 20:40:43,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:43,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109126358] [2021-06-05 20:40:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:43,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:43,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109126358] [2021-06-05 20:40:43,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109126358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:43,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826735695] [2021-06-05 20:40:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:43,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:40:43,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:43,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:44,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826735695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:44,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:44,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:44,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987563037] [2021-06-05 20:40:44,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:44,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:44,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:44,067 INFO L87 Difference]: Start difference. First operand 218 states and 437 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:44,914 INFO L93 Difference]: Finished difference Result 397 states and 771 transitions. [2021-06-05 20:40:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:40:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:44,915 INFO L225 Difference]: With dead ends: 397 [2021-06-05 20:40:44,915 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 20:40:44,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 842.8ms TimeCoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:40:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 20:40:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 220. [2021-06-05 20:40:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0136986301369864) internal successors, (441), 219 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 441 transitions. [2021-06-05 20:40:44,918 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 441 transitions. Word has length 21 [2021-06-05 20:40:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:44,918 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 441 transitions. [2021-06-05 20:40:44,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 441 transitions. [2021-06-05 20:40:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:44,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:44,918 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:45,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-06-05 20:40:45,119 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:45,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:45,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2010196581, now seen corresponding path program 299 times [2021-06-05 20:40:45,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:45,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738225452] [2021-06-05 20:40:45,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:45,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:45,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738225452] [2021-06-05 20:40:45,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738225452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:45,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210218115] [2021-06-05 20:40:45,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:45,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:45,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:45,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:45,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:45,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210218115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:45,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:45,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:45,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150901042] [2021-06-05 20:40:45,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:45,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:45,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:45,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:45,682 INFO L87 Difference]: Start difference. First operand 220 states and 441 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:46,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:46,659 INFO L93 Difference]: Finished difference Result 414 states and 797 transitions. [2021-06-05 20:40:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:40:46,659 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:46,660 INFO L225 Difference]: With dead ends: 414 [2021-06-05 20:40:46,660 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 20:40:46,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 897.3ms TimeCoverageRelationStatistics Valid=313, Invalid=2137, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:40:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 20:40:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 224. [2021-06-05 20:40:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.022421524663677) internal successors, (451), 223 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 451 transitions. [2021-06-05 20:40:46,662 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 451 transitions. Word has length 21 [2021-06-05 20:40:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:46,663 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 451 transitions. [2021-06-05 20:40:46,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 451 transitions. [2021-06-05 20:40:46,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:46,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:46,663 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:46,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:46,863 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:46,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2017519401, now seen corresponding path program 300 times [2021-06-05 20:40:46,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:46,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763468804] [2021-06-05 20:40:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:47,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:47,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763468804] [2021-06-05 20:40:47,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763468804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:47,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949206200] [2021-06-05 20:40:47,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:47,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:40:47,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:47,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:47,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:47,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949206200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:47,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:47,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:47,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815414730] [2021-06-05 20:40:47,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:47,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:47,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:47,422 INFO L87 Difference]: Start difference. First operand 224 states and 451 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:48,372 INFO L93 Difference]: Finished difference Result 429 states and 828 transitions. [2021-06-05 20:40:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:40:48,373 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:48,373 INFO L225 Difference]: With dead ends: 429 [2021-06-05 20:40:48,373 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 20:40:48,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 981.9ms TimeCoverageRelationStatistics Valid=392, Invalid=2688, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:40:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 20:40:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 227. [2021-06-05 20:40:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.017699115044248) internal successors, (456), 226 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 456 transitions. [2021-06-05 20:40:48,376 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 456 transitions. Word has length 21 [2021-06-05 20:40:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:48,376 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 456 transitions. [2021-06-05 20:40:48,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 456 transitions. [2021-06-05 20:40:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:48,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:48,377 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:48,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:48,581 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash 78912177, now seen corresponding path program 301 times [2021-06-05 20:40:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:48,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091074841] [2021-06-05 20:40:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:48,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:48,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091074841] [2021-06-05 20:40:48,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091074841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:48,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089369366] [2021-06-05 20:40:48,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:48,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:48,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:49,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089369366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:49,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:49,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:49,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979384087] [2021-06-05 20:40:49,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:49,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:49,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:49,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:49,147 INFO L87 Difference]: Start difference. First operand 227 states and 456 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:49,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:49,985 INFO L93 Difference]: Finished difference Result 407 states and 791 transitions. [2021-06-05 20:40:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:40:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:49,986 INFO L225 Difference]: With dead ends: 407 [2021-06-05 20:40:49,986 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 20:40:49,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 884.5ms TimeCoverageRelationStatistics Valid=298, Invalid=2054, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:40:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 20:40:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 231. [2021-06-05 20:40:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.0217391304347827) internal successors, (465), 230 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 465 transitions. [2021-06-05 20:40:49,989 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 465 transitions. Word has length 21 [2021-06-05 20:40:49,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:49,989 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 465 transitions. [2021-06-05 20:40:49,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:49,989 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 465 transitions. [2021-06-05 20:40:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:49,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:49,989 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:50,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 20:40:50,190 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash 971086883, now seen corresponding path program 302 times [2021-06-05 20:40:50,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:50,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048406298] [2021-06-05 20:40:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:50,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:50,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048406298] [2021-06-05 20:40:50,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048406298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:50,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997330570] [2021-06-05 20:40:50,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:50,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:50,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:50,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:50,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997330570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:50,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:50,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:50,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002662099] [2021-06-05 20:40:50,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:50,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:50,770 INFO L87 Difference]: Start difference. First operand 231 states and 465 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:51,665 INFO L93 Difference]: Finished difference Result 410 states and 796 transitions. [2021-06-05 20:40:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:40:51,666 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:51,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:51,666 INFO L225 Difference]: With dead ends: 410 [2021-06-05 20:40:51,666 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 20:40:51,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 905.3ms TimeCoverageRelationStatistics Valid=298, Invalid=2054, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:40:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 20:40:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 233. [2021-06-05 20:40:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.021551724137931) internal successors, (469), 232 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:51,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 469 transitions. [2021-06-05 20:40:51,669 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 469 transitions. Word has length 21 [2021-06-05 20:40:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:51,669 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 469 transitions. [2021-06-05 20:40:51,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 469 transitions. [2021-06-05 20:40:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:51,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:51,669 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:51,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 20:40:51,869 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash -884595681, now seen corresponding path program 303 times [2021-06-05 20:40:51,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:51,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992066856] [2021-06-05 20:40:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:52,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:52,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992066856] [2021-06-05 20:40:52,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992066856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:52,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160167095] [2021-06-05 20:40:52,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:52,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:40:52,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:52,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:52,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:52,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160167095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:52,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:52,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:52,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417972105] [2021-06-05 20:40:52,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:52,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:52,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:52,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:52,444 INFO L87 Difference]: Start difference. First operand 233 states and 469 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:53,594 INFO L93 Difference]: Finished difference Result 429 states and 824 transitions. [2021-06-05 20:40:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:40:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:53,595 INFO L225 Difference]: With dead ends: 429 [2021-06-05 20:40:53,595 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 20:40:53,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1142.1ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:40:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 20:40:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 237. [2021-06-05 20:40:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.0296610169491527) internal successors, (479), 236 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 479 transitions. [2021-06-05 20:40:53,598 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 479 transitions. Word has length 21 [2021-06-05 20:40:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:53,598 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 479 transitions. [2021-06-05 20:40:53,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 479 transitions. [2021-06-05 20:40:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:53,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:53,598 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:53,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 20:40:53,799 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:53,799 INFO L82 PathProgramCache]: Analyzing trace with hash -891918501, now seen corresponding path program 304 times [2021-06-05 20:40:53,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:53,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66855138] [2021-06-05 20:40:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:53,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:53,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66855138] [2021-06-05 20:40:53,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66855138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:53,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044688091] [2021-06-05 20:40:53,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:53,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:40:53,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:53,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:53,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:54,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044688091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:54,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:54,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:54,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233322304] [2021-06-05 20:40:54,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:54,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:54,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:54,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:54,368 INFO L87 Difference]: Start difference. First operand 237 states and 479 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:55,610 INFO L93 Difference]: Finished difference Result 458 states and 884 transitions. [2021-06-05 20:40:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:40:55,611 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:55,611 INFO L225 Difference]: With dead ends: 458 [2021-06-05 20:40:55,611 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 20:40:55,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1133.9ms TimeCoverageRelationStatistics Valid=466, Invalid=3074, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:40:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 20:40:55,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 231. [2021-06-05 20:40:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.026086956521739) internal successors, (466), 230 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 466 transitions. [2021-06-05 20:40:55,614 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 466 transitions. Word has length 21 [2021-06-05 20:40:55,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:55,614 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 466 transitions. [2021-06-05 20:40:55,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:55,614 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 466 transitions. [2021-06-05 20:40:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:55,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:55,614 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:55,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:55,815 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:55,815 INFO L82 PathProgramCache]: Analyzing trace with hash 730640735, now seen corresponding path program 305 times [2021-06-05 20:40:55,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:55,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315090228] [2021-06-05 20:40:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:55,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:55,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315090228] [2021-06-05 20:40:55,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315090228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:55,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359363263] [2021-06-05 20:40:55,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:56,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:56,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:56,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:56,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:56,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359363263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:56,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:56,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:56,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872490099] [2021-06-05 20:40:56,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:56,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:56,390 INFO L87 Difference]: Start difference. First operand 231 states and 466 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:57,384 INFO L93 Difference]: Finished difference Result 407 states and 792 transitions. [2021-06-05 20:40:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:40:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:57,385 INFO L225 Difference]: With dead ends: 407 [2021-06-05 20:40:57,385 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 20:40:57,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 975.7ms TimeCoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:40:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 20:40:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 235. [2021-06-05 20:40:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.02991452991453) internal successors, (475), 234 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 475 transitions. [2021-06-05 20:40:57,388 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 475 transitions. Word has length 21 [2021-06-05 20:40:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:57,388 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 475 transitions. [2021-06-05 20:40:57,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 475 transitions. [2021-06-05 20:40:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:57,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:57,388 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:57,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 20:40:57,589 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1125041829, now seen corresponding path program 306 times [2021-06-05 20:40:57,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:57,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562117487] [2021-06-05 20:40:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:57,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:57,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562117487] [2021-06-05 20:40:57,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562117487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:57,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661683419] [2021-06-05 20:40:57,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:57,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:40:57,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:57,781 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:57,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:58,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661683419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:58,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:58,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:40:58,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894422500] [2021-06-05 20:40:58,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:40:58,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:58,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:40:58,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:40:58,165 INFO L87 Difference]: Start difference. First operand 235 states and 475 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:59,257 INFO L93 Difference]: Finished difference Result 424 states and 818 transitions. [2021-06-05 20:40:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:40:59,257 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:40:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:59,258 INFO L225 Difference]: With dead ends: 424 [2021-06-05 20:40:59,258 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 20:40:59,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1093.1ms TimeCoverageRelationStatistics Valid=406, Invalid=2564, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:40:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 20:40:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 239. [2021-06-05 20:40:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.03781512605042) internal successors, (485), 238 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 485 transitions. [2021-06-05 20:40:59,260 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 485 transitions. Word has length 21 [2021-06-05 20:40:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:59,261 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 485 transitions. [2021-06-05 20:40:59,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 485 transitions. [2021-06-05 20:40:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:40:59,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:59,261 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:59,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 20:40:59,461 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:59,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1132364649, now seen corresponding path program 307 times [2021-06-05 20:40:59,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:59,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516710719] [2021-06-05 20:40:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:59,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:59,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516710719] [2021-06-05 20:40:59,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516710719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:59,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534685369] [2021-06-05 20:40:59,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:59,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:40:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:00,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534685369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:00,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:00,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:00,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539724586] [2021-06-05 20:41:00,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:00,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:00,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:00,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:00,028 INFO L87 Difference]: Start difference. First operand 239 states and 485 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:01,157 INFO L93 Difference]: Finished difference Result 451 states and 874 transitions. [2021-06-05 20:41:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:41:01,157 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:01,158 INFO L225 Difference]: With dead ends: 451 [2021-06-05 20:41:01,158 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 20:41:01,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1099.6ms TimeCoverageRelationStatistics Valid=453, Invalid=2969, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:41:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 20:41:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 235. [2021-06-05 20:41:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.034188034188034) internal successors, (476), 234 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 476 transitions. [2021-06-05 20:41:01,161 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 476 transitions. Word has length 21 [2021-06-05 20:41:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:01,161 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 476 transitions. [2021-06-05 20:41:01,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 476 transitions. [2021-06-05 20:41:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:01,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:01,161 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:01,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:01,362 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash -381322917, now seen corresponding path program 308 times [2021-06-05 20:41:01,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:01,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681278869] [2021-06-05 20:41:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:01,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:01,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681278869] [2021-06-05 20:41:01,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681278869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:01,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768658981] [2021-06-05 20:41:01,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:01,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:01,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:01,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:01,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:01,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768658981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:01,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:01,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:01,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175148537] [2021-06-05 20:41:01,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:01,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:01,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:01,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:01,942 INFO L87 Difference]: Start difference. First operand 235 states and 476 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:03,414 INFO L93 Difference]: Finished difference Result 473 states and 910 transitions. [2021-06-05 20:41:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:41:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:03,415 INFO L225 Difference]: With dead ends: 473 [2021-06-05 20:41:03,415 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 20:41:03,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1277.1ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:41:03,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 20:41:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 243. [2021-06-05 20:41:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.0578512396694215) internal successors, (498), 242 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 498 transitions. [2021-06-05 20:41:03,418 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 498 transitions. Word has length 21 [2021-06-05 20:41:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:03,419 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 498 transitions. [2021-06-05 20:41:03,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 498 transitions. [2021-06-05 20:41:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:03,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:03,419 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:03,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:03,629 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:03,629 INFO L82 PathProgramCache]: Analyzing trace with hash -388645737, now seen corresponding path program 309 times [2021-06-05 20:41:03,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:03,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145931698] [2021-06-05 20:41:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:03,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:03,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145931698] [2021-06-05 20:41:03,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145931698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:03,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306123206] [2021-06-05 20:41:03,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:03,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:41:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:03,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:03,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:04,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306123206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:04,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:04,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:04,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214164041] [2021-06-05 20:41:04,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:04,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:04,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:04,205 INFO L87 Difference]: Start difference. First operand 243 states and 498 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:05,785 INFO L93 Difference]: Finished difference Result 519 states and 1000 transitions. [2021-06-05 20:41:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 20:41:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:05,786 INFO L225 Difference]: With dead ends: 519 [2021-06-05 20:41:05,786 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 20:41:05,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1387.0ms TimeCoverageRelationStatistics Valid=634, Invalid=4058, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:41:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 20:41:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 243. [2021-06-05 20:41:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.0661157024793386) internal successors, (500), 242 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 500 transitions. [2021-06-05 20:41:05,789 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 500 transitions. Word has length 21 [2021-06-05 20:41:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:05,789 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 500 transitions. [2021-06-05 20:41:05,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 500 transitions. [2021-06-05 20:41:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:05,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:05,790 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:05,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:05,990 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:05,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1722643607, now seen corresponding path program 310 times [2021-06-05 20:41:05,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:05,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539645055] [2021-06-05 20:41:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:06,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:06,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539645055] [2021-06-05 20:41:06,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539645055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:06,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952963679] [2021-06-05 20:41:06,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:06,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:41:06,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:06,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:06,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:06,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952963679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:06,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:06,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:06,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27796170] [2021-06-05 20:41:06,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:06,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:06,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:06,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:06,561 INFO L87 Difference]: Start difference. First operand 243 states and 500 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:07,997 INFO L93 Difference]: Finished difference Result 480 states and 939 transitions. [2021-06-05 20:41:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 20:41:07,998 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:07,998 INFO L225 Difference]: With dead ends: 480 [2021-06-05 20:41:07,998 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 20:41:07,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1302.7ms TimeCoverageRelationStatistics Valid=563, Invalid=3597, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 20:41:07,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 20:41:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 231. [2021-06-05 20:41:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.034782608695652) internal successors, (468), 230 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 468 transitions. [2021-06-05 20:41:08,001 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 468 transitions. Word has length 21 [2021-06-05 20:41:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:08,001 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 468 transitions. [2021-06-05 20:41:08,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 468 transitions. [2021-06-05 20:41:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:08,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:08,001 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:08,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:08,202 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:08,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1046416381, now seen corresponding path program 311 times [2021-06-05 20:41:08,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:08,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375071117] [2021-06-05 20:41:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:08,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:08,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375071117] [2021-06-05 20:41:08,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375071117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:08,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012324940] [2021-06-05 20:41:08,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:08,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:08,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:08,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:08,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012324940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:08,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:08,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:08,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675704566] [2021-06-05 20:41:08,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:08,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:08,769 INFO L87 Difference]: Start difference. First operand 231 states and 468 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:09,430 INFO L93 Difference]: Finished difference Result 352 states and 700 transitions. [2021-06-05 20:41:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:41:09,431 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:09,431 INFO L225 Difference]: With dead ends: 352 [2021-06-05 20:41:09,431 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 20:41:09,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 784.1ms TimeCoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:41:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 20:41:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 236. [2021-06-05 20:41:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.0382978723404257) internal successors, (479), 235 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 479 transitions. [2021-06-05 20:41:09,434 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 479 transitions. Word has length 21 [2021-06-05 20:41:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:09,434 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 479 transitions. [2021-06-05 20:41:09,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 479 transitions. [2021-06-05 20:41:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:09,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:09,434 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:09,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 20:41:09,635 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:09,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2105641303, now seen corresponding path program 312 times [2021-06-05 20:41:09,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:09,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136908360] [2021-06-05 20:41:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:09,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:09,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136908360] [2021-06-05 20:41:09,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136908360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:09,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025770555] [2021-06-05 20:41:09,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:09,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:41:09,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:09,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:10,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025770555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:10,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:10,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:10,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329034726] [2021-06-05 20:41:10,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:10,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:10,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:10,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:10,210 INFO L87 Difference]: Start difference. First operand 236 states and 479 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:10,829 INFO L93 Difference]: Finished difference Result 359 states and 711 transitions. [2021-06-05 20:41:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:41:10,830 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:10,830 INFO L225 Difference]: With dead ends: 359 [2021-06-05 20:41:10,830 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 20:41:10,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:41:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 20:41:10,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 238. [2021-06-05 20:41:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.037974683544304) internal successors, (483), 237 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 483 transitions. [2021-06-05 20:41:10,833 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 483 transitions. Word has length 21 [2021-06-05 20:41:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:10,833 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 483 transitions. [2021-06-05 20:41:10,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 483 transitions. [2021-06-05 20:41:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:10,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:10,833 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:11,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 20:41:11,033 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:11,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:11,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1213466597, now seen corresponding path program 313 times [2021-06-05 20:41:11,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:11,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082113773] [2021-06-05 20:41:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:11,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:11,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082113773] [2021-06-05 20:41:11,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082113773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:11,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734708918] [2021-06-05 20:41:11,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:11,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:11,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734708918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:11,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:11,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:11,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128300851] [2021-06-05 20:41:11,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:11,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:11,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:11,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:11,622 INFO L87 Difference]: Start difference. First operand 238 states and 483 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:12,290 INFO L93 Difference]: Finished difference Result 357 states and 709 transitions. [2021-06-05 20:41:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:41:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:12,290 INFO L225 Difference]: With dead ends: 357 [2021-06-05 20:41:12,291 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 20:41:12,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 811.1ms TimeCoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:41:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 20:41:12,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 240. [2021-06-05 20:41:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.0376569037656904) internal successors, (487), 239 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 487 transitions. [2021-06-05 20:41:12,293 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 487 transitions. Word has length 21 [2021-06-05 20:41:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:12,293 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 487 transitions. [2021-06-05 20:41:12,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 487 transitions. [2021-06-05 20:41:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:12,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:12,293 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:12,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 20:41:12,494 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:12,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1225818135, now seen corresponding path program 314 times [2021-06-05 20:41:12,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:12,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422237492] [2021-06-05 20:41:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:12,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:12,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422237492] [2021-06-05 20:41:12,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422237492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:12,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168391581] [2021-06-05 20:41:12,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:12,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:12,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:12,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:13,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168391581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:13,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:13,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:13,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89985163] [2021-06-05 20:41:13,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:13,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:13,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:13,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:13,058 INFO L87 Difference]: Start difference. First operand 240 states and 487 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:13,764 INFO L93 Difference]: Finished difference Result 366 states and 724 transitions. [2021-06-05 20:41:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:41:13,764 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:13,765 INFO L225 Difference]: With dead ends: 366 [2021-06-05 20:41:13,765 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 20:41:13,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 871.6ms TimeCoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:41:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 20:41:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 234. [2021-06-05 20:41:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.03862660944206) internal successors, (475), 233 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 475 transitions. [2021-06-05 20:41:13,767 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 475 transitions. Word has length 21 [2021-06-05 20:41:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:13,767 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 475 transitions. [2021-06-05 20:41:13,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 475 transitions. [2021-06-05 20:41:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:13,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:13,768 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:13,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 20:41:13,968 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:13,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:13,969 INFO L82 PathProgramCache]: Analyzing trace with hash -980040403, now seen corresponding path program 315 times [2021-06-05 20:41:13,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:13,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892958112] [2021-06-05 20:41:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:14,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:14,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892958112] [2021-06-05 20:41:14,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892958112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:14,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837259950] [2021-06-05 20:41:14,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:14,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:41:14,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:14,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:14,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837259950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:14,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:14,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:14,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034056183] [2021-06-05 20:41:14,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:14,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:14,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:14,548 INFO L87 Difference]: Start difference. First operand 234 states and 475 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:15,223 INFO L93 Difference]: Finished difference Result 361 states and 715 transitions. [2021-06-05 20:41:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:41:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:15,224 INFO L225 Difference]: With dead ends: 361 [2021-06-05 20:41:15,224 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 20:41:15,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 813.5ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:41:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 20:41:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 238. [2021-06-05 20:41:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.042194092827004) internal successors, (484), 237 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 484 transitions. [2021-06-05 20:41:15,227 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 484 transitions. Word has length 21 [2021-06-05 20:41:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:15,227 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 484 transitions. [2021-06-05 20:41:15,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 484 transitions. [2021-06-05 20:41:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:15,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:15,227 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:15,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:15,428 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:15,428 INFO L82 PathProgramCache]: Analyzing trace with hash -87865697, now seen corresponding path program 316 times [2021-06-05 20:41:15,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:15,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409772717] [2021-06-05 20:41:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:15,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:15,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409772717] [2021-06-05 20:41:15,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409772717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:15,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551671460] [2021-06-05 20:41:15,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:15,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:41:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:15,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:16,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551671460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:16,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:16,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:16,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257108520] [2021-06-05 20:41:16,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:16,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:16,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:16,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:16,015 INFO L87 Difference]: Start difference. First operand 238 states and 484 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:16,716 INFO L93 Difference]: Finished difference Result 364 states and 720 transitions. [2021-06-05 20:41:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:41:16,716 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:16,717 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:41:16,717 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:41:16,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 823.3ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:41:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:41:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 240. [2021-06-05 20:41:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.0418410041841004) internal successors, (488), 239 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 488 transitions. [2021-06-05 20:41:16,719 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 488 transitions. Word has length 21 [2021-06-05 20:41:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:16,719 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 488 transitions. [2021-06-05 20:41:16,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 488 transitions. [2021-06-05 20:41:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:16,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:16,720 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:16,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 20:41:16,920 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:16,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1943548261, now seen corresponding path program 317 times [2021-06-05 20:41:16,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:16,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619274012] [2021-06-05 20:41:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:17,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:17,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619274012] [2021-06-05 20:41:17,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619274012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:17,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575374048] [2021-06-05 20:41:17,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:17,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:17,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:17,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:17,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:17,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575374048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:17,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:17,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:17,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280826612] [2021-06-05 20:41:17,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:17,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:17,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:17,496 INFO L87 Difference]: Start difference. First operand 240 states and 488 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:18,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:18,562 INFO L93 Difference]: Finished difference Result 374 states and 736 transitions. [2021-06-05 20:41:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:41:18,562 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:18,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:18,562 INFO L225 Difference]: With dead ends: 374 [2021-06-05 20:41:18,562 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:41:18,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1075.5ms TimeCoverageRelationStatistics Valid=388, Invalid=2692, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:41:18,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:41:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 236. [2021-06-05 20:41:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.0425531914893615) internal successors, (480), 235 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 480 transitions. [2021-06-05 20:41:18,565 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 480 transitions. Word has length 21 [2021-06-05 20:41:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:18,565 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 480 transitions. [2021-06-05 20:41:18,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 480 transitions. [2021-06-05 20:41:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:18,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:18,565 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:18,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:18,766 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash -328311845, now seen corresponding path program 318 times [2021-06-05 20:41:18,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:18,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904705691] [2021-06-05 20:41:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:18,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:18,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904705691] [2021-06-05 20:41:18,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904705691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:18,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58635456] [2021-06-05 20:41:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:18,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:41:18,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:18,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:18,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:19,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58635456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:19,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:19,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:19,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49049315] [2021-06-05 20:41:19,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:19,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:19,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:19,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:19,349 INFO L87 Difference]: Start difference. First operand 236 states and 480 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:20,304 INFO L93 Difference]: Finished difference Result 358 states and 710 transitions. [2021-06-05 20:41:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:41:20,305 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:20,305 INFO L225 Difference]: With dead ends: 358 [2021-06-05 20:41:20,305 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 20:41:20,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 890.6ms TimeCoverageRelationStatistics Valid=314, Invalid=2236, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:41:20,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 20:41:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 240. [2021-06-05 20:41:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.0460251046025104) internal successors, (489), 239 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 489 transitions. [2021-06-05 20:41:20,308 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 489 transitions. Word has length 21 [2021-06-05 20:41:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:20,308 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 489 transitions. [2021-06-05 20:41:20,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 489 transitions. [2021-06-05 20:41:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:20,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:20,308 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:20,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:20,521 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2110972887, now seen corresponding path program 319 times [2021-06-05 20:41:20,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:20,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770559673] [2021-06-05 20:41:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:20,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:20,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770559673] [2021-06-05 20:41:20,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770559673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:20,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111996992] [2021-06-05 20:41:20,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:20,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:20,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:21,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111996992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:21,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:21,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:21,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425873501] [2021-06-05 20:41:21,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:21,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:21,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:21,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:21,096 INFO L87 Difference]: Start difference. First operand 240 states and 489 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:22,115 INFO L93 Difference]: Finished difference Result 367 states and 725 transitions. [2021-06-05 20:41:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:41:22,115 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:22,115 INFO L225 Difference]: With dead ends: 367 [2021-06-05 20:41:22,115 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 20:41:22,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 945.1ms TimeCoverageRelationStatistics Valid=348, Invalid=2408, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:41:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 20:41:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 238. [2021-06-05 20:41:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.0464135021097047) internal successors, (485), 237 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 485 transitions. [2021-06-05 20:41:22,118 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 485 transitions. Word has length 21 [2021-06-05 20:41:22,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:22,118 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 485 transitions. [2021-06-05 20:41:22,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 485 transitions. [2021-06-05 20:41:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:22,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:22,118 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:22,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:22,319 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1440275497, now seen corresponding path program 320 times [2021-06-05 20:41:22,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:22,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048998725] [2021-06-05 20:41:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:22,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:22,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048998725] [2021-06-05 20:41:22,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048998725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:22,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31659505] [2021-06-05 20:41:22,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:22,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:22,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:22,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:22,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:22,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31659505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:22,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:22,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:22,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032566451] [2021-06-05 20:41:22,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:22,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:22,900 INFO L87 Difference]: Start difference. First operand 238 states and 485 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:23,888 INFO L93 Difference]: Finished difference Result 390 states and 775 transitions. [2021-06-05 20:41:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:41:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:23,889 INFO L225 Difference]: With dead ends: 390 [2021-06-05 20:41:23,889 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 20:41:23,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1020.1ms TimeCoverageRelationStatistics Valid=386, Invalid=2584, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:41:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 20:41:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 235. [2021-06-05 20:41:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.034188034188034) internal successors, (476), 234 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 476 transitions. [2021-06-05 20:41:23,892 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 476 transitions. Word has length 21 [2021-06-05 20:41:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:23,892 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 476 transitions. [2021-06-05 20:41:23,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 476 transitions. [2021-06-05 20:41:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:23,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:23,892 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:24,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:24,093 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2006800515, now seen corresponding path program 321 times [2021-06-05 20:41:24,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:24,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250964914] [2021-06-05 20:41:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:24,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:24,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250964914] [2021-06-05 20:41:24,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250964914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:24,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060043763] [2021-06-05 20:41:24,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:24,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:41:24,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:24,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:24,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:24,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060043763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:24,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:24,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:24,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360517929] [2021-06-05 20:41:24,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:24,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:24,692 INFO L87 Difference]: Start difference. First operand 235 states and 476 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:25,612 INFO L93 Difference]: Finished difference Result 356 states and 711 transitions. [2021-06-05 20:41:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:41:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:25,613 INFO L225 Difference]: With dead ends: 356 [2021-06-05 20:41:25,613 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 20:41:25,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 908.3ms TimeCoverageRelationStatistics Valid=316, Invalid=2234, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:41:25,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 20:41:25,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 236. [2021-06-05 20:41:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.0340425531914894) internal successors, (478), 235 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:25,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 478 transitions. [2021-06-05 20:41:25,615 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 478 transitions. Word has length 21 [2021-06-05 20:41:25,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:25,615 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 478 transitions. [2021-06-05 20:41:25,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 478 transitions. [2021-06-05 20:41:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:25,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:25,616 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:25,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:25,816 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:25,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1370216591, now seen corresponding path program 322 times [2021-06-05 20:41:25,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:25,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557374789] [2021-06-05 20:41:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:25,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:25,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557374789] [2021-06-05 20:41:25,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557374789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:25,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184256795] [2021-06-05 20:41:25,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:26,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:41:26,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:26,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:26,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:26,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184256795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:26,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:26,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:26,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169331302] [2021-06-05 20:41:26,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:26,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:26,406 INFO L87 Difference]: Start difference. First operand 236 states and 478 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:27,404 INFO L93 Difference]: Finished difference Result 360 states and 719 transitions. [2021-06-05 20:41:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:41:27,404 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:27,404 INFO L225 Difference]: With dead ends: 360 [2021-06-05 20:41:27,404 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 20:41:27,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 983.7ms TimeCoverageRelationStatistics Valid=370, Invalid=2492, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:41:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 20:41:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 232. [2021-06-05 20:41:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.034632034632035) internal successors, (470), 231 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 470 transitions. [2021-06-05 20:41:27,407 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 470 transitions. Word has length 21 [2021-06-05 20:41:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:27,407 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 470 transitions. [2021-06-05 20:41:27,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 470 transitions. [2021-06-05 20:41:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:27,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:27,407 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:27,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 20:41:27,608 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1182084849, now seen corresponding path program 323 times [2021-06-05 20:41:27,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:27,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949019133] [2021-06-05 20:41:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:27,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:27,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949019133] [2021-06-05 20:41:27,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949019133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:27,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870737908] [2021-06-05 20:41:27,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:27,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:27,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:27,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:28,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870737908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:28,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:28,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:28,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353392413] [2021-06-05 20:41:28,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:28,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:28,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:28,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:28,195 INFO L87 Difference]: Start difference. First operand 232 states and 470 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:28,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:28,904 INFO L93 Difference]: Finished difference Result 337 states and 669 transitions. [2021-06-05 20:41:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:41:28,904 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:28,905 INFO L225 Difference]: With dead ends: 337 [2021-06-05 20:41:28,905 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 20:41:28,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 798.8ms TimeCoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:41:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 20:41:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 237. [2021-06-05 20:41:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.038135593220339) internal successors, (481), 236 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 481 transitions. [2021-06-05 20:41:28,907 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 481 transitions. Word has length 21 [2021-06-05 20:41:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:28,907 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 481 transitions. [2021-06-05 20:41:28,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 481 transitions. [2021-06-05 20:41:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:28,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:28,908 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:29,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:29,108 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:29,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:29,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2074259555, now seen corresponding path program 324 times [2021-06-05 20:41:29,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:29,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221853324] [2021-06-05 20:41:29,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:29,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:29,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221853324] [2021-06-05 20:41:29,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221853324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:29,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358685182] [2021-06-05 20:41:29,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:29,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:41:29,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:29,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:29,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:29,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358685182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:29,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:29,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:29,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159593325] [2021-06-05 20:41:29,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:29,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:29,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:29,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:29,695 INFO L87 Difference]: Start difference. First operand 237 states and 481 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:30,344 INFO L93 Difference]: Finished difference Result 340 states and 674 transitions. [2021-06-05 20:41:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:41:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:30,345 INFO L225 Difference]: With dead ends: 340 [2021-06-05 20:41:30,345 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 20:41:30,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 800.7ms TimeCoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:41:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 20:41:30,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 239. [2021-06-05 20:41:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.03781512605042) internal successors, (485), 238 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 485 transitions. [2021-06-05 20:41:30,347 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 485 transitions. Word has length 21 [2021-06-05 20:41:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:30,347 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 485 transitions. [2021-06-05 20:41:30,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 485 transitions. [2021-06-05 20:41:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:30,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:30,348 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:30,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 20:41:30,548 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash 218576991, now seen corresponding path program 325 times [2021-06-05 20:41:30,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:30,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764642980] [2021-06-05 20:41:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:30,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:30,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764642980] [2021-06-05 20:41:30,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764642980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:30,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573621299] [2021-06-05 20:41:30,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:30,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:30,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:31,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573621299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:31,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:31,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:31,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620039841] [2021-06-05 20:41:31,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:31,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:31,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:31,127 INFO L87 Difference]: Start difference. First operand 239 states and 485 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:32,154 INFO L93 Difference]: Finished difference Result 357 states and 700 transitions. [2021-06-05 20:41:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:41:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:32,155 INFO L225 Difference]: With dead ends: 357 [2021-06-05 20:41:32,155 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 20:41:32,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1008.6ms TimeCoverageRelationStatistics Valid=355, Invalid=2507, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:41:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 20:41:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 243. [2021-06-05 20:41:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.0454545454545454) internal successors, (495), 242 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 495 transitions. [2021-06-05 20:41:32,157 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 495 transitions. Word has length 21 [2021-06-05 20:41:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:32,157 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 495 transitions. [2021-06-05 20:41:32,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 495 transitions. [2021-06-05 20:41:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:32,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:32,158 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:32,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 20:41:32,358 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:32,359 INFO L82 PathProgramCache]: Analyzing trace with hash 211254171, now seen corresponding path program 326 times [2021-06-05 20:41:32,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:32,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4741603] [2021-06-05 20:41:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:32,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:32,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4741603] [2021-06-05 20:41:32,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4741603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:32,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90132512] [2021-06-05 20:41:32,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:32,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:32,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:32,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:32,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90132512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:32,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:32,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:32,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418214590] [2021-06-05 20:41:32,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:32,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:32,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:32,934 INFO L87 Difference]: Start difference. First operand 243 states and 495 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:34,016 INFO L93 Difference]: Finished difference Result 379 states and 747 transitions. [2021-06-05 20:41:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:41:34,016 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:34,017 INFO L225 Difference]: With dead ends: 379 [2021-06-05 20:41:34,017 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 20:41:34,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1056.6ms TimeCoverageRelationStatistics Valid=428, Invalid=2878, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:41:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 20:41:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 238. [2021-06-05 20:41:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.042194092827004) internal successors, (484), 237 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 484 transitions. [2021-06-05 20:41:34,020 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 484 transitions. Word has length 21 [2021-06-05 20:41:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:34,020 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 484 transitions. [2021-06-05 20:41:34,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 484 transitions. [2021-06-05 20:41:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:34,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:34,020 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:34,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 20:41:34,220 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1833813407, now seen corresponding path program 327 times [2021-06-05 20:41:34,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:34,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139643687] [2021-06-05 20:41:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:34,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:34,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139643687] [2021-06-05 20:41:34,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139643687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:34,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854294087] [2021-06-05 20:41:34,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:34,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:41:34,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:34,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:34,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:34,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854294087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:34,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:34,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:34,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459091043] [2021-06-05 20:41:34,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:34,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:34,828 INFO L87 Difference]: Start difference. First operand 238 states and 484 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:35,643 INFO L93 Difference]: Finished difference Result 349 states and 693 transitions. [2021-06-05 20:41:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:41:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:35,644 INFO L225 Difference]: With dead ends: 349 [2021-06-05 20:41:35,644 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 20:41:35,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 902.1ms TimeCoverageRelationStatistics Valid=300, Invalid=2150, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:41:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 20:41:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 242. [2021-06-05 20:41:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.045643153526971) internal successors, (493), 241 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 493 transitions. [2021-06-05 20:41:35,647 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 493 transitions. Word has length 21 [2021-06-05 20:41:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:35,647 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 493 transitions. [2021-06-05 20:41:35,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 493 transitions. [2021-06-05 20:41:35,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:35,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:35,647 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:35,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:35,847 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:35,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:35,848 INFO L82 PathProgramCache]: Analyzing trace with hash -21869157, now seen corresponding path program 328 times [2021-06-05 20:41:35,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:35,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916471481] [2021-06-05 20:41:35,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:36,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:36,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916471481] [2021-06-05 20:41:36,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916471481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:36,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622865863] [2021-06-05 20:41:36,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:36,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:41:36,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:36,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:36,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:36,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622865863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:36,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:36,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:36,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115308897] [2021-06-05 20:41:36,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:36,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:36,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:36,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:36,436 INFO L87 Difference]: Start difference. First operand 242 states and 493 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:37,421 INFO L93 Difference]: Finished difference Result 371 states and 723 transitions. [2021-06-05 20:41:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:41:37,422 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:37,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:37,422 INFO L225 Difference]: With dead ends: 371 [2021-06-05 20:41:37,422 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:41:37,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 933.9ms TimeCoverageRelationStatistics Valid=334, Invalid=2318, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:41:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:41:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 251. [2021-06-05 20:41:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.056) internal successors, (514), 250 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 514 transitions. [2021-06-05 20:41:37,425 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 514 transitions. Word has length 21 [2021-06-05 20:41:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:37,425 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 514 transitions. [2021-06-05 20:41:37,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:37,425 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 514 transitions. [2021-06-05 20:41:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:37,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:37,425 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:37,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:37,626 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash -29191977, now seen corresponding path program 329 times [2021-06-05 20:41:37,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:37,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117282602] [2021-06-05 20:41:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:37,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117282602] [2021-06-05 20:41:37,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117282602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121315868] [2021-06-05 20:41:37,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:37,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:37,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:37,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:38,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121315868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:38,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:38,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:38,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584062211] [2021-06-05 20:41:38,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:38,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:38,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:38,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:38,214 INFO L87 Difference]: Start difference. First operand 251 states and 514 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:39,146 INFO L93 Difference]: Finished difference Result 389 states and 768 transitions. [2021-06-05 20:41:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:41:39,146 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:39,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:39,147 INFO L225 Difference]: With dead ends: 389 [2021-06-05 20:41:39,147 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 20:41:39,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 993.8ms TimeCoverageRelationStatistics Valid=412, Invalid=2668, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:41:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 20:41:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 248. [2021-06-05 20:41:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.0526315789473686) internal successors, (507), 247 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 507 transitions. [2021-06-05 20:41:39,149 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 507 transitions. Word has length 21 [2021-06-05 20:41:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:39,150 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 507 transitions. [2021-06-05 20:41:39,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 507 transitions. [2021-06-05 20:41:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:39,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:39,150 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:39,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:39,357 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash 721849755, now seen corresponding path program 330 times [2021-06-05 20:41:39,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:39,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684122671] [2021-06-05 20:41:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:39,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:39,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684122671] [2021-06-05 20:41:39,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684122671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:39,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964172094] [2021-06-05 20:41:39,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:39,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:41:39,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:39,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:39,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:39,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964172094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:39,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:39,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:39,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538784317] [2021-06-05 20:41:39,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:39,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:39,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:39,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:39,967 INFO L87 Difference]: Start difference. First operand 248 states and 507 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:40,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:40,967 INFO L93 Difference]: Finished difference Result 397 states and 782 transitions. [2021-06-05 20:41:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:41:40,968 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:40,968 INFO L225 Difference]: With dead ends: 397 [2021-06-05 20:41:40,968 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 20:41:40,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1013.6ms TimeCoverageRelationStatistics Valid=378, Invalid=2484, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:41:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 20:41:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 254. [2021-06-05 20:41:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.0711462450592886) internal successors, (524), 253 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 524 transitions. [2021-06-05 20:41:40,973 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 524 transitions. Word has length 21 [2021-06-05 20:41:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:40,973 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 524 transitions. [2021-06-05 20:41:40,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 524 transitions. [2021-06-05 20:41:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:40,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:40,973 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:41,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:41,177 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:41,177 INFO L82 PathProgramCache]: Analyzing trace with hash 714526935, now seen corresponding path program 331 times [2021-06-05 20:41:41,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:41,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926797521] [2021-06-05 20:41:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:41,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:41,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926797521] [2021-06-05 20:41:41,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926797521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:41,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001484954] [2021-06-05 20:41:41,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:41,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:41,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:41,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001484954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:41,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:41,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:41,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666702901] [2021-06-05 20:41:41,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:41,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:41,765 INFO L87 Difference]: Start difference. First operand 254 states and 524 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:42,998 INFO L93 Difference]: Finished difference Result 435 states and 854 transitions. [2021-06-05 20:41:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:41:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:42,998 INFO L225 Difference]: With dead ends: 435 [2021-06-05 20:41:42,999 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 20:41:42,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1148.1ms TimeCoverageRelationStatistics Valid=515, Invalid=3145, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:41:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 20:41:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 252. [2021-06-05 20:41:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.0756972111553784) internal successors, (521), 251 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 521 transitions. [2021-06-05 20:41:43,001 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 521 transitions. Word has length 21 [2021-06-05 20:41:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:43,002 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 521 transitions. [2021-06-05 20:41:43,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 521 transitions. [2021-06-05 20:41:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:43,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:43,002 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:43,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-05 20:41:43,203 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:43,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1469151017, now seen corresponding path program 332 times [2021-06-05 20:41:43,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:43,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786887122] [2021-06-05 20:41:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:43,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:43,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786887122] [2021-06-05 20:41:43,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786887122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:43,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398721457] [2021-06-05 20:41:43,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:43,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:43,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:43,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:43,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:43,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398721457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:43,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:43,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:43,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237986007] [2021-06-05 20:41:43,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:43,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:43,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:43,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:43,794 INFO L87 Difference]: Start difference. First operand 252 states and 521 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:44,953 INFO L93 Difference]: Finished difference Result 418 states and 832 transitions. [2021-06-05 20:41:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:41:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:44,954 INFO L225 Difference]: With dead ends: 418 [2021-06-05 20:41:44,954 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 20:41:44,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1084.4ms TimeCoverageRelationStatistics Valid=468, Invalid=2838, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:41:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 20:41:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 244. [2021-06-05 20:41:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.037037037037037) internal successors, (495), 243 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 495 transitions. [2021-06-05 20:41:44,957 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 495 transitions. Word has length 21 [2021-06-05 20:41:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:44,957 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 495 transitions. [2021-06-05 20:41:44,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 495 transitions. [2021-06-05 20:41:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:44,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:44,957 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:45,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:45,158 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:45,158 INFO L82 PathProgramCache]: Analyzing trace with hash 598223877, now seen corresponding path program 333 times [2021-06-05 20:41:45,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:45,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607266001] [2021-06-05 20:41:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:45,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607266001] [2021-06-05 20:41:45,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607266001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749141420] [2021-06-05 20:41:45,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:45,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:41:45,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:45,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:45,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:45,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749141420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:45,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:45,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:45,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143650541] [2021-06-05 20:41:45,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:45,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:45,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:45,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:45,766 INFO L87 Difference]: Start difference. First operand 244 states and 495 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:46,680 INFO L93 Difference]: Finished difference Result 370 states and 736 transitions. [2021-06-05 20:41:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:41:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:46,681 INFO L225 Difference]: With dead ends: 370 [2021-06-05 20:41:46,681 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 20:41:46,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:41:46,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 20:41:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 249. [2021-06-05 20:41:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.056451612903226) internal successors, (510), 248 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 510 transitions. [2021-06-05 20:41:46,683 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 510 transitions. Word has length 21 [2021-06-05 20:41:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:46,683 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 510 transitions. [2021-06-05 20:41:46,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:46,683 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 510 transitions. [2021-06-05 20:41:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:46,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:46,684 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:46,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:46,893 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash 590901057, now seen corresponding path program 334 times [2021-06-05 20:41:46,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:46,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881033206] [2021-06-05 20:41:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:47,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:47,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881033206] [2021-06-05 20:41:47,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881033206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:47,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637894046] [2021-06-05 20:41:47,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:47,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:41:47,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:47,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:47,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637894046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:47,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:47,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:47,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076649479] [2021-06-05 20:41:47,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:47,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:47,489 INFO L87 Difference]: Start difference. First operand 249 states and 510 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:48,670 INFO L93 Difference]: Finished difference Result 401 states and 796 transitions. [2021-06-05 20:41:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:41:48,670 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:48,671 INFO L225 Difference]: With dead ends: 401 [2021-06-05 20:41:48,671 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 20:41:48,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1120.0ms TimeCoverageRelationStatistics Valid=489, Invalid=2933, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:41:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 20:41:48,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 250. [2021-06-05 20:41:48,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.0602409638554215) internal successors, (513), 249 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 513 transitions. [2021-06-05 20:41:48,673 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 513 transitions. Word has length 21 [2021-06-05 20:41:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:48,673 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 513 transitions. [2021-06-05 20:41:48,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 513 transitions. [2021-06-05 20:41:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:48,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:48,674 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:48,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 20:41:48,874 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1592776895, now seen corresponding path program 335 times [2021-06-05 20:41:48,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:48,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706685983] [2021-06-05 20:41:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:49,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:49,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706685983] [2021-06-05 20:41:49,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706685983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15917818] [2021-06-05 20:41:49,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:49,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:41:49,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:49,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:49,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15917818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:49,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:49,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:49,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47775686] [2021-06-05 20:41:49,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:49,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:49,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:49,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:49,463 INFO L87 Difference]: Start difference. First operand 250 states and 513 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:50,662 INFO L93 Difference]: Finished difference Result 408 states and 813 transitions. [2021-06-05 20:41:50,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:41:50,663 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:50,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:50,663 INFO L225 Difference]: With dead ends: 408 [2021-06-05 20:41:50,663 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 20:41:50,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1112.5ms TimeCoverageRelationStatistics Valid=479, Invalid=2943, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:41:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 20:41:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 246. [2021-06-05 20:41:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.036734693877551) internal successors, (499), 245 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 499 transitions. [2021-06-05 20:41:50,666 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 499 transitions. Word has length 21 [2021-06-05 20:41:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:50,666 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 499 transitions. [2021-06-05 20:41:50,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 499 transitions. [2021-06-05 20:41:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:50,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:50,666 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:50,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 20:41:50,867 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash -319726313, now seen corresponding path program 336 times [2021-06-05 20:41:50,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:50,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247217634] [2021-06-05 20:41:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:51,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:51,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247217634] [2021-06-05 20:41:51,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247217634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:51,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616031466] [2021-06-05 20:41:51,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:51,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:41:51,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:51,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:51,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:51,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616031466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:51,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:51,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:51,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475710901] [2021-06-05 20:41:51,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:51,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:51,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:51,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:51,457 INFO L87 Difference]: Start difference. First operand 246 states and 499 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:52,410 INFO L93 Difference]: Finished difference Result 375 states and 746 transitions. [2021-06-05 20:41:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:41:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:52,410 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:41:52,410 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 20:41:52,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 988.5ms TimeCoverageRelationStatistics Valid=382, Invalid=2480, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:41:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 20:41:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 252. [2021-06-05 20:41:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.055776892430279) internal successors, (516), 251 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 516 transitions. [2021-06-05 20:41:52,413 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 516 transitions. Word has length 21 [2021-06-05 20:41:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:52,413 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 516 transitions. [2021-06-05 20:41:52,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 516 transitions. [2021-06-05 20:41:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:52,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:52,413 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:52,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 20:41:52,614 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash -327049133, now seen corresponding path program 337 times [2021-06-05 20:41:52,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:52,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045356729] [2021-06-05 20:41:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:52,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:52,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045356729] [2021-06-05 20:41:52,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045356729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:52,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811222270] [2021-06-05 20:41:52,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:52,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:52,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:53,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811222270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:53,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:53,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:53,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052988358] [2021-06-05 20:41:53,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:53,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:53,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:53,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:53,199 INFO L87 Difference]: Start difference. First operand 252 states and 516 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:54,488 INFO L93 Difference]: Finished difference Result 409 states and 812 transitions. [2021-06-05 20:41:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:41:54,489 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:54,489 INFO L225 Difference]: With dead ends: 409 [2021-06-05 20:41:54,489 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 20:41:54,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1136.1ms TimeCoverageRelationStatistics Valid=521, Invalid=3139, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:41:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 20:41:54,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 250. [2021-06-05 20:41:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.0602409638554215) internal successors, (513), 249 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 513 transitions. [2021-06-05 20:41:54,492 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 513 transitions. Word has length 21 [2021-06-05 20:41:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:54,492 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 513 transitions. [2021-06-05 20:41:54,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 513 transitions. [2021-06-05 20:41:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:54,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:54,492 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:54,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:54,693 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:54,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1784240211, now seen corresponding path program 338 times [2021-06-05 20:41:54,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:54,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520422671] [2021-06-05 20:41:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:54,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:54,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520422671] [2021-06-05 20:41:54,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520422671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:54,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174610568] [2021-06-05 20:41:54,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:54,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:54,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:54,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:54,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:55,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174610568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:55,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:55,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:55,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772516696] [2021-06-05 20:41:55,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:55,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:55,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:55,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:55,281 INFO L87 Difference]: Start difference. First operand 250 states and 513 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:56,384 INFO L93 Difference]: Finished difference Result 411 states and 819 transitions. [2021-06-05 20:41:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:41:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:56,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:56,385 INFO L225 Difference]: With dead ends: 411 [2021-06-05 20:41:56,385 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 20:41:56,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1064.3ms TimeCoverageRelationStatistics Valid=478, Invalid=2828, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:41:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 20:41:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 240. [2021-06-05 20:41:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.0376569037656904) internal successors, (487), 239 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 487 transitions. [2021-06-05 20:41:56,388 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 487 transitions. Word has length 21 [2021-06-05 20:41:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:56,388 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 487 transitions. [2021-06-05 20:41:56,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 487 transitions. [2021-06-05 20:41:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:56,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:56,388 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:56,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2021-06-05 20:41:56,589 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1927264357, now seen corresponding path program 339 times [2021-06-05 20:41:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:56,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789376713] [2021-06-05 20:41:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:56,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:56,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789376713] [2021-06-05 20:41:56,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789376713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:56,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478154107] [2021-06-05 20:41:56,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:56,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:41:56,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:56,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:57,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478154107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:57,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:57,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:57,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599142818] [2021-06-05 20:41:57,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:57,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:57,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:57,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:57,188 INFO L87 Difference]: Start difference. First operand 240 states and 487 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:57,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:57,898 INFO L93 Difference]: Finished difference Result 332 states and 660 transitions. [2021-06-05 20:41:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:41:57,898 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:57,899 INFO L225 Difference]: With dead ends: 332 [2021-06-05 20:41:57,899 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 20:41:57,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 807.1ms TimeCoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:41:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 20:41:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 236. [2021-06-05 20:41:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.0340425531914894) internal successors, (478), 235 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 478 transitions. [2021-06-05 20:41:57,901 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 478 transitions. Word has length 21 [2021-06-05 20:41:57,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:57,901 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 478 transitions. [2021-06-05 20:41:57,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 478 transitions. [2021-06-05 20:41:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:57,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:57,901 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:58,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:58,102 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash 638896023, now seen corresponding path program 340 times [2021-06-05 20:41:58,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:58,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658635105] [2021-06-05 20:41:58,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:58,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:58,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658635105] [2021-06-05 20:41:58,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658635105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:58,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021738433] [2021-06-05 20:41:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:58,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:41:58,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:58,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:58,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021738433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:58,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:58,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:41:58,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245068550] [2021-06-05 20:41:58,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:41:58,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:58,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:41:58,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:41:58,707 INFO L87 Difference]: Start difference. First operand 236 states and 478 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:59,561 INFO L93 Difference]: Finished difference Result 366 states and 728 transitions. [2021-06-05 20:41:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:41:59,561 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:41:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:59,562 INFO L225 Difference]: With dead ends: 366 [2021-06-05 20:41:59,562 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 20:41:59,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 884.6ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:41:59,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 20:41:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 242. [2021-06-05 20:41:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.0580912863070537) internal successors, (496), 241 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 496 transitions. [2021-06-05 20:41:59,564 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 496 transitions. Word has length 21 [2021-06-05 20:41:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:59,564 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 496 transitions. [2021-06-05 20:41:59,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 496 transitions. [2021-06-05 20:41:59,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:41:59,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:59,565 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:59,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:59,765 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:59,766 INFO L82 PathProgramCache]: Analyzing trace with hash 631573203, now seen corresponding path program 341 times [2021-06-05 20:41:59,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:59,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808362040] [2021-06-05 20:41:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:59,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:59,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808362040] [2021-06-05 20:41:59,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808362040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:59,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596416236] [2021-06-05 20:41:59,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:59,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:59,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:59,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:41:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:00,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596416236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:00,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:00,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:00,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693693462] [2021-06-05 20:42:00,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:00,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:00,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:00,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:00,357 INFO L87 Difference]: Start difference. First operand 242 states and 496 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:01,278 INFO L93 Difference]: Finished difference Result 400 states and 794 transitions. [2021-06-05 20:42:01,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:42:01,279 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:01,279 INFO L225 Difference]: With dead ends: 400 [2021-06-05 20:42:01,279 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 20:42:01,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=487, Invalid=2819, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:42:01,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 20:42:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 244. [2021-06-05 20:42:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.065843621399177) internal successors, (502), 243 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 502 transitions. [2021-06-05 20:42:01,282 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 502 transitions. Word has length 21 [2021-06-05 20:42:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:01,282 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 502 transitions. [2021-06-05 20:42:01,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 502 transitions. [2021-06-05 20:42:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:01,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:01,282 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:01,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:01,483 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:01,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1552104749, now seen corresponding path program 342 times [2021-06-05 20:42:01,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:01,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150712217] [2021-06-05 20:42:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:01,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150712217] [2021-06-05 20:42:01,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150712217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778109342] [2021-06-05 20:42:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:01,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:42:01,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:01,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:01,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:02,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778109342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:02,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:02,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:02,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725567605] [2021-06-05 20:42:02,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:02,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:02,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:02,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:02,070 INFO L87 Difference]: Start difference. First operand 244 states and 502 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:03,109 INFO L93 Difference]: Finished difference Result 422 states and 833 transitions. [2021-06-05 20:42:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:42:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:03,110 INFO L225 Difference]: With dead ends: 422 [2021-06-05 20:42:03,110 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 20:42:03,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1096.8ms TimeCoverageRelationStatistics Valid=522, Invalid=2900, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:42:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 20:42:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 240. [2021-06-05 20:42:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.0418410041841004) internal successors, (488), 239 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 488 transitions. [2021-06-05 20:42:03,112 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 488 transitions. Word has length 21 [2021-06-05 20:42:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:03,112 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 488 transitions. [2021-06-05 20:42:03,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 488 transitions. [2021-06-05 20:42:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:03,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:03,113 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:03,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:03,313 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1153168083, now seen corresponding path program 343 times [2021-06-05 20:42:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:03,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070611914] [2021-06-05 20:42:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:03,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070611914] [2021-06-05 20:42:03,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070611914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165105131] [2021-06-05 20:42:03,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:03,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:03,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:03,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165105131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:03,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:03,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:03,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006695282] [2021-06-05 20:42:03,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:03,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:03,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:03,915 INFO L87 Difference]: Start difference. First operand 240 states and 488 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:04,745 INFO L93 Difference]: Finished difference Result 362 states and 720 transitions. [2021-06-05 20:42:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:42:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:04,746 INFO L225 Difference]: With dead ends: 362 [2021-06-05 20:42:04,746 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 20:42:04,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 933.5ms TimeCoverageRelationStatistics Valid=404, Invalid=2248, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:42:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 20:42:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 239. [2021-06-05 20:42:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.03781512605042) internal successors, (485), 238 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 485 transitions. [2021-06-05 20:42:04,749 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 485 transitions. Word has length 21 [2021-06-05 20:42:04,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:04,749 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 485 transitions. [2021-06-05 20:42:04,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 485 transitions. [2021-06-05 20:42:04,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:04,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:04,749 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:04,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:04,949 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:04,950 INFO L82 PathProgramCache]: Analyzing trace with hash -974670711, now seen corresponding path program 344 times [2021-06-05 20:42:04,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:04,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012027189] [2021-06-05 20:42:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:05,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012027189] [2021-06-05 20:42:05,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012027189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209366258] [2021-06-05 20:42:05,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:05,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:05,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:05,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:05,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:05,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209366258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:05,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:05,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:05,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983421149] [2021-06-05 20:42:05,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:05,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:05,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:05,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:05,544 INFO L87 Difference]: Start difference. First operand 239 states and 485 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:06,439 INFO L93 Difference]: Finished difference Result 370 states and 736 transitions. [2021-06-05 20:42:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:42:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:06,440 INFO L225 Difference]: With dead ends: 370 [2021-06-05 20:42:06,440 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 20:42:06,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 891.3ms TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:42:06,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 20:42:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 244. [2021-06-05 20:42:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.05761316872428) internal successors, (500), 243 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 500 transitions. [2021-06-05 20:42:06,442 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 500 transitions. Word has length 21 [2021-06-05 20:42:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:06,442 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 500 transitions. [2021-06-05 20:42:06,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 500 transitions. [2021-06-05 20:42:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:06,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:06,443 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:06,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 20:42:06,643 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:06,643 INFO L82 PathProgramCache]: Analyzing trace with hash -981993531, now seen corresponding path program 345 times [2021-06-05 20:42:06,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:06,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877283622] [2021-06-05 20:42:06,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:06,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:06,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877283622] [2021-06-05 20:42:06,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877283622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:06,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210785945] [2021-06-05 20:42:06,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:06,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:42:06,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:06,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:06,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:07,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210785945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:07,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:07,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:07,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389960104] [2021-06-05 20:42:07,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:07,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:07,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:07,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:07,238 INFO L87 Difference]: Start difference. First operand 244 states and 500 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:08,212 INFO L93 Difference]: Finished difference Result 402 states and 798 transitions. [2021-06-05 20:42:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:42:08,213 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:08,213 INFO L225 Difference]: With dead ends: 402 [2021-06-05 20:42:08,213 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 20:42:08,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1078.9ms TimeCoverageRelationStatistics Valid=514, Invalid=2908, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:42:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 20:42:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 245. [2021-06-05 20:42:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.0614754098360657) internal successors, (503), 244 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 503 transitions. [2021-06-05 20:42:08,216 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 503 transitions. Word has length 21 [2021-06-05 20:42:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:08,216 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 503 transitions. [2021-06-05 20:42:08,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 503 transitions. [2021-06-05 20:42:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:08,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:08,216 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:08,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 20:42:08,417 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1129295813, now seen corresponding path program 346 times [2021-06-05 20:42:08,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:08,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029775912] [2021-06-05 20:42:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:08,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:08,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029775912] [2021-06-05 20:42:08,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029775912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355255144] [2021-06-05 20:42:08,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:08,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:42:08,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:08,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:08,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:09,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355255144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:09,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:09,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:09,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304997516] [2021-06-05 20:42:09,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:09,024 INFO L87 Difference]: Start difference. First operand 245 states and 503 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:10,209 INFO L93 Difference]: Finished difference Result 408 states and 813 transitions. [2021-06-05 20:42:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:42:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:10,210 INFO L225 Difference]: With dead ends: 408 [2021-06-05 20:42:10,210 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 20:42:10,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1132.9ms TimeCoverageRelationStatistics Valid=514, Invalid=2908, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:42:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 20:42:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 241. [2021-06-05 20:42:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.0375) internal successors, (489), 240 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 489 transitions. [2021-06-05 20:42:10,212 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 489 transitions. Word has length 21 [2021-06-05 20:42:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:10,213 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 489 transitions. [2021-06-05 20:42:10,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 489 transitions. [2021-06-05 20:42:10,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:10,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:10,213 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:10,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 20:42:10,413 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:10,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1892620901, now seen corresponding path program 347 times [2021-06-05 20:42:10,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:10,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108620048] [2021-06-05 20:42:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:10,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108620048] [2021-06-05 20:42:10,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108620048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764709185] [2021-06-05 20:42:10,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:10,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:10,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:10,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:10,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:11,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764709185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:11,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:11,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:11,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317448356] [2021-06-05 20:42:11,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:11,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:11,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:11,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:11,013 INFO L87 Difference]: Start difference. First operand 241 states and 489 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:11,964 INFO L93 Difference]: Finished difference Result 371 states and 738 transitions. [2021-06-05 20:42:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:42:11,965 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:11,965 INFO L225 Difference]: With dead ends: 371 [2021-06-05 20:42:11,965 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:42:11,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 959.8ms TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:42:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:42:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 247. [2021-06-05 20:42:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.0569105691056913) internal successors, (506), 246 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 506 transitions. [2021-06-05 20:42:11,968 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 506 transitions. Word has length 21 [2021-06-05 20:42:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:11,968 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 506 transitions. [2021-06-05 20:42:11,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 506 transitions. [2021-06-05 20:42:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:11,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:11,968 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:12,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 20:42:12,168 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1899943721, now seen corresponding path program 348 times [2021-06-05 20:42:12,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:12,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048020865] [2021-06-05 20:42:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:12,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:12,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048020865] [2021-06-05 20:42:12,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048020865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:12,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042434894] [2021-06-05 20:42:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:12,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:42:12,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:12,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:12,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:12,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042434894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:12,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:12,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:12,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848616126] [2021-06-05 20:42:12,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:12,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:12,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:12,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:12,776 INFO L87 Difference]: Start difference. First operand 247 states and 506 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:13,858 INFO L93 Difference]: Finished difference Result 410 states and 814 transitions. [2021-06-05 20:42:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:42:13,859 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:13,859 INFO L225 Difference]: With dead ends: 410 [2021-06-05 20:42:13,859 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 20:42:13,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1119.6ms TimeCoverageRelationStatistics Valid=554, Invalid=3106, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:42:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 20:42:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 245. [2021-06-05 20:42:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.0614754098360657) internal successors, (503), 244 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 503 transitions. [2021-06-05 20:42:13,862 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 503 transitions. Word has length 21 [2021-06-05 20:42:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:13,862 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 503 transitions. [2021-06-05 20:42:13,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 503 transitions. [2021-06-05 20:42:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:13,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:13,862 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:14,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 20:42:14,063 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:14,063 INFO L82 PathProgramCache]: Analyzing trace with hash 211345623, now seen corresponding path program 349 times [2021-06-05 20:42:14,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:14,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330696160] [2021-06-05 20:42:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:14,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:14,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330696160] [2021-06-05 20:42:14,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330696160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:14,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604002427] [2021-06-05 20:42:14,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:14,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:14,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604002427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:14,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:14,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:14,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341712979] [2021-06-05 20:42:14,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:14,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:14,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:14,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:14,653 INFO L87 Difference]: Start difference. First operand 245 states and 503 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:15,725 INFO L93 Difference]: Finished difference Result 402 states and 801 transitions. [2021-06-05 20:42:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:42:15,726 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:15,726 INFO L225 Difference]: With dead ends: 402 [2021-06-05 20:42:15,726 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 20:42:15,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1042.6ms TimeCoverageRelationStatistics Valid=499, Invalid=2693, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:42:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 20:42:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 234. [2021-06-05 20:42:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.03862660944206) internal successors, (475), 233 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 475 transitions. [2021-06-05 20:42:15,729 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 475 transitions. Word has length 21 [2021-06-05 20:42:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:15,729 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 475 transitions. [2021-06-05 20:42:15,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 475 transitions. [2021-06-05 20:42:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:15,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:15,729 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:15,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:15,930 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:15,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1772933337, now seen corresponding path program 350 times [2021-06-05 20:42:15,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:15,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763100683] [2021-06-05 20:42:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:16,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:16,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763100683] [2021-06-05 20:42:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763100683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:16,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147318570] [2021-06-05 20:42:16,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:16,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:16,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:16,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:16,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:16,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147318570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:16,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:16,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862647189] [2021-06-05 20:42:16,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:16,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:16,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:16,496 INFO L87 Difference]: Start difference. First operand 234 states and 475 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:17,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:17,106 INFO L93 Difference]: Finished difference Result 345 states and 684 transitions. [2021-06-05 20:42:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:42:17,107 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:17,107 INFO L225 Difference]: With dead ends: 345 [2021-06-05 20:42:17,107 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 20:42:17,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 782.0ms TimeCoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:42:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 20:42:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 234. [2021-06-05 20:42:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.03862660944206) internal successors, (475), 233 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 475 transitions. [2021-06-05 20:42:17,109 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 475 transitions. Word has length 21 [2021-06-05 20:42:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:17,110 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 475 transitions. [2021-06-05 20:42:17,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 475 transitions. [2021-06-05 20:42:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:17,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:17,110 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:17,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 20:42:17,310 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -630023725, now seen corresponding path program 351 times [2021-06-05 20:42:17,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:17,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193313734] [2021-06-05 20:42:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:17,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:17,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193313734] [2021-06-05 20:42:17,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193313734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:17,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931210583] [2021-06-05 20:42:17,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:17,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:42:17,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:17,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:17,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:17,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931210583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:17,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:17,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:17,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847572999] [2021-06-05 20:42:17,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:17,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:17,878 INFO L87 Difference]: Start difference. First operand 234 states and 475 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:18,625 INFO L93 Difference]: Finished difference Result 352 states and 695 transitions. [2021-06-05 20:42:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:42:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:18,626 INFO L225 Difference]: With dead ends: 352 [2021-06-05 20:42:18,626 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 20:42:18,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:42:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 20:42:18,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 236. [2021-06-05 20:42:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.0382978723404257) internal successors, (479), 235 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 479 transitions. [2021-06-05 20:42:18,628 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 479 transitions. Word has length 21 [2021-06-05 20:42:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:18,629 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 479 transitions. [2021-06-05 20:42:18,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 479 transitions. [2021-06-05 20:42:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:18,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:18,629 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:18,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:18,829 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash 262150981, now seen corresponding path program 352 times [2021-06-05 20:42:18,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:18,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597293620] [2021-06-05 20:42:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:19,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:19,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597293620] [2021-06-05 20:42:19,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597293620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:19,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144528467] [2021-06-05 20:42:19,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:19,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:42:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:19,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:19,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:19,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144528467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:19,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:19,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:19,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437853905] [2021-06-05 20:42:19,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:19,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:19,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:19,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:19,403 INFO L87 Difference]: Start difference. First operand 236 states and 479 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:20,100 INFO L93 Difference]: Finished difference Result 350 states and 693 transitions. [2021-06-05 20:42:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:42:20,101 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:20,101 INFO L225 Difference]: With dead ends: 350 [2021-06-05 20:42:20,101 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 20:42:20,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:42:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 20:42:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 238. [2021-06-05 20:42:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.037974683544304) internal successors, (483), 237 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 483 transitions. [2021-06-05 20:42:20,104 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 483 transitions. Word has length 21 [2021-06-05 20:42:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:20,104 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 483 transitions. [2021-06-05 20:42:20,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 483 transitions. [2021-06-05 20:42:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:20,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:20,104 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:20,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:20,304 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1593531583, now seen corresponding path program 353 times [2021-06-05 20:42:20,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:20,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775807829] [2021-06-05 20:42:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:20,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:20,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775807829] [2021-06-05 20:42:20,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775807829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:20,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016451597] [2021-06-05 20:42:20,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:20,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:20,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:20,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:20,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:20,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016451597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:20,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:20,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:20,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836606029] [2021-06-05 20:42:20,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:20,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:20,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:20,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:20,882 INFO L87 Difference]: Start difference. First operand 238 states and 483 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:21,703 INFO L93 Difference]: Finished difference Result 359 states and 708 transitions. [2021-06-05 20:42:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:42:21,704 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:21,704 INFO L225 Difference]: With dead ends: 359 [2021-06-05 20:42:21,704 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 20:42:21,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 901.0ms TimeCoverageRelationStatistics Valid=315, Invalid=2235, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:42:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 20:42:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 232. [2021-06-05 20:42:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.038961038961039) internal successors, (471), 231 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 471 transitions. [2021-06-05 20:42:21,707 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 471 transitions. Word has length 21 [2021-06-05 20:42:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:21,707 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 471 transitions. [2021-06-05 20:42:21,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:21,707 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 471 transitions. [2021-06-05 20:42:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:21,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:21,707 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:21,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-05 20:42:21,907 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:21,908 INFO L82 PathProgramCache]: Analyzing trace with hash 495577175, now seen corresponding path program 354 times [2021-06-05 20:42:21,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:21,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712864731] [2021-06-05 20:42:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:22,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712864731] [2021-06-05 20:42:22,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712864731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:22,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322465321] [2021-06-05 20:42:22,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:22,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:42:22,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:22,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:22,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:22,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322465321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:22,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:22,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:22,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036698904] [2021-06-05 20:42:22,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:22,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:22,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:22,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:22,488 INFO L87 Difference]: Start difference. First operand 232 states and 471 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:23,189 INFO L93 Difference]: Finished difference Result 362 states and 717 transitions. [2021-06-05 20:42:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:42:23,189 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:23,190 INFO L225 Difference]: With dead ends: 362 [2021-06-05 20:42:23,190 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 20:42:23,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 815.4ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:42:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 20:42:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 236. [2021-06-05 20:42:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.0425531914893615) internal successors, (480), 235 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 480 transitions. [2021-06-05 20:42:23,192 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 480 transitions. Word has length 21 [2021-06-05 20:42:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:23,192 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 480 transitions. [2021-06-05 20:42:23,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 480 transitions. [2021-06-05 20:42:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:23,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:23,193 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:23,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:23,393 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:23,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1387751881, now seen corresponding path program 355 times [2021-06-05 20:42:23,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:23,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374064892] [2021-06-05 20:42:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:23,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374064892] [2021-06-05 20:42:23,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374064892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985756086] [2021-06-05 20:42:23,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:23,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:23,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:24,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985756086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:24,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:24,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:24,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136105026] [2021-06-05 20:42:24,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:24,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:24,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:24,021 INFO L87 Difference]: Start difference. First operand 236 states and 480 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:24,707 INFO L93 Difference]: Finished difference Result 365 states and 722 transitions. [2021-06-05 20:42:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:42:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:24,708 INFO L225 Difference]: With dead ends: 365 [2021-06-05 20:42:24,708 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 20:42:24,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:42:24,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 20:42:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2021-06-05 20:42:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.042194092827004) internal successors, (484), 237 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 484 transitions. [2021-06-05 20:42:24,710 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 484 transitions. Word has length 21 [2021-06-05 20:42:24,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:24,710 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 484 transitions. [2021-06-05 20:42:24,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 484 transitions. [2021-06-05 20:42:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:24,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:24,711 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:24,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 20:42:24,911 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:24,911 INFO L82 PathProgramCache]: Analyzing trace with hash -467930683, now seen corresponding path program 356 times [2021-06-05 20:42:24,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:24,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046582193] [2021-06-05 20:42:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:25,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:25,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046582193] [2021-06-05 20:42:25,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046582193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:25,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298237364] [2021-06-05 20:42:25,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:25,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:25,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:25,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:25,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:25,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298237364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:25,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:25,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:25,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261741643] [2021-06-05 20:42:25,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:25,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:25,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:25,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:25,487 INFO L87 Difference]: Start difference. First operand 238 states and 484 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:26,556 INFO L93 Difference]: Finished difference Result 375 states and 738 transitions. [2021-06-05 20:42:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:42:26,556 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:26,557 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:42:26,557 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 20:42:26,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1092.4ms TimeCoverageRelationStatistics Valid=405, Invalid=2787, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:42:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 20:42:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 234. [2021-06-05 20:42:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.0429184549356223) internal successors, (476), 233 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 476 transitions. [2021-06-05 20:42:26,559 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 476 transitions. Word has length 21 [2021-06-05 20:42:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:26,559 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 476 transitions. [2021-06-05 20:42:26,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 476 transitions. [2021-06-05 20:42:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:26,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:26,560 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:26,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:26,760 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1147305733, now seen corresponding path program 357 times [2021-06-05 20:42:26,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:26,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707908706] [2021-06-05 20:42:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:26,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:26,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707908706] [2021-06-05 20:42:26,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707908706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:26,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585915351] [2021-06-05 20:42:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:26,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:42:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:26,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:27,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585915351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:27,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:27,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:27,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552162148] [2021-06-05 20:42:27,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:27,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:27,344 INFO L87 Difference]: Start difference. First operand 234 states and 476 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:28,248 INFO L93 Difference]: Finished difference Result 360 states and 714 transitions. [2021-06-05 20:42:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:42:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:28,248 INFO L225 Difference]: With dead ends: 360 [2021-06-05 20:42:28,249 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 20:42:28,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 893.0ms TimeCoverageRelationStatistics Valid=314, Invalid=2236, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:42:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 20:42:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 238. [2021-06-05 20:42:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.0464135021097047) internal successors, (485), 237 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 485 transitions. [2021-06-05 20:42:28,251 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 485 transitions. Word has length 21 [2021-06-05 20:42:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:28,251 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 485 transitions. [2021-06-05 20:42:28,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 485 transitions. [2021-06-05 20:42:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:28,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:28,251 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:28,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 20:42:28,452 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash -708376831, now seen corresponding path program 358 times [2021-06-05 20:42:28,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:28,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678836339] [2021-06-05 20:42:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:28,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:28,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678836339] [2021-06-05 20:42:28,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678836339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:28,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242468391] [2021-06-05 20:42:28,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:28,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:42:28,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:28,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:28,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:29,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242468391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:29,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:29,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:29,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078226050] [2021-06-05 20:42:29,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:29,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:29,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:29,030 INFO L87 Difference]: Start difference. First operand 238 states and 485 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:30,004 INFO L93 Difference]: Finished difference Result 368 states and 727 transitions. [2021-06-05 20:42:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:42:30,005 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:30,005 INFO L225 Difference]: With dead ends: 368 [2021-06-05 20:42:30,005 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 20:42:30,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 966.0ms TimeCoverageRelationStatistics Valid=365, Invalid=2497, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:42:30,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 20:42:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 236. [2021-06-05 20:42:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.046808510638298) internal successors, (481), 235 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 481 transitions. [2021-06-05 20:42:30,008 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 481 transitions. Word has length 21 [2021-06-05 20:42:30,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:30,008 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 481 transitions. [2021-06-05 20:42:30,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 481 transitions. [2021-06-05 20:42:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:30,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:30,008 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:30,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 20:42:30,209 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:30,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:30,209 INFO L82 PathProgramCache]: Analyzing trace with hash 35342081, now seen corresponding path program 359 times [2021-06-05 20:42:30,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:30,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136353721] [2021-06-05 20:42:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:30,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:30,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136353721] [2021-06-05 20:42:30,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136353721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:30,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691178693] [2021-06-05 20:42:30,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:30,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:30,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:30,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691178693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:30,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:30,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:30,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715780176] [2021-06-05 20:42:30,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:30,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:30,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:30,790 INFO L87 Difference]: Start difference. First operand 236 states and 481 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:32,114 INFO L93 Difference]: Finished difference Result 394 states and 782 transitions. [2021-06-05 20:42:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:42:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:32,114 INFO L225 Difference]: With dead ends: 394 [2021-06-05 20:42:32,114 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 20:42:32,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1070.6ms TimeCoverageRelationStatistics Valid=419, Invalid=2773, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:42:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 20:42:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 233. [2021-06-05 20:42:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0344827586206895) internal successors, (472), 232 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 472 transitions. [2021-06-05 20:42:32,117 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 472 transitions. Word has length 21 [2021-06-05 20:42:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:32,117 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 472 transitions. [2021-06-05 20:42:32,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 472 transitions. [2021-06-05 20:42:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:32,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:32,117 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:32,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:32,318 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash -531182937, now seen corresponding path program 360 times [2021-06-05 20:42:32,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:32,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294376873] [2021-06-05 20:42:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:32,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:32,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294376873] [2021-06-05 20:42:32,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294376873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:32,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096036610] [2021-06-05 20:42:32,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:32,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:42:32,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:32,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:32,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:32,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096036610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:32,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:32,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:32,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108824104] [2021-06-05 20:42:32,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:32,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:32,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:32,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:32,902 INFO L87 Difference]: Start difference. First operand 233 states and 472 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:33,866 INFO L93 Difference]: Finished difference Result 358 states and 715 transitions. [2021-06-05 20:42:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:42:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:33,867 INFO L225 Difference]: With dead ends: 358 [2021-06-05 20:42:33,867 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 20:42:33,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 946.0ms TimeCoverageRelationStatistics Valid=353, Invalid=2403, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:42:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 20:42:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 234. [2021-06-05 20:42:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.0343347639484977) internal successors, (474), 233 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 474 transitions. [2021-06-05 20:42:33,869 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 474 transitions. Word has length 21 [2021-06-05 20:42:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:33,869 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 474 transitions. [2021-06-05 20:42:33,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 474 transitions. [2021-06-05 20:42:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:33,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:33,870 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:34,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 20:42:34,070 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:34,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1449133127, now seen corresponding path program 361 times [2021-06-05 20:42:34,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:34,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894013436] [2021-06-05 20:42:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:34,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:34,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894013436] [2021-06-05 20:42:34,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894013436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:34,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382962208] [2021-06-05 20:42:34,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:34,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:34,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382962208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:34,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:34,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985447746] [2021-06-05 20:42:34,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:34,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:34,657 INFO L87 Difference]: Start difference. First operand 234 states and 474 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:35,701 INFO L93 Difference]: Finished difference Result 364 states and 726 transitions. [2021-06-05 20:42:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:42:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:35,702 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:42:35,702 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:42:35,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1036.1ms TimeCoverageRelationStatistics Valid=403, Invalid=2677, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:42:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:42:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 230. [2021-06-05 20:42:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.034934497816594) internal successors, (466), 229 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 466 transitions. [2021-06-05 20:42:35,705 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 466 transitions. Word has length 21 [2021-06-05 20:42:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:35,705 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 466 transitions. [2021-06-05 20:42:35,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 466 transitions. [2021-06-05 20:42:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:35,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:35,705 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:35,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:35,905 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1637264869, now seen corresponding path program 362 times [2021-06-05 20:42:35,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:35,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572456550] [2021-06-05 20:42:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:36,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:36,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572456550] [2021-06-05 20:42:36,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572456550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:36,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286191535] [2021-06-05 20:42:36,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:36,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:36,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:36,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:36,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:36,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286191535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:36,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:36,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:36,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447581921] [2021-06-05 20:42:36,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:36,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:36,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:36,488 INFO L87 Difference]: Start difference. First operand 230 states and 466 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:37,204 INFO L93 Difference]: Finished difference Result 330 states and 653 transitions. [2021-06-05 20:42:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:42:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:37,205 INFO L225 Difference]: With dead ends: 330 [2021-06-05 20:42:37,205 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 20:42:37,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 793.6ms TimeCoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:42:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 20:42:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 230. [2021-06-05 20:42:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.034934497816594) internal successors, (466), 229 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 466 transitions. [2021-06-05 20:42:37,208 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 466 transitions. Word has length 21 [2021-06-05 20:42:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:37,208 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 466 transitions. [2021-06-05 20:42:37,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 466 transitions. [2021-06-05 20:42:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:37,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:37,208 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:37,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 20:42:37,408 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:37,409 INFO L82 PathProgramCache]: Analyzing trace with hash -745090163, now seen corresponding path program 363 times [2021-06-05 20:42:37,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:37,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009682377] [2021-06-05 20:42:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:37,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:37,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009682377] [2021-06-05 20:42:37,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009682377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:37,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646059217] [2021-06-05 20:42:37,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:37,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:42:37,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:37,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:38,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646059217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:38,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:38,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:38,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639568625] [2021-06-05 20:42:38,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:38,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:38,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:38,000 INFO L87 Difference]: Start difference. First operand 230 states and 466 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:38,715 INFO L93 Difference]: Finished difference Result 333 states and 658 transitions. [2021-06-05 20:42:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:42:38,715 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:38,716 INFO L225 Difference]: With dead ends: 333 [2021-06-05 20:42:38,716 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 20:42:38,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 800.7ms TimeCoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:42:38,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 20:42:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 232. [2021-06-05 20:42:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.034632034632035) internal successors, (470), 231 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 470 transitions. [2021-06-05 20:42:38,718 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 470 transitions. Word has length 21 [2021-06-05 20:42:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:38,718 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 470 transitions. [2021-06-05 20:42:38,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 470 transitions. [2021-06-05 20:42:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:38,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:38,718 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:38,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:38,919 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1694194569, now seen corresponding path program 364 times [2021-06-05 20:42:38,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:38,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735938988] [2021-06-05 20:42:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:39,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:39,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735938988] [2021-06-05 20:42:39,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735938988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:39,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489383953] [2021-06-05 20:42:39,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:39,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:42:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:39,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:39,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489383953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:39,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:39,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:39,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718436386] [2021-06-05 20:42:39,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:39,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:39,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:39,503 INFO L87 Difference]: Start difference. First operand 232 states and 470 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:40,456 INFO L93 Difference]: Finished difference Result 342 states and 673 transitions. [2021-06-05 20:42:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:42:40,456 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:40,456 INFO L225 Difference]: With dead ends: 342 [2021-06-05 20:42:40,456 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 20:42:40,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1075.4ms TimeCoverageRelationStatistics Valid=393, Invalid=2687, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:42:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 20:42:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 228. [2021-06-05 20:42:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0352422907488985) internal successors, (462), 227 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 462 transitions. [2021-06-05 20:42:40,459 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 462 transitions. Word has length 21 [2021-06-05 20:42:40,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:40,459 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 462 transitions. [2021-06-05 20:42:40,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 462 transitions. [2021-06-05 20:42:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:40,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:40,459 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:40,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:40,659 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:40,660 INFO L82 PathProgramCache]: Analyzing trace with hash -985536311, now seen corresponding path program 365 times [2021-06-05 20:42:40,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:40,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095990272] [2021-06-05 20:42:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:40,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:40,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095990272] [2021-06-05 20:42:40,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095990272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:40,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186349348] [2021-06-05 20:42:40,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:40,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:40,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:40,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:40,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:41,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186349348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:41,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:41,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:41,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521620385] [2021-06-05 20:42:41,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:41,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:41,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:41,244 INFO L87 Difference]: Start difference. First operand 228 states and 462 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:42,097 INFO L93 Difference]: Finished difference Result 340 states and 672 transitions. [2021-06-05 20:42:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:42:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:42,098 INFO L225 Difference]: With dead ends: 340 [2021-06-05 20:42:42,098 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 20:42:42,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 896.2ms TimeCoverageRelationStatistics Valid=319, Invalid=2231, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:42:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 20:42:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 232. [2021-06-05 20:42:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.038961038961039) internal successors, (471), 231 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 471 transitions. [2021-06-05 20:42:42,100 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 471 transitions. Word has length 21 [2021-06-05 20:42:42,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:42,100 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 471 transitions. [2021-06-05 20:42:42,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 471 transitions. [2021-06-05 20:42:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:42,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:42,101 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:42,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:42,301 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:42,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1453748421, now seen corresponding path program 366 times [2021-06-05 20:42:42,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:42,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723451388] [2021-06-05 20:42:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:42,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723451388] [2021-06-05 20:42:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723451388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494740800] [2021-06-05 20:42:42,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:42,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:42:42,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:42,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:42,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:42,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494740800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:42,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:42,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:42,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903509223] [2021-06-05 20:42:42,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:42,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:42,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:42,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:42,882 INFO L87 Difference]: Start difference. First operand 232 states and 471 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:43,824 INFO L93 Difference]: Finished difference Result 353 states and 689 transitions. [2021-06-05 20:42:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:42:43,825 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:43,825 INFO L225 Difference]: With dead ends: 353 [2021-06-05 20:42:43,825 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 20:42:43,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 979.6ms TimeCoverageRelationStatistics Valid=373, Invalid=2489, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:42:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 20:42:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 230. [2021-06-05 20:42:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.039301310043668) internal successors, (467), 229 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 467 transitions. [2021-06-05 20:42:43,827 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 467 transitions. Word has length 21 [2021-06-05 20:42:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:43,828 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 467 transitions. [2021-06-05 20:42:43,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 467 transitions. [2021-06-05 20:42:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:43,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:43,828 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:44,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:44,028 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:44,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2097499963, now seen corresponding path program 367 times [2021-06-05 20:42:44,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:44,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889399330] [2021-06-05 20:42:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:44,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889399330] [2021-06-05 20:42:44,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889399330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826300867] [2021-06-05 20:42:44,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:44,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:44,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:44,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826300867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:44,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:44,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:44,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668182391] [2021-06-05 20:42:44,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:44,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:44,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:44,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:44,615 INFO L87 Difference]: Start difference. First operand 230 states and 467 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:45,751 INFO L93 Difference]: Finished difference Result 379 states and 744 transitions. [2021-06-05 20:42:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:42:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:45,752 INFO L225 Difference]: With dead ends: 379 [2021-06-05 20:42:45,752 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 20:42:45,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1095.4ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:42:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 20:42:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 228. [2021-06-05 20:42:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0308370044052864) internal successors, (461), 227 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 461 transitions. [2021-06-05 20:42:45,754 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 461 transitions. Word has length 21 [2021-06-05 20:42:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:45,754 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 461 transitions. [2021-06-05 20:42:45,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:45,754 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 461 transitions. [2021-06-05 20:42:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:45,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:45,755 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:45,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 20:42:45,955 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:45,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2073841455, now seen corresponding path program 368 times [2021-06-05 20:42:45,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:45,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285451748] [2021-06-05 20:42:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:46,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:46,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285451748] [2021-06-05 20:42:46,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285451748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:46,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586278277] [2021-06-05 20:42:46,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:46,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:46,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:46,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:46,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:46,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586278277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:46,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:46,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:46,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040010374] [2021-06-05 20:42:46,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:46,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:46,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:46,542 INFO L87 Difference]: Start difference. First operand 228 states and 461 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:47,496 INFO L93 Difference]: Finished difference Result 352 states and 701 transitions. [2021-06-05 20:42:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:42:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:47,497 INFO L225 Difference]: With dead ends: 352 [2021-06-05 20:42:47,497 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 20:42:47,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 984.7ms TimeCoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:42:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 20:42:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 229. [2021-06-05 20:42:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.030701754385965) internal successors, (463), 228 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 463 transitions. [2021-06-05 20:42:47,500 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 463 transitions. Word has length 21 [2021-06-05 20:42:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:47,500 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 463 transitions. [2021-06-05 20:42:47,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 463 transitions. [2021-06-05 20:42:47,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:47,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:47,500 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:47,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 20:42:47,701 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:47,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1155891265, now seen corresponding path program 369 times [2021-06-05 20:42:47,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:47,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630554828] [2021-06-05 20:42:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:47,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:47,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630554828] [2021-06-05 20:42:47,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630554828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:47,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772693934] [2021-06-05 20:42:47,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:47,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:42:47,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:47,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:47,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:48,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772693934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:48,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:48,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:48,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706258906] [2021-06-05 20:42:48,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:48,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:48,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:48,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:48,295 INFO L87 Difference]: Start difference. First operand 229 states and 463 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:49,375 INFO L93 Difference]: Finished difference Result 358 states and 712 transitions. [2021-06-05 20:42:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:42:49,376 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:49,376 INFO L225 Difference]: With dead ends: 358 [2021-06-05 20:42:49,376 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 20:42:49,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1087.5ms TimeCoverageRelationStatistics Valid=442, Invalid=2750, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:42:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 20:42:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 226. [2021-06-05 20:42:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.031111111111111) internal successors, (457), 225 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 457 transitions. [2021-06-05 20:42:49,378 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 457 transitions. Word has length 21 [2021-06-05 20:42:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:49,378 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 457 transitions. [2021-06-05 20:42:49,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 457 transitions. [2021-06-05 20:42:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:49,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:49,379 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:49,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 20:42:49,579 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash -451646779, now seen corresponding path program 370 times [2021-06-05 20:42:49,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:49,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930008866] [2021-06-05 20:42:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:49,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:49,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930008866] [2021-06-05 20:42:49,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930008866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:49,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976174135] [2021-06-05 20:42:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:49,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:42:49,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:49,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:49,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976174135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:50,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:50,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:50,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282377964] [2021-06-05 20:42:50,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:50,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:50,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:50,179 INFO L87 Difference]: Start difference. First operand 226 states and 457 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:50,947 INFO L93 Difference]: Finished difference Result 324 states and 642 transitions. [2021-06-05 20:42:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:42:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:50,947 INFO L225 Difference]: With dead ends: 324 [2021-06-05 20:42:50,947 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 20:42:50,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 834.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:42:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 20:42:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 222. [2021-06-05 20:42:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.0271493212669682) internal successors, (448), 221 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 448 transitions. [2021-06-05 20:42:50,950 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 448 transitions. Word has length 21 [2021-06-05 20:42:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:50,950 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 448 transitions. [2021-06-05 20:42:50,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 448 transitions. [2021-06-05 20:42:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:50,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:50,950 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:51,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:51,151 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:51,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2114513601, now seen corresponding path program 371 times [2021-06-05 20:42:51,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:51,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339466579] [2021-06-05 20:42:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:51,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:51,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339466579] [2021-06-05 20:42:51,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339466579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:51,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716118373] [2021-06-05 20:42:51,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:51,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:51,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:51,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:51,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716118373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:51,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:51,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:51,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989272236] [2021-06-05 20:42:51,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:51,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:51,746 INFO L87 Difference]: Start difference. First operand 222 states and 448 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:52,784 INFO L93 Difference]: Finished difference Result 344 states and 683 transitions. [2021-06-05 20:42:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:42:52,784 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:52,785 INFO L225 Difference]: With dead ends: 344 [2021-06-05 20:42:52,785 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 20:42:52,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 950.2ms TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:42:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 20:42:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 221. [2021-06-05 20:42:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.022727272727273) internal successors, (445), 220 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 445 transitions. [2021-06-05 20:42:52,787 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 445 transitions. Word has length 21 [2021-06-05 20:42:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:52,787 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 445 transitions. [2021-06-05 20:42:52,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 445 transitions. [2021-06-05 20:42:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:52,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:52,787 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:52,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 20:42:52,988 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:52,988 INFO L82 PathProgramCache]: Analyzing trace with hash 500946867, now seen corresponding path program 372 times [2021-06-05 20:42:52,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:52,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331753947] [2021-06-05 20:42:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:53,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:53,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331753947] [2021-06-05 20:42:53,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331753947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:53,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001765103] [2021-06-05 20:42:53,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:53,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:42:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:53,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:53,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001765103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:53,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:53,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:53,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114553616] [2021-06-05 20:42:53,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:53,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:53,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:53,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:53,584 INFO L87 Difference]: Start difference. First operand 221 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:54,526 INFO L93 Difference]: Finished difference Result 344 states and 682 transitions. [2021-06-05 20:42:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 20:42:54,526 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:54,526 INFO L225 Difference]: With dead ends: 344 [2021-06-05 20:42:54,526 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 20:42:54,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 984.8ms TimeCoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:42:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 20:42:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 220. [2021-06-05 20:42:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0182648401826486) internal successors, (442), 219 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 442 transitions. [2021-06-05 20:42:54,529 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 442 transitions. Word has length 21 [2021-06-05 20:42:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:54,529 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 442 transitions. [2021-06-05 20:42:54,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:54,529 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 442 transitions. [2021-06-05 20:42:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:54,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:54,529 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:54,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:54,730 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:54,730 INFO L82 PathProgramCache]: Analyzing trace with hash -417003323, now seen corresponding path program 373 times [2021-06-05 20:42:54,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:54,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715044684] [2021-06-05 20:42:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:54,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:54,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715044684] [2021-06-05 20:42:54,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715044684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:54,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134221045] [2021-06-05 20:42:54,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:54,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:55,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134221045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:55,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:55,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:55,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447094948] [2021-06-05 20:42:55,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:55,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:55,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:55,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:55,329 INFO L87 Difference]: Start difference. First operand 220 states and 442 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:56,422 INFO L93 Difference]: Finished difference Result 345 states and 682 transitions. [2021-06-05 20:42:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:42:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:56,423 INFO L225 Difference]: With dead ends: 345 [2021-06-05 20:42:56,423 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 20:42:56,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1069.4ms TimeCoverageRelationStatistics Valid=468, Invalid=2724, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:42:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 20:42:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 209. [2021-06-05 20:42:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.0048076923076925) internal successors, (417), 208 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 417 transitions. [2021-06-05 20:42:56,425 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 417 transitions. Word has length 21 [2021-06-05 20:42:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:56,425 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 417 transitions. [2021-06-05 20:42:56,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 417 transitions. [2021-06-05 20:42:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:56,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:56,426 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:56,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 20:42:56,626 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:56,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:56,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1384768719, now seen corresponding path program 374 times [2021-06-05 20:42:56,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:56,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803983513] [2021-06-05 20:42:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:56,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:56,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803983513] [2021-06-05 20:42:56,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803983513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:56,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330748236] [2021-06-05 20:42:56,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:56,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:42:56,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:56,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:57,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330748236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:57,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:57,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:57,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587238850] [2021-06-05 20:42:57,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:57,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:57,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:57,209 INFO L87 Difference]: Start difference. First operand 209 states and 417 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:57,926 INFO L93 Difference]: Finished difference Result 317 states and 622 transitions. [2021-06-05 20:42:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:42:57,926 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:57,927 INFO L225 Difference]: With dead ends: 317 [2021-06-05 20:42:57,927 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 20:42:57,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 795.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:42:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 20:42:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 214. [2021-06-05 20:42:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.0093896713615025) internal successors, (428), 213 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 428 transitions. [2021-06-05 20:42:57,929 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 428 transitions. Word has length 21 [2021-06-05 20:42:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:57,929 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 428 transitions. [2021-06-05 20:42:57,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 428 transitions. [2021-06-05 20:42:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:57,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:57,930 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:58,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:58,133 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2018023871, now seen corresponding path program 375 times [2021-06-05 20:42:58,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:58,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432579293] [2021-06-05 20:42:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:58,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:58,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432579293] [2021-06-05 20:42:58,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432579293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:58,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138205656] [2021-06-05 20:42:58,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:58,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:42:58,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:58,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:58,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:58,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138205656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:58,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:58,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:42:58,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562556056] [2021-06-05 20:42:58,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:42:58,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:58,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:42:58,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:42:58,716 INFO L87 Difference]: Start difference. First operand 214 states and 428 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:59,346 INFO L93 Difference]: Finished difference Result 320 states and 627 transitions. [2021-06-05 20:42:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:42:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:42:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:59,347 INFO L225 Difference]: With dead ends: 320 [2021-06-05 20:42:59,347 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 20:42:59,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 792.7ms TimeCoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:42:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 20:42:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 216. [2021-06-05 20:42:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.0093023255813955) internal successors, (432), 215 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 432 transitions. [2021-06-05 20:42:59,349 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 432 transitions. Word has length 21 [2021-06-05 20:42:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:59,349 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 432 transitions. [2021-06-05 20:42:59,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 432 transitions. [2021-06-05 20:42:59,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:42:59,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:59,349 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:59,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:59,550 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash 421260861, now seen corresponding path program 376 times [2021-06-05 20:42:59,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:59,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480026817] [2021-06-05 20:42:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:59,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:59,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480026817] [2021-06-05 20:42:59,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480026817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:59,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042749449] [2021-06-05 20:42:59,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:59,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:42:59,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:59,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:42:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:00,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042749449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:00,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:00,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:00,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797524075] [2021-06-05 20:43:00,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:00,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:00,130 INFO L87 Difference]: Start difference. First operand 216 states and 432 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:01,228 INFO L93 Difference]: Finished difference Result 348 states and 675 transitions. [2021-06-05 20:43:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:43:01,228 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:01,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:01,229 INFO L225 Difference]: With dead ends: 348 [2021-06-05 20:43:01,229 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 20:43:01,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1077.7ms TimeCoverageRelationStatistics Valid=407, Invalid=2785, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:43:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 20:43:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 220. [2021-06-05 20:43:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0182648401826486) internal successors, (442), 219 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 442 transitions. [2021-06-05 20:43:01,231 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 442 transitions. Word has length 21 [2021-06-05 20:43:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:01,231 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 442 transitions. [2021-06-05 20:43:01,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 442 transitions. [2021-06-05 20:43:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:01,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:01,231 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:01,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:01,433 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:01,433 INFO L82 PathProgramCache]: Analyzing trace with hash 413938041, now seen corresponding path program 377 times [2021-06-05 20:43:01,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:01,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79572388] [2021-06-05 20:43:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:01,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79572388] [2021-06-05 20:43:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79572388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48636156] [2021-06-05 20:43:01,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:01,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:43:01,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:01,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:01,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:02,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48636156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:02,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:02,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:02,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975409745] [2021-06-05 20:43:02,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:02,005 INFO L87 Difference]: Start difference. First operand 220 states and 442 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:02,927 INFO L93 Difference]: Finished difference Result 349 states and 685 transitions. [2021-06-05 20:43:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:43:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:02,927 INFO L225 Difference]: With dead ends: 349 [2021-06-05 20:43:02,927 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 20:43:02,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1022.4ms TimeCoverageRelationStatistics Valid=411, Invalid=2781, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:43:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 20:43:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 212. [2021-06-05 20:43:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.009478672985782) internal successors, (424), 211 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 424 transitions. [2021-06-05 20:43:02,930 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 424 transitions. Word has length 21 [2021-06-05 20:43:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:02,930 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 424 transitions. [2021-06-05 20:43:02,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 424 transitions. [2021-06-05 20:43:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:02,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:02,930 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:03,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 20:43:03,131 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2036497277, now seen corresponding path program 378 times [2021-06-05 20:43:03,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:03,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393187920] [2021-06-05 20:43:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:03,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:03,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393187920] [2021-06-05 20:43:03,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393187920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:03,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723419293] [2021-06-05 20:43:03,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:03,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:43:03,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:03,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:03,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723419293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:03,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:03,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:03,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222673714] [2021-06-05 20:43:03,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:03,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:03,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:03,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:03,738 INFO L87 Difference]: Start difference. First operand 212 states and 424 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:04,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:04,597 INFO L93 Difference]: Finished difference Result 327 states and 641 transitions. [2021-06-05 20:43:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:43:04,597 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:04,598 INFO L225 Difference]: With dead ends: 327 [2021-06-05 20:43:04,598 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 20:43:04,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 895.7ms TimeCoverageRelationStatistics Valid=300, Invalid=2150, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:43:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 20:43:04,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 216. [2021-06-05 20:43:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.013953488372093) internal successors, (433), 215 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 433 transitions. [2021-06-05 20:43:04,600 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 433 transitions. Word has length 21 [2021-06-05 20:43:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:04,600 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 433 transitions. [2021-06-05 20:43:04,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 433 transitions. [2021-06-05 20:43:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:04,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:04,600 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:04,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 20:43:04,801 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash 180814713, now seen corresponding path program 379 times [2021-06-05 20:43:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:04,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759991693] [2021-06-05 20:43:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:04,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:04,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759991693] [2021-06-05 20:43:04,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759991693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:04,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448251160] [2021-06-05 20:43:04,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:04,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:04,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:05,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448251160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:05,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:05,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:05,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837837153] [2021-06-05 20:43:05,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:05,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:05,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:05,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:05,381 INFO L87 Difference]: Start difference. First operand 216 states and 433 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:06,363 INFO L93 Difference]: Finished difference Result 359 states and 691 transitions. [2021-06-05 20:43:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:43:06,364 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:06,364 INFO L225 Difference]: With dead ends: 359 [2021-06-05 20:43:06,364 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 20:43:06,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 989.7ms TimeCoverageRelationStatistics Valid=385, Invalid=2585, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:43:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 20:43:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 226. [2021-06-05 20:43:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.026666666666667) internal successors, (456), 225 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 456 transitions. [2021-06-05 20:43:06,367 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 456 transitions. Word has length 21 [2021-06-05 20:43:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:06,367 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 456 transitions. [2021-06-05 20:43:06,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 456 transitions. [2021-06-05 20:43:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:06,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:06,367 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:06,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 20:43:06,567 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:06,568 INFO L82 PathProgramCache]: Analyzing trace with hash 173491893, now seen corresponding path program 380 times [2021-06-05 20:43:06,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:06,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493952103] [2021-06-05 20:43:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:06,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493952103] [2021-06-05 20:43:06,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493952103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:06,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972686642] [2021-06-05 20:43:06,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:06,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:43:06,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:06,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:06,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:07,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972686642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:07,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:07,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:07,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229715105] [2021-06-05 20:43:07,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:07,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:07,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:07,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:07,150 INFO L87 Difference]: Start difference. First operand 226 states and 456 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:08,096 INFO L93 Difference]: Finished difference Result 360 states and 701 transitions. [2021-06-05 20:43:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:43:08,096 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:08,096 INFO L225 Difference]: With dead ends: 360 [2021-06-05 20:43:08,096 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 20:43:08,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 960.9ms TimeCoverageRelationStatistics Valid=393, Invalid=2577, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:43:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 20:43:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 220. [2021-06-05 20:43:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.0182648401826486) internal successors, (442), 219 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 442 transitions. [2021-06-05 20:43:08,099 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 442 transitions. Word has length 21 [2021-06-05 20:43:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:08,099 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 442 transitions. [2021-06-05 20:43:08,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 442 transitions. [2021-06-05 20:43:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:08,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:08,099 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:08,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 20:43:08,300 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:08,300 INFO L82 PathProgramCache]: Analyzing trace with hash 924533625, now seen corresponding path program 381 times [2021-06-05 20:43:08,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:08,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613178289] [2021-06-05 20:43:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:08,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:08,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613178289] [2021-06-05 20:43:08,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613178289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:08,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286649376] [2021-06-05 20:43:08,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:08,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:43:08,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:08,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:08,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286649376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:08,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:08,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:08,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005144516] [2021-06-05 20:43:08,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:08,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:08,885 INFO L87 Difference]: Start difference. First operand 220 states and 442 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:10,342 INFO L93 Difference]: Finished difference Result 394 states and 767 transitions. [2021-06-05 20:43:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 20:43:10,343 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:10,343 INFO L225 Difference]: With dead ends: 394 [2021-06-05 20:43:10,343 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 20:43:10,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1268.2ms TimeCoverageRelationStatistics Valid=546, Invalid=3486, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:43:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 20:43:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 229. [2021-06-05 20:43:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.043859649122807) internal successors, (466), 228 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 466 transitions. [2021-06-05 20:43:10,346 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 466 transitions. Word has length 21 [2021-06-05 20:43:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:10,346 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 466 transitions. [2021-06-05 20:43:10,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 466 transitions. [2021-06-05 20:43:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:10,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:10,346 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:10,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 20:43:10,547 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:10,547 INFO L82 PathProgramCache]: Analyzing trace with hash 917210805, now seen corresponding path program 382 times [2021-06-05 20:43:10,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:10,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962369990] [2021-06-05 20:43:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:10,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:10,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962369990] [2021-06-05 20:43:10,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962369990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:10,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559900991] [2021-06-05 20:43:10,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:10,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:43:10,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:10,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:11,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559900991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:11,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:11,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:11,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005613770] [2021-06-05 20:43:11,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:11,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:11,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:11,126 INFO L87 Difference]: Start difference. First operand 229 states and 466 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:12,494 INFO L93 Difference]: Finished difference Result 408 states and 793 transitions. [2021-06-05 20:43:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 20:43:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:12,494 INFO L225 Difference]: With dead ends: 408 [2021-06-05 20:43:12,495 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 20:43:12,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1225.0ms TimeCoverageRelationStatistics Valid=568, Invalid=3592, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 20:43:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 20:43:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 225. [2021-06-05 20:43:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-06-05 20:43:12,497 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 21 [2021-06-05 20:43:12,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:12,497 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-06-05 20:43:12,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-06-05 20:43:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:12,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:12,498 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:12,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:12,698 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:12,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:12,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1266467147, now seen corresponding path program 383 times [2021-06-05 20:43:12,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:12,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751332184] [2021-06-05 20:43:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:12,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751332184] [2021-06-05 20:43:12,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751332184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323125103] [2021-06-05 20:43:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:12,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:43:12,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:12,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:13,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323125103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:13,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:13,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:13,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401125372] [2021-06-05 20:43:13,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:13,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:13,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:13,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:13,277 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:14,484 INFO L93 Difference]: Finished difference Result 393 states and 771 transitions. [2021-06-05 20:43:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:43:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:14,484 INFO L225 Difference]: With dead ends: 393 [2021-06-05 20:43:14,484 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 20:43:14,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1126.3ms TimeCoverageRelationStatistics Valid=509, Invalid=3031, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:43:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 20:43:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 221. [2021-06-05 20:43:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.0136363636363637) internal successors, (443), 220 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 443 transitions. [2021-06-05 20:43:14,487 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 443 transitions. Word has length 21 [2021-06-05 20:43:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:14,487 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 443 transitions. [2021-06-05 20:43:14,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 443 transitions. [2021-06-05 20:43:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:14,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:14,487 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:14,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 20:43:14,688 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:14,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:14,688 INFO L82 PathProgramCache]: Analyzing trace with hash 800907747, now seen corresponding path program 384 times [2021-06-05 20:43:14,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:14,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760075539] [2021-06-05 20:43:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:14,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:14,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760075539] [2021-06-05 20:43:14,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760075539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:14,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743599210] [2021-06-05 20:43:14,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:14,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:43:14,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:14,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:14,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:15,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743599210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:15,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:15,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:15,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029796837] [2021-06-05 20:43:15,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:15,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:15,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:15,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:15,272 INFO L87 Difference]: Start difference. First operand 221 states and 443 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:16,463 INFO L93 Difference]: Finished difference Result 363 states and 715 transitions. [2021-06-05 20:43:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:43:16,463 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:16,464 INFO L225 Difference]: With dead ends: 363 [2021-06-05 20:43:16,464 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 20:43:16,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1084.9ms TimeCoverageRelationStatistics Valid=462, Invalid=2960, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:43:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 20:43:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 226. [2021-06-05 20:43:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.0355555555555553) internal successors, (458), 225 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 458 transitions. [2021-06-05 20:43:16,466 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 458 transitions. Word has length 21 [2021-06-05 20:43:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:16,466 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 458 transitions. [2021-06-05 20:43:16,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 458 transitions. [2021-06-05 20:43:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:16,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:16,467 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:16,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:16,667 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:16,667 INFO L82 PathProgramCache]: Analyzing trace with hash 793584927, now seen corresponding path program 385 times [2021-06-05 20:43:16,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:16,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049502148] [2021-06-05 20:43:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:16,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:16,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049502148] [2021-06-05 20:43:16,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049502148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:16,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940265473] [2021-06-05 20:43:16,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:16,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:16,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:17,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940265473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:17,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:17,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:17,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760936818] [2021-06-05 20:43:17,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:17,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:17,254 INFO L87 Difference]: Start difference. First operand 226 states and 458 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:18,445 INFO L93 Difference]: Finished difference Result 378 states and 742 transitions. [2021-06-05 20:43:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:43:18,445 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:18,446 INFO L225 Difference]: With dead ends: 378 [2021-06-05 20:43:18,446 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:43:18,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:43:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:43:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 224. [2021-06-05 20:43:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0269058295964126) internal successors, (452), 223 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 452 transitions. [2021-06-05 20:43:18,448 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 452 transitions. Word has length 21 [2021-06-05 20:43:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:18,448 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 452 transitions. [2021-06-05 20:43:18,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 452 transitions. [2021-06-05 20:43:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:18,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:18,449 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:18,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:18,649 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:18,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1390093025, now seen corresponding path program 386 times [2021-06-05 20:43:18,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:18,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653817394] [2021-06-05 20:43:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:18,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:18,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653817394] [2021-06-05 20:43:18,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653817394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:18,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219653735] [2021-06-05 20:43:18,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:18,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:43:18,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:18,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:19,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219653735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:19,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:19,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:19,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657826215] [2021-06-05 20:43:19,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:19,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:19,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:19,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:19,237 INFO L87 Difference]: Start difference. First operand 224 states and 452 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:20,522 INFO L93 Difference]: Finished difference Result 381 states and 754 transitions. [2021-06-05 20:43:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:43:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:20,523 INFO L225 Difference]: With dead ends: 381 [2021-06-05 20:43:20,523 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 20:43:20,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1173.4ms TimeCoverageRelationStatistics Valid=522, Invalid=3138, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:43:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 20:43:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 222. [2021-06-05 20:43:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.013574660633484) internal successors, (445), 221 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 445 transitions. [2021-06-05 20:43:20,526 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 445 transitions. Word has length 21 [2021-06-05 20:43:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:20,526 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 445 transitions. [2021-06-05 20:43:20,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 445 transitions. [2021-06-05 20:43:20,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:20,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:20,526 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:20,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-06-05 20:43:20,726 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:20,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:20,727 INFO L82 PathProgramCache]: Analyzing trace with hash -117042443, now seen corresponding path program 387 times [2021-06-05 20:43:20,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:20,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714648282] [2021-06-05 20:43:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:20,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:20,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714648282] [2021-06-05 20:43:20,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714648282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:20,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471285187] [2021-06-05 20:43:20,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:20,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:43:20,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:20,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:20,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:21,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471285187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:21,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:21,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:21,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725591999] [2021-06-05 20:43:21,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:21,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:21,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:21,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:21,312 INFO L87 Difference]: Start difference. First operand 222 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:22,532 INFO L93 Difference]: Finished difference Result 368 states and 726 transitions. [2021-06-05 20:43:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:43:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:22,532 INFO L225 Difference]: With dead ends: 368 [2021-06-05 20:43:22,532 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 20:43:22,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1147.4ms TimeCoverageRelationStatistics Valid=497, Invalid=3163, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:43:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 20:43:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 228. [2021-06-05 20:43:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0352422907488985) internal successors, (462), 227 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 462 transitions. [2021-06-05 20:43:22,535 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 462 transitions. Word has length 21 [2021-06-05 20:43:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:22,535 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 462 transitions. [2021-06-05 20:43:22,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 462 transitions. [2021-06-05 20:43:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:22,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:22,535 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:22,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:22,736 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:22,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:22,736 INFO L82 PathProgramCache]: Analyzing trace with hash -124365263, now seen corresponding path program 388 times [2021-06-05 20:43:22,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:22,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504181815] [2021-06-05 20:43:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:22,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:22,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504181815] [2021-06-05 20:43:22,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504181815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:22,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195583953] [2021-06-05 20:43:22,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:22,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:43:22,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:22,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195583953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:23,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:23,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:23,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847523627] [2021-06-05 20:43:23,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:23,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:23,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:23,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:23,319 INFO L87 Difference]: Start difference. First operand 228 states and 462 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:24,434 INFO L93 Difference]: Finished difference Result 383 states and 753 transitions. [2021-06-05 20:43:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 20:43:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:24,435 INFO L225 Difference]: With dead ends: 383 [2021-06-05 20:43:24,435 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 20:43:24,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1154.8ms TimeCoverageRelationStatistics Valid=538, Invalid=3368, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:43:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 20:43:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 224. [2021-06-05 20:43:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0269058295964126) internal successors, (452), 223 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 452 transitions. [2021-06-05 20:43:24,438 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 452 transitions. Word has length 21 [2021-06-05 20:43:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:24,438 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 452 transitions. [2021-06-05 20:43:24,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 452 transitions. [2021-06-05 20:43:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:24,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:24,438 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:24,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:24,639 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:24,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1986924081, now seen corresponding path program 389 times [2021-06-05 20:43:24,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:24,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756305264] [2021-06-05 20:43:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:24,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:24,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756305264] [2021-06-05 20:43:24,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756305264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:24,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984126667] [2021-06-05 20:43:24,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:24,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:43:24,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:24,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:24,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:25,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984126667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:25,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:25,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:25,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324471151] [2021-06-05 20:43:25,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:25,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:25,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:25,226 INFO L87 Difference]: Start difference. First operand 224 states and 452 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:26,388 INFO L93 Difference]: Finished difference Result 380 states and 752 transitions. [2021-06-05 20:43:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:43:26,389 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:26,389 INFO L225 Difference]: With dead ends: 380 [2021-06-05 20:43:26,389 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 20:43:26,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1104.1ms TimeCoverageRelationStatistics Valid=500, Invalid=2922, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:43:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 20:43:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 219. [2021-06-05 20:43:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.0137614678899083) internal successors, (439), 218 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 439 transitions. [2021-06-05 20:43:26,391 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 439 transitions. Word has length 21 [2021-06-05 20:43:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:26,392 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 439 transitions. [2021-06-05 20:43:26,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 439 transitions. [2021-06-05 20:43:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:26,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:26,392 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:26,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 20:43:26,592 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1724580487, now seen corresponding path program 390 times [2021-06-05 20:43:26,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:26,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982637818] [2021-06-05 20:43:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:26,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982637818] [2021-06-05 20:43:26,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982637818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152235858] [2021-06-05 20:43:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:26,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:43:26,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:26,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:26,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:27,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152235858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:27,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:27,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:27,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260081982] [2021-06-05 20:43:27,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:27,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:27,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:27,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:27,188 INFO L87 Difference]: Start difference. First operand 219 states and 439 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:27,891 INFO L93 Difference]: Finished difference Result 315 states and 620 transitions. [2021-06-05 20:43:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:43:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:27,892 INFO L225 Difference]: With dead ends: 315 [2021-06-05 20:43:27,892 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 20:43:27,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 799.1ms TimeCoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:43:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 20:43:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 217. [2021-06-05 20:43:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.009259259259259) internal successors, (434), 216 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 434 transitions. [2021-06-05 20:43:27,894 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 434 transitions. Word has length 21 [2021-06-05 20:43:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:27,894 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 434 transitions. [2021-06-05 20:43:27,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 434 transitions. [2021-06-05 20:43:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:27,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:27,894 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:28,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:28,095 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:28,095 INFO L82 PathProgramCache]: Analyzing trace with hash 841579893, now seen corresponding path program 391 times [2021-06-05 20:43:28,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:28,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110454660] [2021-06-05 20:43:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:28,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:28,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110454660] [2021-06-05 20:43:28,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110454660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:28,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151633635] [2021-06-05 20:43:28,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:28,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:28,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:28,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151633635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:28,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:28,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:28,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710153274] [2021-06-05 20:43:28,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:28,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:28,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:28,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:28,689 INFO L87 Difference]: Start difference. First operand 217 states and 434 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:29,642 INFO L93 Difference]: Finished difference Result 361 states and 711 transitions. [2021-06-05 20:43:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:43:29,642 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:29,643 INFO L225 Difference]: With dead ends: 361 [2021-06-05 20:43:29,643 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 20:43:29,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 991.2ms TimeCoverageRelationStatistics Valid=423, Invalid=2547, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:43:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 20:43:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 223. [2021-06-05 20:43:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.036036036036036) internal successors, (452), 222 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 452 transitions. [2021-06-05 20:43:29,645 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 452 transitions. Word has length 21 [2021-06-05 20:43:29,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:29,645 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 452 transitions. [2021-06-05 20:43:29,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 452 transitions. [2021-06-05 20:43:29,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:29,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:29,646 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:29,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 20:43:29,846 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:29,846 INFO L82 PathProgramCache]: Analyzing trace with hash 834257073, now seen corresponding path program 392 times [2021-06-05 20:43:29,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:29,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471525797] [2021-06-05 20:43:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:30,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:30,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471525797] [2021-06-05 20:43:30,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471525797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:30,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849118526] [2021-06-05 20:43:30,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:30,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:43:30,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:30,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:30,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849118526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:30,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:30,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524951125] [2021-06-05 20:43:30,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:30,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:30,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:30,433 INFO L87 Difference]: Start difference. First operand 223 states and 452 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:31,552 INFO L93 Difference]: Finished difference Result 376 states and 738 transitions. [2021-06-05 20:43:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:43:31,552 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:31,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:31,553 INFO L225 Difference]: With dead ends: 376 [2021-06-05 20:43:31,553 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 20:43:31,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1032.4ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:43:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 20:43:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 221. [2021-06-05 20:43:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.0272727272727273) internal successors, (446), 220 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 446 transitions. [2021-06-05 20:43:31,555 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 446 transitions. Word has length 21 [2021-06-05 20:43:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:31,555 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 446 transitions. [2021-06-05 20:43:31,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 446 transitions. [2021-06-05 20:43:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:31,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:31,556 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:31,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:31,769 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:31,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1349420879, now seen corresponding path program 393 times [2021-06-05 20:43:31,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:31,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841835487] [2021-06-05 20:43:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:31,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:31,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841835487] [2021-06-05 20:43:31,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841835487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:31,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936255689] [2021-06-05 20:43:31,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:31,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:43:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:31,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:31,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:32,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936255689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:32,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:32,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817500409] [2021-06-05 20:43:32,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:32,439 INFO L87 Difference]: Start difference. First operand 221 states and 446 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:33,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:33,716 INFO L93 Difference]: Finished difference Result 392 states and 768 transitions. [2021-06-05 20:43:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:43:33,716 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:33,717 INFO L225 Difference]: With dead ends: 392 [2021-06-05 20:43:33,717 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 20:43:33,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1215.0ms TimeCoverageRelationStatistics Valid=541, Invalid=2999, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:43:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 20:43:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 219. [2021-06-05 20:43:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.0137614678899083) internal successors, (439), 218 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 439 transitions. [2021-06-05 20:43:33,719 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 439 transitions. Word has length 21 [2021-06-05 20:43:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:33,719 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 439 transitions. [2021-06-05 20:43:33,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 439 transitions. [2021-06-05 20:43:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:33,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:33,720 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:33,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 20:43:33,920 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1355851953, now seen corresponding path program 394 times [2021-06-05 20:43:33,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:33,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530681581] [2021-06-05 20:43:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:34,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:34,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530681581] [2021-06-05 20:43:34,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530681581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:34,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768144199] [2021-06-05 20:43:34,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:34,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:43:34,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:34,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:34,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:34,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768144199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:34,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:34,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:34,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954909883] [2021-06-05 20:43:34,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:34,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:34,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:34,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:34,713 INFO L87 Difference]: Start difference. First operand 219 states and 439 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:35,746 INFO L93 Difference]: Finished difference Result 352 states and 691 transitions. [2021-06-05 20:43:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:43:35,747 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:35,747 INFO L225 Difference]: With dead ends: 352 [2021-06-05 20:43:35,747 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 20:43:35,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1238.1ms TimeCoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:43:35,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 20:43:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 218. [2021-06-05 20:43:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.0092165898617513) internal successors, (436), 217 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 436 transitions. [2021-06-05 20:43:35,761 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 436 transitions. Word has length 21 [2021-06-05 20:43:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:35,761 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 436 transitions. [2021-06-05 20:43:35,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 436 transitions. [2021-06-05 20:43:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:35,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:35,761 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:35,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:35,970 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:35,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:35,970 INFO L82 PathProgramCache]: Analyzing trace with hash -771986841, now seen corresponding path program 395 times [2021-06-05 20:43:35,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:35,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952406888] [2021-06-05 20:43:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:36,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:36,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952406888] [2021-06-05 20:43:36,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952406888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:36,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395411542] [2021-06-05 20:43:36,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:36,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:43:36,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:36,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:36,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:36,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395411542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:36,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:36,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:36,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675432119] [2021-06-05 20:43:36,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:36,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:36,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:36,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:36,802 INFO L87 Difference]: Start difference. First operand 218 states and 436 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:38,253 INFO L93 Difference]: Finished difference Result 361 states and 711 transitions. [2021-06-05 20:43:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:43:38,254 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:38,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:38,254 INFO L225 Difference]: With dead ends: 361 [2021-06-05 20:43:38,254 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 20:43:38,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1337.8ms TimeCoverageRelationStatistics Valid=418, Invalid=2552, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:43:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 20:43:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 223. [2021-06-05 20:43:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.0315315315315314) internal successors, (451), 222 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 451 transitions. [2021-06-05 20:43:38,258 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 451 transitions. Word has length 21 [2021-06-05 20:43:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:38,258 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 451 transitions. [2021-06-05 20:43:38,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 451 transitions. [2021-06-05 20:43:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:38,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:38,258 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:38,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 20:43:38,469 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:38,469 INFO L82 PathProgramCache]: Analyzing trace with hash -779309661, now seen corresponding path program 396 times [2021-06-05 20:43:38,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:38,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863274509] [2021-06-05 20:43:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:38,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:38,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863274509] [2021-06-05 20:43:38,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863274509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:38,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537217183] [2021-06-05 20:43:38,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:38,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 20:43:38,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:38,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:38,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:39,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537217183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:39,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:39,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:39,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120083061] [2021-06-05 20:43:39,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:39,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:39,270 INFO L87 Difference]: Start difference. First operand 223 states and 451 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:40,597 INFO L93 Difference]: Finished difference Result 376 states and 738 transitions. [2021-06-05 20:43:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:43:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:40,598 INFO L225 Difference]: With dead ends: 376 [2021-06-05 20:43:40,598 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 20:43:40,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1374.2ms TimeCoverageRelationStatistics Valid=485, Invalid=2821, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:43:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 20:43:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 221. [2021-06-05 20:43:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.022727272727273) internal successors, (445), 220 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 445 transitions. [2021-06-05 20:43:40,602 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 445 transitions. Word has length 21 [2021-06-05 20:43:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:40,602 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 445 transitions. [2021-06-05 20:43:40,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 445 transitions. [2021-06-05 20:43:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:40,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:40,602 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:40,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:40,824 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1331979683, now seen corresponding path program 397 times [2021-06-05 20:43:40,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:40,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068301791] [2021-06-05 20:43:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:41,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:41,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068301791] [2021-06-05 20:43:41,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068301791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:41,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750069402] [2021-06-05 20:43:41,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:41,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:41,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:41,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750069402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:41,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:41,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:41,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184427004] [2021-06-05 20:43:41,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:41,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:41,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:41,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:41,621 INFO L87 Difference]: Start difference. First operand 221 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:43,114 INFO L93 Difference]: Finished difference Result 378 states and 748 transitions. [2021-06-05 20:43:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:43:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:43,115 INFO L225 Difference]: With dead ends: 378 [2021-06-05 20:43:43,115 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:43:43,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1517.7ms TimeCoverageRelationStatistics Valid=534, Invalid=3006, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:43:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:43:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 219. [2021-06-05 20:43:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.0091743119266057) internal successors, (438), 218 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 438 transitions. [2021-06-05 20:43:43,118 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 438 transitions. Word has length 21 [2021-06-05 20:43:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:43,118 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 438 transitions. [2021-06-05 20:43:43,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 438 transitions. [2021-06-05 20:43:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:43,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:43,119 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:43,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:43,329 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1689937031, now seen corresponding path program 398 times [2021-06-05 20:43:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:43,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321537877] [2021-06-05 20:43:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:43,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:43,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321537877] [2021-06-05 20:43:43,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321537877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:43,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225875181] [2021-06-05 20:43:43,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:43,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:43:43,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:43,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:43,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:44,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225875181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:44,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:44,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:44,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670164632] [2021-06-05 20:43:44,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:44,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:44,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:44,010 INFO L87 Difference]: Start difference. First operand 219 states and 438 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:45,046 INFO L93 Difference]: Finished difference Result 360 states and 710 transitions. [2021-06-05 20:43:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:43:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:45,047 INFO L225 Difference]: With dead ends: 360 [2021-06-05 20:43:45,047 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 20:43:45,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1108.3ms TimeCoverageRelationStatistics Valid=446, Invalid=2634, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:43:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 20:43:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 225. [2021-06-05 20:43:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.03125) internal successors, (455), 224 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 455 transitions. [2021-06-05 20:43:45,052 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 455 transitions. Word has length 21 [2021-06-05 20:43:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:45,052 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 455 transitions. [2021-06-05 20:43:45,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 455 transitions. [2021-06-05 20:43:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:45,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:45,053 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:45,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:45,253 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:45,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1697259851, now seen corresponding path program 399 times [2021-06-05 20:43:45,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:45,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782276583] [2021-06-05 20:43:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:45,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:45,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782276583] [2021-06-05 20:43:45,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782276583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:45,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136334374] [2021-06-05 20:43:45,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:45,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:43:45,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:45,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:45,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136334374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:45,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:45,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:45,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77382037] [2021-06-05 20:43:45,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:45,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:45,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:45,839 INFO L87 Difference]: Start difference. First operand 225 states and 455 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:46,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:46,840 INFO L93 Difference]: Finished difference Result 375 states and 737 transitions. [2021-06-05 20:43:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:43:46,840 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:46,840 INFO L225 Difference]: With dead ends: 375 [2021-06-05 20:43:46,840 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 20:43:46,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1068.0ms TimeCoverageRelationStatistics Valid=504, Invalid=2918, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:43:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 20:43:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 221. [2021-06-05 20:43:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.022727272727273) internal successors, (445), 220 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 445 transitions. [2021-06-05 20:43:46,843 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 445 transitions. Word has length 21 [2021-06-05 20:43:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:46,843 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 445 transitions. [2021-06-05 20:43:46,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 445 transitions. [2021-06-05 20:43:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:46,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:46,843 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:47,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 20:43:47,044 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash 414029493, now seen corresponding path program 400 times [2021-06-05 20:43:47,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:47,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903355414] [2021-06-05 20:43:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:47,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:47,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903355414] [2021-06-05 20:43:47,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903355414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:47,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371256824] [2021-06-05 20:43:47,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:47,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:43:47,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:47,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:47,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371256824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:47,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:47,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:47,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531101479] [2021-06-05 20:43:47,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:47,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:47,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:47,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:47,636 INFO L87 Difference]: Start difference. First operand 221 states and 445 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:48,671 INFO L93 Difference]: Finished difference Result 368 states and 728 transitions. [2021-06-05 20:43:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 20:43:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:48,672 INFO L225 Difference]: With dead ends: 368 [2021-06-05 20:43:48,672 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 20:43:48,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1087.4ms TimeCoverageRelationStatistics Valid=518, Invalid=2788, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:43:48,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 20:43:48,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 215. [2021-06-05 20:43:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.0093457943925235) internal successors, (430), 214 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 430 transitions. [2021-06-05 20:43:48,674 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 430 transitions. Word has length 21 [2021-06-05 20:43:48,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:48,674 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 430 transitions. [2021-06-05 20:43:48,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 430 transitions. [2021-06-05 20:43:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:48,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:48,674 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:48,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 20:43:48,875 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash -387013273, now seen corresponding path program 401 times [2021-06-05 20:43:48,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:48,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795304876] [2021-06-05 20:43:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:49,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795304876] [2021-06-05 20:43:49,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795304876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550013809] [2021-06-05 20:43:49,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:49,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 20:43:49,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:49,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:49,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550013809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:49,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:49,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:49,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026018893] [2021-06-05 20:43:49,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:49,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:49,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:49,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:49,469 INFO L87 Difference]: Start difference. First operand 215 states and 430 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:50,170 INFO L93 Difference]: Finished difference Result 309 states and 607 transitions. [2021-06-05 20:43:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:43:50,170 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:50,170 INFO L225 Difference]: With dead ends: 309 [2021-06-05 20:43:50,170 INFO L226 Difference]: Without dead ends: 306 [2021-06-05 20:43:50,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 798.6ms TimeCoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:43:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-05 20:43:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 213. [2021-06-05 20:43:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.009433962264151) internal successors, (426), 212 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 426 transitions. [2021-06-05 20:43:50,173 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 426 transitions. Word has length 21 [2021-06-05 20:43:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:50,173 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 426 transitions. [2021-06-05 20:43:50,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 426 transitions. [2021-06-05 20:43:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:50,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:50,173 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:50,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 20:43:50,373 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:50,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1498976925, now seen corresponding path program 402 times [2021-06-05 20:43:50,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:50,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273182191] [2021-06-05 20:43:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:50,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:50,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273182191] [2021-06-05 20:43:50,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273182191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:50,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906140843] [2021-06-05 20:43:50,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:50,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:43:50,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:50,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:50,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:50,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906140843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:50,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:50,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:50,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010435817] [2021-06-05 20:43:50,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:50,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:50,973 INFO L87 Difference]: Start difference. First operand 213 states and 426 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:51,979 INFO L93 Difference]: Finished difference Result 363 states and 712 transitions. [2021-06-05 20:43:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:43:51,980 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:51,980 INFO L225 Difference]: With dead ends: 363 [2021-06-05 20:43:51,980 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 20:43:51,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1000.0ms TimeCoverageRelationStatistics Valid=408, Invalid=2562, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:43:51,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 20:43:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 219. [2021-06-05 20:43:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.032110091743119) internal successors, (443), 218 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 443 transitions. [2021-06-05 20:43:51,982 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 443 transitions. Word has length 21 [2021-06-05 20:43:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:51,983 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 443 transitions. [2021-06-05 20:43:51,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 443 transitions. [2021-06-05 20:43:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:51,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:51,983 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:52,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 20:43:52,183 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1506299745, now seen corresponding path program 403 times [2021-06-05 20:43:52,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:52,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585355104] [2021-06-05 20:43:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:52,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:52,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585355104] [2021-06-05 20:43:52,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585355104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:52,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636249323] [2021-06-05 20:43:52,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:52,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:52,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:52,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636249323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:52,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:52,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:52,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924701093] [2021-06-05 20:43:52,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:52,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:52,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:52,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:52,772 INFO L87 Difference]: Start difference. First operand 219 states and 443 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:53,840 INFO L93 Difference]: Finished difference Result 378 states and 739 transitions. [2021-06-05 20:43:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:43:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:53,841 INFO L225 Difference]: With dead ends: 378 [2021-06-05 20:43:53,841 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 20:43:53,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1008.2ms TimeCoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:43:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 20:43:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 215. [2021-06-05 20:43:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.0233644859813085) internal successors, (433), 214 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 433 transitions. [2021-06-05 20:43:53,843 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 433 transitions. Word has length 21 [2021-06-05 20:43:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:53,844 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 433 transitions. [2021-06-05 20:43:53,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 433 transitions. [2021-06-05 20:43:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:53,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:53,844 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:54,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 20:43:54,044 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:54,045 INFO L82 PathProgramCache]: Analyzing trace with hash 604989599, now seen corresponding path program 404 times [2021-06-05 20:43:54,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:54,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187897630] [2021-06-05 20:43:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:54,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:54,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187897630] [2021-06-05 20:43:54,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187897630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:54,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466209583] [2021-06-05 20:43:54,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:54,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:43:54,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:54,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:54,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:54,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466209583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:54,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:54,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:54,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233985191] [2021-06-05 20:43:54,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:54,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:54,641 INFO L87 Difference]: Start difference. First operand 215 states and 433 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:55,766 INFO L93 Difference]: Finished difference Result 364 states and 719 transitions. [2021-06-05 20:43:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:43:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:55,767 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:43:55,767 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 20:43:55,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1073.1ms TimeCoverageRelationStatistics Valid=480, Invalid=2712, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:43:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 20:43:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 212. [2021-06-05 20:43:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.004739336492891) internal successors, (423), 211 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 423 transitions. [2021-06-05 20:43:55,769 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 423 transitions. Word has length 21 [2021-06-05 20:43:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:55,769 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 423 transitions. [2021-06-05 20:43:55,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 423 transitions. [2021-06-05 20:43:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:55,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:55,770 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:55,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:55,970 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1116256537, now seen corresponding path program 405 times [2021-06-05 20:43:55,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:55,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386261217] [2021-06-05 20:43:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:56,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:56,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386261217] [2021-06-05 20:43:56,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386261217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:56,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051278288] [2021-06-05 20:43:56,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:56,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:43:56,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:56,165 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:56,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051278288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:56,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:56,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:56,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984519480] [2021-06-05 20:43:56,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:56,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:56,563 INFO L87 Difference]: Start difference. First operand 212 states and 423 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:57,441 INFO L93 Difference]: Finished difference Result 349 states and 687 transitions. [2021-06-05 20:43:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:43:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:57,441 INFO L225 Difference]: With dead ends: 349 [2021-06-05 20:43:57,441 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 20:43:57,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 897.5ms TimeCoverageRelationStatistics Valid=355, Invalid=2297, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:43:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 20:43:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 217. [2021-06-05 20:43:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0277777777777777) internal successors, (438), 216 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 438 transitions. [2021-06-05 20:43:57,444 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 438 transitions. Word has length 21 [2021-06-05 20:43:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:57,444 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 438 transitions. [2021-06-05 20:43:57,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 438 transitions. [2021-06-05 20:43:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:57,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:57,444 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:57,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 20:43:57,645 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:57,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1123579357, now seen corresponding path program 406 times [2021-06-05 20:43:57,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:57,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569107624] [2021-06-05 20:43:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:57,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:57,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569107624] [2021-06-05 20:43:57,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569107624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:57,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863281411] [2021-06-05 20:43:57,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:57,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:43:57,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:57,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:43:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:58,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863281411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:58,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:43:58,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:43:58,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396706805] [2021-06-05 20:43:58,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:43:58,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:43:58,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:43:58,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:43:58,246 INFO L87 Difference]: Start difference. First operand 217 states and 438 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:43:59,221 INFO L93 Difference]: Finished difference Result 364 states and 714 transitions. [2021-06-05 20:43:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:43:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:43:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:43:59,221 INFO L225 Difference]: With dead ends: 364 [2021-06-05 20:43:59,222 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 20:43:59,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 951.5ms TimeCoverageRelationStatistics Valid=414, Invalid=2556, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:43:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 20:43:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 215. [2021-06-05 20:43:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.0186915887850465) internal successors, (432), 214 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 432 transitions. [2021-06-05 20:43:59,224 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 432 transitions. Word has length 21 [2021-06-05 20:43:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:43:59,224 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 432 transitions. [2021-06-05 20:43:59,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:43:59,224 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 432 transitions. [2021-06-05 20:43:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:43:59,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:43:59,224 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:43:59,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 20:43:59,425 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:43:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:43:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash 987709987, now seen corresponding path program 407 times [2021-06-05 20:43:59,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:43:59,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743711282] [2021-06-05 20:43:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:43:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:43:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:43:59,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:43:59,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743711282] [2021-06-05 20:43:59,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743711282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:43:59,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608992092] [2021-06-05 20:43:59,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:43:59,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:43:59,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:43:59,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:43:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:44:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:44:00,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608992092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:44:00,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:44:00,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:44:00,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518453232] [2021-06-05 20:44:00,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:44:00,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:44:00,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:44:00,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:44:00,231 INFO L87 Difference]: Start difference. First operand 215 states and 432 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:44:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:44:02,009 INFO L93 Difference]: Finished difference Result 373 states and 737 transitions. [2021-06-05 20:44:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:44:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:44:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:44:02,009 INFO L225 Difference]: With dead ends: 373 [2021-06-05 20:44:02,009 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 20:44:02,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1507.6ms TimeCoverageRelationStatistics Valid=523, Invalid=3017, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:44:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 20:44:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 213. [2021-06-05 20:44:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.0047169811320753) internal successors, (425), 212 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:44:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 425 transitions. [2021-06-05 20:44:02,013 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 425 transitions. Word has length 21 [2021-06-05 20:44:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:44:02,013 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 425 transitions. [2021-06-05 20:44:02,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:44:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 425 transitions. [2021-06-05 20:44:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:44:02,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:44:02,013 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:44:02,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:44:02,229 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:44:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:44:02,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2034206727, now seen corresponding path program 408 times [2021-06-05 20:44:02,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:44:02,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557270529] [2021-06-05 20:44:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:44:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:44:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:44:02,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:44:02,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557270529] [2021-06-05 20:44:02,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557270529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:44:02,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940092117] [2021-06-05 20:44:02,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:44:02,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:44:02,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:44:02,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:44:02,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:44:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:44:03,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940092117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:44:03,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:44:03,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 20:44:03,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859422568] [2021-06-05 20:44:03,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 20:44:03,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:44:03,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 20:44:03,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:44:03,030 INFO L87 Difference]: Start difference. First operand 213 states and 425 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:44:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:44:04,371 INFO L93 Difference]: Finished difference Result 353 states and 695 transitions. [2021-06-05 20:44:04,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:44:04,371 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:44:04,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:44:04,372 INFO L225 Difference]: With dead ends: 353 [2021-06-05 20:44:04,372 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 20:44:04,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1318.5ms TimeCoverageRelationStatistics Valid=409, Invalid=2561, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:44:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 20:44:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 219. [2021-06-05 20:44:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.0275229357798166) internal successors, (442), 218 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:44:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 442 transitions. [2021-06-05 20:44:04,375 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 442 transitions. Word has length 21 [2021-06-05 20:44:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:44:04,375 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 442 transitions. [2021-06-05 20:44:04,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:44:04,375 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 442 transitions. [2021-06-05 20:44:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:44:04,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:44:04,376 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:44:04,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:44:04,593 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:44:04,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:44:04,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2041529547, now seen corresponding path program 409 times [2021-06-05 20:44:04,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:44:04,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603216341] [2021-06-05 20:44:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:44:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:44:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:44:04,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:44:04,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603216341] [2021-06-05 20:44:04,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603216341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:44:04,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599718147] [2021-06-05 20:44:04,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Received shutdown request... Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:44:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:44:04,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 20:44:04,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:44:05,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,461 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:44:05,066 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 20:44:05,067 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 20:44:05,068 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 20:44:05,069 INFO L202 PluginConnector]: Adding new model concurrent_mult.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 08:44:05 BasicIcfg [2021-06-05 20:44:05,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 20:44:05,069 INFO L168 Benchmark]: Toolchain (without parser) took 796433.65 ms. Allocated memory was 348.1 MB in the beginning and 419.4 MB in the end (delta: 71.3 MB). Free memory was 327.4 MB in the beginning and 232.4 MB in the end (delta: 95.0 MB). Peak memory consumption was 168.3 MB. Max. memory is 16.0 GB. [2021-06-05 20:44:05,069 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.42 ms. Allocated memory is still 348.1 MB. Free memory was 328.4 MB in the beginning and 328.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:44:05,069 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.79 ms. Allocated memory is still 348.1 MB. Free memory was 327.3 MB in the beginning and 325.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 20:44:05,069 INFO L168 Benchmark]: Boogie Preprocessor took 15.05 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 325.0 MB in the end (delta: 893.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 20:44:05,069 INFO L168 Benchmark]: RCFGBuilder took 171.78 ms. Allocated memory is still 348.1 MB. Free memory was 324.9 MB in the beginning and 315.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 20:44:05,069 INFO L168 Benchmark]: TraceAbstraction took 796218.27 ms. Allocated memory was 348.1 MB in the beginning and 419.4 MB in the end (delta: 71.3 MB). Free memory was 314.9 MB in the beginning and 232.4 MB in the end (delta: 82.5 MB). Peak memory consumption was 155.7 MB. Max. memory is 16.0 GB. [2021-06-05 20:44:05,070 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.42 ms. Allocated memory is still 348.1 MB. Free memory was 328.4 MB in the beginning and 328.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.79 ms. Allocated memory is still 348.1 MB. Free memory was 327.3 MB in the beginning and 325.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.05 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 325.0 MB in the end (delta: 893.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 171.78 ms. Allocated memory is still 348.1 MB. Free memory was 324.9 MB in the beginning and 315.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 796218.27 ms. Allocated memory was 348.1 MB in the beginning and 419.4 MB in the end (delta: 71.3 MB). Free memory was 314.9 MB in the beginning and 232.4 MB in the end (delta: 82.5 MB). Peak memory consumption was 155.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 18 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 4 procedures, 33 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 796132.9ms, OverallIterations: 463, TraceHistogramMax: 2, EmptinessCheckTime: 144.3ms, AutomataDifference: 437687.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18187 SDtfs, 82101 SDslu, 185345 SDs, 0 SdLazy, 521356 SolverSat, 9278 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 168720.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26095 GetRequests, 2559 SyntacticMatches, 0 SemanticMatches, 23536 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252789 ImplicationChecksByTransitivity, 447921.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=254occurred in iteration=384, InterpolantAutomatonStates: 11537, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1314.4ms AutomataMinimizationTime, 462 MinimizatonAttempts, 70618 StatesRemovedByMinimization, 462 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 959.4ms SsaConstructionTime, 2925.9ms SatisfiabilityAnalysisTime, 251177.2ms InterpolantComputationTime, 19089 NumberOfCodeBlocks, 19089 NumberOfCodeBlocksAsserted, 1297 NumberOfCheckSat, 18168 ConstructedInterpolants, 0 QuantifiedInterpolants, 245352 SizeOfPredicates, 4386 NumberOfNonLiveVariables, 23214 ConjunctsInSsa, 13539 ConjunctsInUnsatCore, 921 InterpolantComputations, 3 PerfectInterpolantSequences, 0/1830 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown