/usr/bin/java -Xmx8000000000 -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/POPL2022/add-sub05.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8b99979fc9bd30b823d307a67cb055caa4790482-8b99979 [2021-06-30 11:47:31,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-30 11:47:31,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-30 11:47:31,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-30 11:47:31,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-30 11:47:31,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-30 11:47:31,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-30 11:47:31,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-30 11:47:31,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-30 11:47:31,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-30 11:47:31,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-30 11:47:31,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-30 11:47:31,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-30 11:47:31,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-30 11:47:31,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-30 11:47:31,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-30 11:47:31,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-30 11:47:31,439 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 [2021-06-30 11:47:31,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-30 11:47:31,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-30 11:47:31,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-30 11:47:31,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-30 11:47:31,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-30 11:47:31,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-30 11:47:31,462 INFO L138 SettingsManager]: * Use SBE=true [2021-06-30 11:47:31,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-30 11:47:31,462 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-30 11:47:31,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-30 11:47:31,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-30 11:47:31,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-30 11:47:31,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-30 11:47:31,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-30 11:47:31,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-30 11:47:31,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-30 11:47:31,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-30 11:47:31,464 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-30 11:47:31,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-30 11:47:31,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-30 11:47:31,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-30 11:47:31,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-30 11:47:31,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-30 11:47:31,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-30 11:47:31,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-30 11:47:31,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-30 11:47:31,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-30 11:47:31,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-30 11:47:31,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-30 11:47:31,465 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-30 11:47:31,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-30 11:47:31,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-30 11:47:31,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-30 11:47:31,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-30 11:47:31,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-30 11:47:31,747 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-30 11:47:31,748 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-30 11:47:31,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub05.bpl [2021-06-30 11:47:31,749 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub05.bpl' [2021-06-30 11:47:31,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-30 11:47:31,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-30 11:47:31,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-30 11:47:31,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-30 11:47:31,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-30 11:47:31,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-30 11:47:31,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-30 11:47:31,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-30 11:47:31,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-30 11:47:31,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-30 11:47:31,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-30 11:47:31,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-30 11:47:31,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-30 11:47:31,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (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 [2021-06-30 11:47:31,893 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-30 11:47:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-30 11:47:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-30 11:47:31,894 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-06-30 11:47:31,894 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-06-30 11:47:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-06-30 11:47:31,895 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-30 11:47:32,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-30 11:47:32,038 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-30 11:47:32,040 INFO L202 PluginConnector]: Adding new model add-sub05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:47:32 BoogieIcfgContainer [2021-06-30 11:47:32,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-30 11:47:32,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-30 11:47:32,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-30 11:47:32,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-30 11:47:32,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/2) ... [2021-06-30 11:47:32,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c242d58 and model type add-sub05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.06 11:47:32, skipping insertion in model container [2021-06-30 11:47:32,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:47:32" (2/2) ... [2021-06-30 11:47:32,054 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub05.bpl [2021-06-30 11:47:32,063 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-30 11:47:32,064 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-30 11:47:32,065 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-30 11:47:32,065 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-30 11:47:32,138 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,138 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,138 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,139 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,139 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,139 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,140 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,140 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,140 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,140 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,140 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,141 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,141 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,141 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,141 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,142 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,142 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,142 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,142 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,142 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,143 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,143 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,143 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,143 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,144 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,144 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,144 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,144 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,145 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,145 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,147 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,150 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,153 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,155 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,158 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,171 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-06-30 11:47:32,190 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-30 11:47:32,208 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-30 11:47:32,209 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-30 11:47:32,209 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-30 11:47:32,209 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-30 11:47:32,209 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-30 11:47:32,209 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-30 11:47:32,209 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-30 11:47:32,209 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-30 11:47:32,237 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 39 transitions, 118 flow [2021-06-30 11:47:32,459 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1710 states, 1707 states have (on average 4.867018160515524) internal successors, (8308), 1707 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 1710 states, 1707 states have (on average 4.867018160515524) internal successors, (8308), 1707 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:47:32,502 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:32,503 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:32,503 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash -270209647, now seen corresponding path program 1 times [2021-06-30 11:47:32,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:32,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360338766] [2021-06-30 11:47:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:32,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:32,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360338766] [2021-06-30 11:47:32,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360338766] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:32,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:32,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-30 11:47:32,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047801413] [2021-06-30 11:47:32,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-30 11:47:32,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:32,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-30 11:47:32,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:47:32,747 INFO L87 Difference]: Start difference. First operand has 1710 states, 1707 states have (on average 4.867018160515524) internal successors, (8308), 1707 states have internal predecessors, (8308), 0 states have call successors, (0), 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 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:32,876 INFO L93 Difference]: Finished difference Result 2192 states and 10616 transitions. [2021-06-30 11:47:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-30 11:47:32,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-30 11:47:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:32,924 INFO L225 Difference]: With dead ends: 2192 [2021-06-30 11:47:32,924 INFO L226 Difference]: Without dead ends: 2186 [2021-06-30 11:47:32,926 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:47:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-06-30 11:47:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1795. [2021-06-30 11:47:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 4.852285395763657) internal successors, (8705), 1794 states have internal predecessors, (8705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 8705 transitions. [2021-06-30 11:47:33,095 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 8705 transitions. Word has length 17 [2021-06-30 11:47:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:33,096 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 8705 transitions. [2021-06-30 11:47:33,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 8705 transitions. [2021-06-30 11:47:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:33,105 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:33,105 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:33,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-30 11:47:33,106 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:33,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1416358559, now seen corresponding path program 1 times [2021-06-30 11:47:33,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:33,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338424003] [2021-06-30 11:47:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:33,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338424003] [2021-06-30 11:47:33,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338424003] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:33,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:33,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:33,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489320228] [2021-06-30 11:47:33,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:33,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:33,187 INFO L87 Difference]: Start difference. First operand 1795 states and 8705 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:33,309 INFO L93 Difference]: Finished difference Result 2396 states and 11592 transitions. [2021-06-30 11:47:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:33,334 INFO L225 Difference]: With dead ends: 2396 [2021-06-30 11:47:33,335 INFO L226 Difference]: Without dead ends: 2386 [2021-06-30 11:47:33,336 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:33,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-06-30 11:47:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1850. [2021-06-30 11:47:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 4.8512709572742025) internal successors, (8970), 1849 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 8970 transitions. [2021-06-30 11:47:33,461 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 8970 transitions. Word has length 20 [2021-06-30 11:47:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:33,462 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 8970 transitions. [2021-06-30 11:47:33,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 8970 transitions. [2021-06-30 11:47:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:33,475 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:33,475 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:33,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-30 11:47:33,481 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:33,482 INFO L82 PathProgramCache]: Analyzing trace with hash 115348459, now seen corresponding path program 1 times [2021-06-30 11:47:33,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:33,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120823633] [2021-06-30 11:47:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:33,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:33,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120823633] [2021-06-30 11:47:33,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120823633] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:33,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:33,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:33,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690740695] [2021-06-30 11:47:33,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:33,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:33,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:33,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:33,597 INFO L87 Difference]: Start difference. First operand 1850 states and 8970 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:33,670 INFO L93 Difference]: Finished difference Result 2594 states and 12532 transitions. [2021-06-30 11:47:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:33,693 INFO L225 Difference]: With dead ends: 2594 [2021-06-30 11:47:33,693 INFO L226 Difference]: Without dead ends: 2576 [2021-06-30 11:47:33,694 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-30 11:47:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1995. [2021-06-30 11:47:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 4.873620862587764) internal successors, (9718), 1994 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 9718 transitions. [2021-06-30 11:47:33,824 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 9718 transitions. Word has length 20 [2021-06-30 11:47:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:33,825 INFO L482 AbstractCegarLoop]: Abstraction has 1995 states and 9718 transitions. [2021-06-30 11:47:33,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 9718 transitions. [2021-06-30 11:47:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:33,851 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:33,851 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:33,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-30 11:47:33,852 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash -742805575, now seen corresponding path program 1 times [2021-06-30 11:47:33,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:33,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541776725] [2021-06-30 11:47:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:33,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:33,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541776725] [2021-06-30 11:47:33,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541776725] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:33,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783886980] [2021-06-30 11:47:33,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:33,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:33,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:33,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:33,944 INFO L87 Difference]: Start difference. First operand 1995 states and 9718 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:34,055 INFO L93 Difference]: Finished difference Result 2753 states and 13325 transitions. [2021-06-30 11:47:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:34,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:34,081 INFO L225 Difference]: With dead ends: 2753 [2021-06-30 11:47:34,081 INFO L226 Difference]: Without dead ends: 2739 [2021-06-30 11:47:34,082 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2021-06-30 11:47:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2129. [2021-06-30 11:47:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 4.8956766917293235) internal successors, (10418), 2128 states have internal predecessors, (10418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 10418 transitions. [2021-06-30 11:47:34,202 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 10418 transitions. Word has length 20 [2021-06-30 11:47:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:34,203 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 10418 transitions. [2021-06-30 11:47:34,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 10418 transitions. [2021-06-30 11:47:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:34,213 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:34,213 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:34,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-30 11:47:34,213 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:34,214 INFO L82 PathProgramCache]: Analyzing trace with hash -864134487, now seen corresponding path program 1 times [2021-06-30 11:47:34,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:34,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380089704] [2021-06-30 11:47:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:34,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380089704] [2021-06-30 11:47:34,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380089704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:34,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:34,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:34,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787050094] [2021-06-30 11:47:34,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:34,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:34,287 INFO L87 Difference]: Start difference. First operand 2129 states and 10418 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:34,378 INFO L93 Difference]: Finished difference Result 2809 states and 13646 transitions. [2021-06-30 11:47:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:34,403 INFO L225 Difference]: With dead ends: 2809 [2021-06-30 11:47:34,403 INFO L226 Difference]: Without dead ends: 2782 [2021-06-30 11:47:34,404 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2021-06-30 11:47:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 2232. [2021-06-30 11:47:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 4.894666069027342) internal successors, (10920), 2231 states have internal predecessors, (10920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 10920 transitions. [2021-06-30 11:47:34,541 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 10920 transitions. Word has length 20 [2021-06-30 11:47:34,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:34,542 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 10920 transitions. [2021-06-30 11:47:34,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 10920 transitions. [2021-06-30 11:47:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:34,552 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:34,552 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:34,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-30 11:47:34,552 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:34,554 INFO L82 PathProgramCache]: Analyzing trace with hash -684904411, now seen corresponding path program 1 times [2021-06-30 11:47:34,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:34,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053499907] [2021-06-30 11:47:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:34,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053499907] [2021-06-30 11:47:34,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053499907] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:34,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:34,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:34,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481424293] [2021-06-30 11:47:34,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:34,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:34,638 INFO L87 Difference]: Start difference. First operand 2232 states and 10920 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:34,699 INFO L93 Difference]: Finished difference Result 2975 states and 14495 transitions. [2021-06-30 11:47:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:34,715 INFO L225 Difference]: With dead ends: 2975 [2021-06-30 11:47:34,715 INFO L226 Difference]: Without dead ends: 2953 [2021-06-30 11:47:34,715 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:34,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-06-30 11:47:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2346. [2021-06-30 11:47:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 4.899786780383796) internal successors, (11490), 2345 states have internal predecessors, (11490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 11490 transitions. [2021-06-30 11:47:34,871 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 11490 transitions. Word has length 20 [2021-06-30 11:47:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:34,871 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 11490 transitions. [2021-06-30 11:47:34,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 11490 transitions. [2021-06-30 11:47:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:34,880 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:34,881 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:34,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-30 11:47:34,881 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:34,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:34,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1519491059, now seen corresponding path program 1 times [2021-06-30 11:47:34,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:34,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407432527] [2021-06-30 11:47:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:34,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407432527] [2021-06-30 11:47:34,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407432527] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:34,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:34,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:34,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226971588] [2021-06-30 11:47:34,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:34,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:34,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:34,935 INFO L87 Difference]: Start difference. First operand 2346 states and 11490 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:35,014 INFO L93 Difference]: Finished difference Result 3161 states and 15375 transitions. [2021-06-30 11:47:35,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:35,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:35,030 INFO L225 Difference]: With dead ends: 3161 [2021-06-30 11:47:35,030 INFO L226 Difference]: Without dead ends: 3152 [2021-06-30 11:47:35,031 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-06-30 11:47:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2416. [2021-06-30 11:47:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 4.909730848861284) internal successors, (11857), 2415 states have internal predecessors, (11857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 11857 transitions. [2021-06-30 11:47:35,180 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 11857 transitions. Word has length 23 [2021-06-30 11:47:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:35,181 INFO L482 AbstractCegarLoop]: Abstraction has 2416 states and 11857 transitions. [2021-06-30 11:47:35,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 11857 transitions. [2021-06-30 11:47:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:35,189 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:35,189 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:35,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-30 11:47:35,189 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:35,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1868772791, now seen corresponding path program 2 times [2021-06-30 11:47:35,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:35,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751902796] [2021-06-30 11:47:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:35,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:35,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751902796] [2021-06-30 11:47:35,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751902796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:35,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927519850] [2021-06-30 11:47:35,293 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 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 [2021-06-30 11:47:35,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:35,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:35,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:35,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:35,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927519850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:35,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:35,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:35,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858464593] [2021-06-30 11:47:35,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:35,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:35,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:35,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:35,471 INFO L87 Difference]: Start difference. First operand 2416 states and 11857 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:35,603 INFO L93 Difference]: Finished difference Result 3354 states and 16337 transitions. [2021-06-30 11:47:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:35,621 INFO L225 Difference]: With dead ends: 3354 [2021-06-30 11:47:35,621 INFO L226 Difference]: Without dead ends: 3311 [2021-06-30 11:47:35,622 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-30 11:47:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2372. [2021-06-30 11:47:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 4.878954027836356) internal successors, (11568), 2371 states have internal predecessors, (11568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 11568 transitions. [2021-06-30 11:47:35,762 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 11568 transitions. Word has length 23 [2021-06-30 11:47:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:35,762 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 11568 transitions. [2021-06-30 11:47:35,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 11568 transitions. [2021-06-30 11:47:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:35,775 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:35,775 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:35,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-30 11:47:35,989 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1990729223, now seen corresponding path program 1 times [2021-06-30 11:47:35,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:35,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302530703] [2021-06-30 11:47:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:36,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:36,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302530703] [2021-06-30 11:47:36,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302530703] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:36,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:36,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:36,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878450019] [2021-06-30 11:47:36,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:36,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:36,107 INFO L87 Difference]: Start difference. First operand 2372 states and 11568 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:36,226 INFO L93 Difference]: Finished difference Result 3299 states and 16020 transitions. [2021-06-30 11:47:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:36,244 INFO L225 Difference]: With dead ends: 3299 [2021-06-30 11:47:36,244 INFO L226 Difference]: Without dead ends: 3290 [2021-06-30 11:47:36,245 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-06-30 11:47:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2542. [2021-06-30 11:47:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2541 states have (on average 4.925226288862652) internal successors, (12515), 2541 states have internal predecessors, (12515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 12515 transitions. [2021-06-30 11:47:36,366 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 12515 transitions. Word has length 23 [2021-06-30 11:47:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:36,366 INFO L482 AbstractCegarLoop]: Abstraction has 2542 states and 12515 transitions. [2021-06-30 11:47:36,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 12515 transitions. [2021-06-30 11:47:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:36,374 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:36,374 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:36,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-30 11:47:36,374 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:36,375 INFO L82 PathProgramCache]: Analyzing trace with hash 17806155, now seen corresponding path program 2 times [2021-06-30 11:47:36,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:36,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530478523] [2021-06-30 11:47:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:36,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530478523] [2021-06-30 11:47:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530478523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664781327] [2021-06-30 11:47:36,441 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 [2021-06-30 11:47:36,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:36,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:36,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:36,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:36,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664781327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:36,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:36,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:36,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800910557] [2021-06-30 11:47:36,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:36,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:36,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:36,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:36,561 INFO L87 Difference]: Start difference. First operand 2542 states and 12515 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:36,753 INFO L93 Difference]: Finished difference Result 3547 states and 17322 transitions. [2021-06-30 11:47:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:36,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:36,813 INFO L225 Difference]: With dead ends: 3547 [2021-06-30 11:47:36,813 INFO L226 Difference]: Without dead ends: 3508 [2021-06-30 11:47:36,814 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-06-30 11:47:36,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 2482. [2021-06-30 11:47:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 4.9173720274083035) internal successors, (12200), 2481 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 12200 transitions. [2021-06-30 11:47:36,936 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 12200 transitions. Word has length 23 [2021-06-30 11:47:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:36,936 INFO L482 AbstractCegarLoop]: Abstraction has 2482 states and 12200 transitions. [2021-06-30 11:47:36,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 12200 transitions. [2021-06-30 11:47:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:36,944 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:36,944 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:37,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-30 11:47:37,161 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1159242185, now seen corresponding path program 1 times [2021-06-30 11:47:37,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:37,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618964884] [2021-06-30 11:47:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:37,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:37,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618964884] [2021-06-30 11:47:37,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618964884] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:37,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:37,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:37,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431026639] [2021-06-30 11:47:37,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:37,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:37,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:37,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:37,216 INFO L87 Difference]: Start difference. First operand 2482 states and 12200 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:37,300 INFO L93 Difference]: Finished difference Result 3278 states and 16000 transitions. [2021-06-30 11:47:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:37,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:37,318 INFO L225 Difference]: With dead ends: 3278 [2021-06-30 11:47:37,318 INFO L226 Difference]: Without dead ends: 3269 [2021-06-30 11:47:37,318 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-06-30 11:47:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2593. [2021-06-30 11:47:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 4.940586419753086) internal successors, (12806), 2592 states have internal predecessors, (12806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 12806 transitions. [2021-06-30 11:47:37,432 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 12806 transitions. Word has length 23 [2021-06-30 11:47:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:37,432 INFO L482 AbstractCegarLoop]: Abstraction has 2593 states and 12806 transitions. [2021-06-30 11:47:37,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 12806 transitions. [2021-06-30 11:47:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:37,440 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:37,440 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:37,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-30 11:47:37,440 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2127212411, now seen corresponding path program 2 times [2021-06-30 11:47:37,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:37,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019024430] [2021-06-30 11:47:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:37,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:37,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019024430] [2021-06-30 11:47:37,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019024430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:37,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435403121] [2021-06-30 11:47:37,496 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 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 [2021-06-30 11:47:37,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:37,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435403121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:37,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:37,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:37,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438315205] [2021-06-30 11:47:37,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:37,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:37,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:37,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:37,646 INFO L87 Difference]: Start difference. First operand 2593 states and 12806 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:37,780 INFO L93 Difference]: Finished difference Result 3479 states and 17028 transitions. [2021-06-30 11:47:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:37,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:37,799 INFO L225 Difference]: With dead ends: 3479 [2021-06-30 11:47:37,799 INFO L226 Difference]: Without dead ends: 3423 [2021-06-30 11:47:37,800 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2021-06-30 11:47:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 2559. [2021-06-30 11:47:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2558 states have (on average 4.91790461297889) internal successors, (12580), 2558 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 12580 transitions. [2021-06-30 11:47:37,925 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 12580 transitions. Word has length 23 [2021-06-30 11:47:37,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:37,925 INFO L482 AbstractCegarLoop]: Abstraction has 2559 states and 12580 transitions. [2021-06-30 11:47:37,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 12580 transitions. [2021-06-30 11:47:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:37,933 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:37,933 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:38,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-30 11:47:38,149 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:38,150 INFO L82 PathProgramCache]: Analyzing trace with hash 608005073, now seen corresponding path program 1 times [2021-06-30 11:47:38,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:38,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122424615] [2021-06-30 11:47:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:38,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:38,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122424615] [2021-06-30 11:47:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122424615] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:38,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:38,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:38,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298853848] [2021-06-30 11:47:38,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:38,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:38,189 INFO L87 Difference]: Start difference. First operand 2559 states and 12580 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:38,274 INFO L93 Difference]: Finished difference Result 3472 states and 16953 transitions. [2021-06-30 11:47:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:38,290 INFO L225 Difference]: With dead ends: 3472 [2021-06-30 11:47:38,291 INFO L226 Difference]: Without dead ends: 3446 [2021-06-30 11:47:38,291 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-30 11:47:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2583. [2021-06-30 11:47:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 2582 states have (on average 4.924089852827266) internal successors, (12714), 2582 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 12714 transitions. [2021-06-30 11:47:38,412 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 12714 transitions. Word has length 23 [2021-06-30 11:47:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:38,412 INFO L482 AbstractCegarLoop]: Abstraction has 2583 states and 12714 transitions. [2021-06-30 11:47:38,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 12714 transitions. [2021-06-30 11:47:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:38,420 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:38,420 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:38,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-30 11:47:38,420 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:38,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:38,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1801010415, now seen corresponding path program 2 times [2021-06-30 11:47:38,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:38,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293964567] [2021-06-30 11:47:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:38,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:38,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293964567] [2021-06-30 11:47:38,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293964567] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:38,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:38,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:38,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28711565] [2021-06-30 11:47:38,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:38,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:38,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:38,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:38,468 INFO L87 Difference]: Start difference. First operand 2583 states and 12714 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:38,558 INFO L93 Difference]: Finished difference Result 3401 states and 16696 transitions. [2021-06-30 11:47:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:38,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:38,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:38,573 INFO L225 Difference]: With dead ends: 3401 [2021-06-30 11:47:38,574 INFO L226 Difference]: Without dead ends: 3392 [2021-06-30 11:47:38,574 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-06-30 11:47:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 2709. [2021-06-30 11:47:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 4.9527326440177255) internal successors, (13412), 2708 states have internal predecessors, (13412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 13412 transitions. [2021-06-30 11:47:38,699 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 13412 transitions. Word has length 23 [2021-06-30 11:47:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:38,700 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 13412 transitions. [2021-06-30 11:47:38,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 13412 transitions. [2021-06-30 11:47:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:38,708 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:38,708 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:38,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-30 11:47:38,709 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1144244651, now seen corresponding path program 3 times [2021-06-30 11:47:38,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:38,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483355482] [2021-06-30 11:47:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:38,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:38,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483355482] [2021-06-30 11:47:38,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483355482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:38,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8506145] [2021-06-30 11:47:38,773 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 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 [2021-06-30 11:47:38,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:38,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:38,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:38,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:38,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8506145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:38,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:38,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:38,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089703723] [2021-06-30 11:47:38,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:38,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:38,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:38,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:38,883 INFO L87 Difference]: Start difference. First operand 2709 states and 13412 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:39,040 INFO L93 Difference]: Finished difference Result 3683 states and 18089 transitions. [2021-06-30 11:47:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:39,056 INFO L225 Difference]: With dead ends: 3683 [2021-06-30 11:47:39,057 INFO L226 Difference]: Without dead ends: 3628 [2021-06-30 11:47:39,057 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3628 states. [2021-06-30 11:47:39,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3628 to 2586. [2021-06-30 11:47:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 4.920696324951644) internal successors, (12720), 2585 states have internal predecessors, (12720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 12720 transitions. [2021-06-30 11:47:39,166 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 12720 transitions. Word has length 23 [2021-06-30 11:47:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:39,167 INFO L482 AbstractCegarLoop]: Abstraction has 2586 states and 12720 transitions. [2021-06-30 11:47:39,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 12720 transitions. [2021-06-30 11:47:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:39,174 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:39,174 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:39,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:39,400 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:39,400 INFO L82 PathProgramCache]: Analyzing trace with hash 676180767, now seen corresponding path program 1 times [2021-06-30 11:47:39,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:39,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663366966] [2021-06-30 11:47:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:39,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:39,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663366966] [2021-06-30 11:47:39,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663366966] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:39,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:39,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:39,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920206411] [2021-06-30 11:47:39,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:39,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:39,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:39,451 INFO L87 Difference]: Start difference. First operand 2586 states and 12720 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:39,529 INFO L93 Difference]: Finished difference Result 3901 states and 19085 transitions. [2021-06-30 11:47:39,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:39,544 INFO L225 Difference]: With dead ends: 3901 [2021-06-30 11:47:39,544 INFO L226 Difference]: Without dead ends: 3875 [2021-06-30 11:47:39,545 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-06-30 11:47:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2863. [2021-06-30 11:47:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 4.989867225716282) internal successors, (14281), 2862 states have internal predecessors, (14281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 14281 transitions. [2021-06-30 11:47:39,659 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 14281 transitions. Word has length 23 [2021-06-30 11:47:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:39,659 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 14281 transitions. [2021-06-30 11:47:39,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 14281 transitions. [2021-06-30 11:47:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:39,665 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:39,665 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:39,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-30 11:47:39,665 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash 554851855, now seen corresponding path program 1 times [2021-06-30 11:47:39,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:39,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570531542] [2021-06-30 11:47:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:39,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:39,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570531542] [2021-06-30 11:47:39,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570531542] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:39,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:39,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:39,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724275731] [2021-06-30 11:47:39,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:39,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:39,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:39,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:39,705 INFO L87 Difference]: Start difference. First operand 2863 states and 14281 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:39,792 INFO L93 Difference]: Finished difference Result 4015 states and 19792 transitions. [2021-06-30 11:47:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:39,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:39,808 INFO L225 Difference]: With dead ends: 4015 [2021-06-30 11:47:39,808 INFO L226 Difference]: Without dead ends: 3976 [2021-06-30 11:47:39,808 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-30 11:47:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3074. [2021-06-30 11:47:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 3073 states have (on average 5.0165961601041325) internal successors, (15416), 3073 states have internal predecessors, (15416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 15416 transitions. [2021-06-30 11:47:39,934 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 15416 transitions. Word has length 23 [2021-06-30 11:47:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:39,934 INFO L482 AbstractCegarLoop]: Abstraction has 3074 states and 15416 transitions. [2021-06-30 11:47:39,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 15416 transitions. [2021-06-30 11:47:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:39,943 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:39,943 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:39,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-30 11:47:39,944 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1060028259, now seen corresponding path program 2 times [2021-06-30 11:47:39,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:39,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575633881] [2021-06-30 11:47:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:39,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:39,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575633881] [2021-06-30 11:47:39,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575633881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:39,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944170050] [2021-06-30 11:47:39,989 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 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 [2021-06-30 11:47:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:40,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944170050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:40,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:40,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:40,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278554634] [2021-06-30 11:47:40,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:40,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:40,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:40,074 INFO L87 Difference]: Start difference. First operand 3074 states and 15416 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:40,215 INFO L93 Difference]: Finished difference Result 4296 states and 21183 transitions. [2021-06-30 11:47:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:40,229 INFO L225 Difference]: With dead ends: 4296 [2021-06-30 11:47:40,229 INFO L226 Difference]: Without dead ends: 4241 [2021-06-30 11:47:40,229 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-06-30 11:47:40,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 3074. [2021-06-30 11:47:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 3073 states have (on average 5.011064106736089) internal successors, (15399), 3073 states have internal predecessors, (15399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 15399 transitions. [2021-06-30 11:47:40,372 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 15399 transitions. Word has length 23 [2021-06-30 11:47:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:40,372 INFO L482 AbstractCegarLoop]: Abstraction has 3074 states and 15399 transitions. [2021-06-30 11:47:40,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 15399 transitions. [2021-06-30 11:47:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:40,382 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:40,382 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:40,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-30 11:47:40,605 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash -354814351, now seen corresponding path program 2 times [2021-06-30 11:47:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:40,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843570563] [2021-06-30 11:47:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:40,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:40,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843570563] [2021-06-30 11:47:40,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843570563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:40,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433061184] [2021-06-30 11:47:40,650 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 [2021-06-30 11:47:40,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:40,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:40,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:40,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433061184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:40,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:40,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:40,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288530053] [2021-06-30 11:47:40,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:40,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:40,735 INFO L87 Difference]: Start difference. First operand 3074 states and 15399 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:40,851 INFO L93 Difference]: Finished difference Result 4116 states and 20357 transitions. [2021-06-30 11:47:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:40,864 INFO L225 Difference]: With dead ends: 4116 [2021-06-30 11:47:40,864 INFO L226 Difference]: Without dead ends: 4032 [2021-06-30 11:47:40,864 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2021-06-30 11:47:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 3058. [2021-06-30 11:47:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3057 states have (on average 5.007523716061498) internal successors, (15308), 3057 states have internal predecessors, (15308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 15308 transitions. [2021-06-30 11:47:40,986 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 15308 transitions. Word has length 23 [2021-06-30 11:47:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:40,987 INFO L482 AbstractCegarLoop]: Abstraction has 3058 states and 15308 transitions. [2021-06-30 11:47:40,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 15308 transitions. [2021-06-30 11:47:40,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:40,996 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:40,996 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:41,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:41,215 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:41,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1852640187, now seen corresponding path program 1 times [2021-06-30 11:47:41,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:41,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136404396] [2021-06-30 11:47:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:41,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:41,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136404396] [2021-06-30 11:47:41,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136404396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:41,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355321349] [2021-06-30 11:47:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-30 11:47:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:41,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:41,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:41,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355321349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:41,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:41,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:41,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890131914] [2021-06-30 11:47:41,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:41,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:41,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:41,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:41,346 INFO L87 Difference]: Start difference. First operand 3058 states and 15308 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:41,456 INFO L93 Difference]: Finished difference Result 4227 states and 20907 transitions. [2021-06-30 11:47:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:41,474 INFO L225 Difference]: With dead ends: 4227 [2021-06-30 11:47:41,474 INFO L226 Difference]: Without dead ends: 4156 [2021-06-30 11:47:41,474 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-06-30 11:47:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3241. [2021-06-30 11:47:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3241 states, 3240 states have (on average 5.0320987654320986) internal successors, (16304), 3240 states have internal predecessors, (16304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 16304 transitions. [2021-06-30 11:47:41,608 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 16304 transitions. Word has length 23 [2021-06-30 11:47:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:41,609 INFO L482 AbstractCegarLoop]: Abstraction has 3241 states and 16304 transitions. [2021-06-30 11:47:41,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 16304 transitions. [2021-06-30 11:47:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:41,619 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:41,619 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:41,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:41,837 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:41,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:41,838 INFO L82 PathProgramCache]: Analyzing trace with hash -691167081, now seen corresponding path program 1 times [2021-06-30 11:47:41,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:41,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696093547] [2021-06-30 11:47:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:41,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696093547] [2021-06-30 11:47:41,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696093547] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:41,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:41,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:41,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105980233] [2021-06-30 11:47:41,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:41,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:41,880 INFO L87 Difference]: Start difference. First operand 3241 states and 16304 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:41,966 INFO L93 Difference]: Finished difference Result 4475 states and 22240 transitions. [2021-06-30 11:47:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:41,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:42,015 INFO L225 Difference]: With dead ends: 4475 [2021-06-30 11:47:42,016 INFO L226 Difference]: Without dead ends: 4441 [2021-06-30 11:47:42,016 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2021-06-30 11:47:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 3447. [2021-06-30 11:47:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 5.0670342426001165) internal successors, (17461), 3446 states have internal predecessors, (17461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 17461 transitions. [2021-06-30 11:47:42,145 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 17461 transitions. Word has length 23 [2021-06-30 11:47:42,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:42,145 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 17461 transitions. [2021-06-30 11:47:42,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 17461 transitions. [2021-06-30 11:47:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:42,156 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:42,156 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:42,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-30 11:47:42,156 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1199367149, now seen corresponding path program 2 times [2021-06-30 11:47:42,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:42,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116814486] [2021-06-30 11:47:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:42,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:42,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116814486] [2021-06-30 11:47:42,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116814486] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:42,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:42,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:42,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580171297] [2021-06-30 11:47:42,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:42,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:42,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:42,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:42,200 INFO L87 Difference]: Start difference. First operand 3447 states and 17461 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:42,285 INFO L93 Difference]: Finished difference Result 4467 states and 22393 transitions. [2021-06-30 11:47:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:42,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:42,299 INFO L225 Difference]: With dead ends: 4467 [2021-06-30 11:47:42,299 INFO L226 Difference]: Without dead ends: 4452 [2021-06-30 11:47:42,300 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4452 states. [2021-06-30 11:47:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4452 to 3644. [2021-06-30 11:47:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 5.082898709854516) internal successors, (18517), 3643 states have internal predecessors, (18517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 18517 transitions. [2021-06-30 11:47:42,435 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 18517 transitions. Word has length 23 [2021-06-30 11:47:42,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:42,436 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 18517 transitions. [2021-06-30 11:47:42,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 18517 transitions. [2021-06-30 11:47:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:42,444 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:42,444 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:42,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-30 11:47:42,445 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:42,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1214827945, now seen corresponding path program 3 times [2021-06-30 11:47:42,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:42,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080729499] [2021-06-30 11:47:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:42,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080729499] [2021-06-30 11:47:42,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080729499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277340073] [2021-06-30 11:47:42,488 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 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 [2021-06-30 11:47:42,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:42,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:42,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277340073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:42,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:42,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:42,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331767076] [2021-06-30 11:47:42,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:42,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:42,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:42,579 INFO L87 Difference]: Start difference. First operand 3644 states and 18517 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:42,687 INFO L93 Difference]: Finished difference Result 4872 states and 24364 transitions. [2021-06-30 11:47:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:42,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:42,702 INFO L225 Difference]: With dead ends: 4872 [2021-06-30 11:47:42,703 INFO L226 Difference]: Without dead ends: 4751 [2021-06-30 11:47:42,703 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:42,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-30 11:47:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3438. [2021-06-30 11:47:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 5.062845504800698) internal successors, (17401), 3437 states have internal predecessors, (17401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 17401 transitions. [2021-06-30 11:47:42,830 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 17401 transitions. Word has length 23 [2021-06-30 11:47:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:42,831 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 17401 transitions. [2021-06-30 11:47:42,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 17401 transitions. [2021-06-30 11:47:42,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:42,841 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:42,841 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:43,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-30 11:47:43,067 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash 582526309, now seen corresponding path program 1 times [2021-06-30 11:47:43,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:43,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376862690] [2021-06-30 11:47:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:43,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:43,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376862690] [2021-06-30 11:47:43,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376862690] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:43,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:43,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:43,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278920441] [2021-06-30 11:47:43,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:43,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:43,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:43,104 INFO L87 Difference]: Start difference. First operand 3438 states and 17401 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:43,195 INFO L93 Difference]: Finished difference Result 4682 states and 23370 transitions. [2021-06-30 11:47:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:43,212 INFO L225 Difference]: With dead ends: 4682 [2021-06-30 11:47:43,212 INFO L226 Difference]: Without dead ends: 4652 [2021-06-30 11:47:43,212 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4652 states. [2021-06-30 11:47:43,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4652 to 3615. [2021-06-30 11:47:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 5.10016602102933) internal successors, (18432), 3614 states have internal predecessors, (18432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 18432 transitions. [2021-06-30 11:47:43,370 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 18432 transitions. Word has length 23 [2021-06-30 11:47:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:43,370 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 18432 transitions. [2021-06-30 11:47:43,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 18432 transitions. [2021-06-30 11:47:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:43,379 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:43,379 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:43,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-30 11:47:43,380 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1602556443, now seen corresponding path program 2 times [2021-06-30 11:47:43,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:43,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401308426] [2021-06-30 11:47:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:43,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:43,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401308426] [2021-06-30 11:47:43,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401308426] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:43,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:43,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:43,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775451504] [2021-06-30 11:47:43,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:43,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:43,417 INFO L87 Difference]: Start difference. First operand 3615 states and 18432 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:43,500 INFO L93 Difference]: Finished difference Result 4660 states and 23487 transitions. [2021-06-30 11:47:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:43,514 INFO L225 Difference]: With dead ends: 4660 [2021-06-30 11:47:43,515 INFO L226 Difference]: Without dead ends: 4648 [2021-06-30 11:47:43,515 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2021-06-30 11:47:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 3794. [2021-06-30 11:47:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 5.120221460585289) internal successors, (19421), 3793 states have internal predecessors, (19421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 19421 transitions. [2021-06-30 11:47:43,641 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 19421 transitions. Word has length 23 [2021-06-30 11:47:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:43,641 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 19421 transitions. [2021-06-30 11:47:43,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 19421 transitions. [2021-06-30 11:47:43,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:43,649 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:43,649 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:43,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-30 11:47:43,649 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash 192885537, now seen corresponding path program 3 times [2021-06-30 11:47:43,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:43,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640335439] [2021-06-30 11:47:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:43,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:43,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640335439] [2021-06-30 11:47:43,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640335439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:43,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278307464] [2021-06-30 11:47:43,692 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 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 [2021-06-30 11:47:43,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:43,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:43,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:43,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:43,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278307464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:43,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:43,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:43,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925396990] [2021-06-30 11:47:43,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:43,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:43,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:43,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:43,797 INFO L87 Difference]: Start difference. First operand 3794 states and 19421 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:43,920 INFO L93 Difference]: Finished difference Result 5106 states and 25659 transitions. [2021-06-30 11:47:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:43,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:43,936 INFO L225 Difference]: With dead ends: 5106 [2021-06-30 11:47:43,936 INFO L226 Difference]: Without dead ends: 5018 [2021-06-30 11:47:43,936 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2021-06-30 11:47:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 3613. [2021-06-30 11:47:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 5.092746400885936) internal successors, (18395), 3612 states have internal predecessors, (18395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 18395 transitions. [2021-06-30 11:47:44,051 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 18395 transitions. Word has length 23 [2021-06-30 11:47:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:44,052 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 18395 transitions. [2021-06-30 11:47:44,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 18395 transitions. [2021-06-30 11:47:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:44,059 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:44,059 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:44,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-30 11:47:44,260 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1155956951, now seen corresponding path program 1 times [2021-06-30 11:47:44,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:44,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744473000] [2021-06-30 11:47:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:44,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:44,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744473000] [2021-06-30 11:47:44,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744473000] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:44,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:44,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:44,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341267245] [2021-06-30 11:47:44,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:44,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:44,305 INFO L87 Difference]: Start difference. First operand 3613 states and 18395 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:44,380 INFO L93 Difference]: Finished difference Result 4750 states and 23808 transitions. [2021-06-30 11:47:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:44,394 INFO L225 Difference]: With dead ends: 4750 [2021-06-30 11:47:44,394 INFO L226 Difference]: Without dead ends: 4707 [2021-06-30 11:47:44,394 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:44,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-06-30 11:47:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 3790. [2021-06-30 11:47:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 5.0889416732647135) internal successors, (19282), 3789 states have internal predecessors, (19282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 19282 transitions. [2021-06-30 11:47:44,513 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 19282 transitions. Word has length 23 [2021-06-30 11:47:44,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:44,513 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 19282 transitions. [2021-06-30 11:47:44,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 19282 transitions. [2021-06-30 11:47:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:44,521 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:44,521 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:44,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-30 11:47:44,522 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1392136301, now seen corresponding path program 2 times [2021-06-30 11:47:44,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:44,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212367059] [2021-06-30 11:47:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:44,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:44,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212367059] [2021-06-30 11:47:44,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212367059] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:44,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:44,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:44,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469225141] [2021-06-30 11:47:44,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:44,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:44,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:44,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:44,567 INFO L87 Difference]: Start difference. First operand 3790 states and 19282 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:44,648 INFO L93 Difference]: Finished difference Result 4708 states and 23695 transitions. [2021-06-30 11:47:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:44,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:44,662 INFO L225 Difference]: With dead ends: 4708 [2021-06-30 11:47:44,662 INFO L226 Difference]: Without dead ends: 4687 [2021-06-30 11:47:44,662 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2021-06-30 11:47:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3973. [2021-06-30 11:47:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3973 states, 3972 states have (on average 5.089123867069486) internal successors, (20214), 3972 states have internal predecessors, (20214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 20214 transitions. [2021-06-30 11:47:44,810 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 20214 transitions. Word has length 23 [2021-06-30 11:47:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:44,810 INFO L482 AbstractCegarLoop]: Abstraction has 3973 states and 20214 transitions. [2021-06-30 11:47:44,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 20214 transitions. [2021-06-30 11:47:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:44,818 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:44,818 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:44,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-30 11:47:44,818 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:44,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1447975443, now seen corresponding path program 3 times [2021-06-30 11:47:44,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:44,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112440389] [2021-06-30 11:47:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:44,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:44,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112440389] [2021-06-30 11:47:44,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112440389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:44,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608814261] [2021-06-30 11:47:44,864 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 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 [2021-06-30 11:47:44,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:44,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:44,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:44,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:44,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608814261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:44,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:44,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:44,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842531823] [2021-06-30 11:47:44,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:44,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:44,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:44,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:44,952 INFO L87 Difference]: Start difference. First operand 3973 states and 20214 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:45,050 INFO L93 Difference]: Finished difference Result 5145 states and 25820 transitions. [2021-06-30 11:47:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:45,064 INFO L225 Difference]: With dead ends: 5145 [2021-06-30 11:47:45,064 INFO L226 Difference]: Without dead ends: 4982 [2021-06-30 11:47:45,064 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-06-30 11:47:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3765. [2021-06-30 11:47:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 3764 states have (on average 5.083953241232731) internal successors, (19136), 3764 states have internal predecessors, (19136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 19136 transitions. [2021-06-30 11:47:45,164 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 19136 transitions. Word has length 23 [2021-06-30 11:47:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:45,164 INFO L482 AbstractCegarLoop]: Abstraction has 3765 states and 19136 transitions. [2021-06-30 11:47:45,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 19136 transitions. [2021-06-30 11:47:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:45,172 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:45,172 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:45,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-30 11:47:45,373 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1172683317, now seen corresponding path program 1 times [2021-06-30 11:47:45,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:45,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246139192] [2021-06-30 11:47:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:47:45,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:45,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246139192] [2021-06-30 11:47:45,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246139192] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:45,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:45,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:47:45,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895302083] [2021-06-30 11:47:45,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:45,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:45,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:45,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:45,416 INFO L87 Difference]: Start difference. First operand 3765 states and 19136 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:45,512 INFO L93 Difference]: Finished difference Result 5115 states and 25672 transitions. [2021-06-30 11:47:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:45,528 INFO L225 Difference]: With dead ends: 5115 [2021-06-30 11:47:45,528 INFO L226 Difference]: Without dead ends: 5106 [2021-06-30 11:47:45,528 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5106 states. [2021-06-30 11:47:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5106 to 4109. [2021-06-30 11:47:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 5.13047711781889) internal successors, (21076), 4108 states have internal predecessors, (21076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 21076 transitions. [2021-06-30 11:47:45,635 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 21076 transitions. Word has length 26 [2021-06-30 11:47:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:45,635 INFO L482 AbstractCegarLoop]: Abstraction has 4109 states and 21076 transitions. [2021-06-30 11:47:45,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 21076 transitions. [2021-06-30 11:47:45,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:45,643 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:45,643 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:45,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-30 11:47:45,643 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash -800239751, now seen corresponding path program 2 times [2021-06-30 11:47:45,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:45,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827001909] [2021-06-30 11:47:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:45,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:45,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827001909] [2021-06-30 11:47:45,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827001909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:45,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460674184] [2021-06-30 11:47:45,703 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 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 [2021-06-30 11:47:45,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:45,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:45,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460674184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:45,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:45,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:45,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915524890] [2021-06-30 11:47:45,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:45,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:45,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:45,788 INFO L87 Difference]: Start difference. First operand 4109 states and 21076 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:45,953 INFO L93 Difference]: Finished difference Result 5496 states and 27670 transitions. [2021-06-30 11:47:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:45,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:45,975 INFO L225 Difference]: With dead ends: 5496 [2021-06-30 11:47:45,976 INFO L226 Difference]: Without dead ends: 5463 [2021-06-30 11:47:45,976 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-06-30 11:47:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 3976. [2021-06-30 11:47:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 5.110188679245283) internal successors, (20313), 3975 states have internal predecessors, (20313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 20313 transitions. [2021-06-30 11:47:46,086 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 20313 transitions. Word has length 26 [2021-06-30 11:47:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:46,087 INFO L482 AbstractCegarLoop]: Abstraction has 3976 states and 20313 transitions. [2021-06-30 11:47:46,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 20313 transitions. [2021-06-30 11:47:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:46,094 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:46,094 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:46,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-30 11:47:46,297 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1977288091, now seen corresponding path program 1 times [2021-06-30 11:47:46,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:46,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113711146] [2021-06-30 11:47:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:47:46,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:46,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113711146] [2021-06-30 11:47:46,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113711146] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:46,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:46,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:47:46,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243376400] [2021-06-30 11:47:46,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:46,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:46,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:46,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:46,344 INFO L87 Difference]: Start difference. First operand 3976 states and 20313 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:46,461 INFO L93 Difference]: Finished difference Result 5117 states and 25747 transitions. [2021-06-30 11:47:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:46,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:46,476 INFO L225 Difference]: With dead ends: 5117 [2021-06-30 11:47:46,476 INFO L226 Difference]: Without dead ends: 5108 [2021-06-30 11:47:46,476 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2021-06-30 11:47:46,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 4184. [2021-06-30 11:47:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4184 states, 4183 states have (on average 5.129333014582835) internal successors, (21456), 4183 states have internal predecessors, (21456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4184 states to 4184 states and 21456 transitions. [2021-06-30 11:47:46,611 INFO L78 Accepts]: Start accepts. Automaton has 4184 states and 21456 transitions. Word has length 26 [2021-06-30 11:47:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:46,611 INFO L482 AbstractCegarLoop]: Abstraction has 4184 states and 21456 transitions. [2021-06-30 11:47:46,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4184 states and 21456 transitions. [2021-06-30 11:47:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:46,619 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:46,619 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:46,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-30 11:47:46,620 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1309166505, now seen corresponding path program 2 times [2021-06-30 11:47:46,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:46,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533021537] [2021-06-30 11:47:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:46,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:46,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533021537] [2021-06-30 11:47:46,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533021537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:46,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682410791] [2021-06-30 11:47:46,671 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 [2021-06-30 11:47:46,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:46,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:46,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:46,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682410791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:46,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:46,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:46,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087016776] [2021-06-30 11:47:46,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:46,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:46,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:46,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:46,779 INFO L87 Difference]: Start difference. First operand 4184 states and 21456 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:46,941 INFO L93 Difference]: Finished difference Result 5420 states and 27308 transitions. [2021-06-30 11:47:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:46,960 INFO L225 Difference]: With dead ends: 5420 [2021-06-30 11:47:46,960 INFO L226 Difference]: Without dead ends: 5371 [2021-06-30 11:47:46,961 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-06-30 11:47:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 4093. [2021-06-30 11:47:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 5.110948191593353) internal successors, (20914), 4092 states have internal predecessors, (20914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 20914 transitions. [2021-06-30 11:47:47,078 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 20914 transitions. Word has length 26 [2021-06-30 11:47:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:47,078 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 20914 transitions. [2021-06-30 11:47:47,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 20914 transitions. [2021-06-30 11:47:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:47,086 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:47,086 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:47,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:47,304 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1124591759, now seen corresponding path program 3 times [2021-06-30 11:47:47,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:47,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219746419] [2021-06-30 11:47:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:47,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:47,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219746419] [2021-06-30 11:47:47,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219746419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:47,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985421870] [2021-06-30 11:47:47,359 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 [2021-06-30 11:47:47,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:47,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:47,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:47,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985421870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:47,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:47,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:47,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199451448] [2021-06-30 11:47:47,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:47,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:47,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:47,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:47,530 INFO L87 Difference]: Start difference. First operand 4093 states and 20914 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:47,661 INFO L93 Difference]: Finished difference Result 5422 states and 27280 transitions. [2021-06-30 11:47:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:47,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:47,675 INFO L225 Difference]: With dead ends: 5422 [2021-06-30 11:47:47,675 INFO L226 Difference]: Without dead ends: 5413 [2021-06-30 11:47:47,675 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-30 11:47:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 4399. [2021-06-30 11:47:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 5.1493860845839015) internal successors, (22647), 4398 states have internal predecessors, (22647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 22647 transitions. [2021-06-30 11:47:47,788 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 22647 transitions. Word has length 26 [2021-06-30 11:47:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:47,789 INFO L482 AbstractCegarLoop]: Abstraction has 4399 states and 22647 transitions. [2021-06-30 11:47:47,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 22647 transitions. [2021-06-30 11:47:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:47,797 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:47,797 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:47,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-30 11:47:47,998 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1197452469, now seen corresponding path program 4 times [2021-06-30 11:47:47,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:47,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347849814] [2021-06-30 11:47:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:48,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:48,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347849814] [2021-06-30 11:47:48,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347849814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:48,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160808985] [2021-06-30 11:47:48,081 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 [2021-06-30 11:47:48,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:47:48,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:48,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:48,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:48,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160808985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:48,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:48,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:48,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434974108] [2021-06-30 11:47:48,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:48,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:48,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:48,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:48,176 INFO L87 Difference]: Start difference. First operand 4399 states and 22647 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:48,365 INFO L93 Difference]: Finished difference Result 5736 states and 28953 transitions. [2021-06-30 11:47:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:48,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:48,382 INFO L225 Difference]: With dead ends: 5736 [2021-06-30 11:47:48,382 INFO L226 Difference]: Without dead ends: 5703 [2021-06-30 11:47:48,382 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-06-30 11:47:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 4100. [2021-06-30 11:47:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4100 states, 4099 states have (on average 5.110514759697487) internal successors, (20948), 4099 states have internal predecessors, (20948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4100 states to 4100 states and 20948 transitions. [2021-06-30 11:47:48,549 INFO L78 Accepts]: Start accepts. Automaton has 4100 states and 20948 transitions. Word has length 26 [2021-06-30 11:47:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:48,549 INFO L482 AbstractCegarLoop]: Abstraction has 4100 states and 20948 transitions. [2021-06-30 11:47:48,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4100 states and 20948 transitions. [2021-06-30 11:47:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:48,558 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:48,558 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:48,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:48,776 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1038689867, now seen corresponding path program 5 times [2021-06-30 11:47:48,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:48,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822598143] [2021-06-30 11:47:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:48,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:48,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822598143] [2021-06-30 11:47:48,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822598143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:48,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403609954] [2021-06-30 11:47:48,832 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 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 [2021-06-30 11:47:48,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:47:48,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:48,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:48,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:48,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403609954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:48,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:48,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:48,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888255354] [2021-06-30 11:47:48,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:48,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:48,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:48,921 INFO L87 Difference]: Start difference. First operand 4100 states and 20948 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:49,058 INFO L93 Difference]: Finished difference Result 5667 states and 28511 transitions. [2021-06-30 11:47:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:49,075 INFO L225 Difference]: With dead ends: 5667 [2021-06-30 11:47:49,075 INFO L226 Difference]: Without dead ends: 5630 [2021-06-30 11:47:49,075 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2021-06-30 11:47:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 4307. [2021-06-30 11:47:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4307 states, 4306 states have (on average 5.143985137018114) internal successors, (22150), 4306 states have internal predecessors, (22150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 22150 transitions. [2021-06-30 11:47:49,192 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 22150 transitions. Word has length 26 [2021-06-30 11:47:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:49,192 INFO L482 AbstractCegarLoop]: Abstraction has 4307 states and 22150 transitions. [2021-06-30 11:47:49,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 22150 transitions. [2021-06-30 11:47:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:49,200 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:49,200 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:49,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-30 11:47:49,401 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:49,401 INFO L82 PathProgramCache]: Analyzing trace with hash -313225735, now seen corresponding path program 6 times [2021-06-30 11:47:49,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:49,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385906519] [2021-06-30 11:47:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:49,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385906519] [2021-06-30 11:47:49,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385906519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929086020] [2021-06-30 11:47:49,471 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 [2021-06-30 11:47:49,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:47:49,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:49,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:49,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929086020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:49,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:49,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:49,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919904757] [2021-06-30 11:47:49,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:49,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:49,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:49,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:49,550 INFO L87 Difference]: Start difference. First operand 4307 states and 22150 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:49,743 INFO L93 Difference]: Finished difference Result 6054 states and 30660 transitions. [2021-06-30 11:47:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:49,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:49,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:49,768 INFO L225 Difference]: With dead ends: 6054 [2021-06-30 11:47:49,768 INFO L226 Difference]: Without dead ends: 6038 [2021-06-30 11:47:49,768 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-06-30 11:47:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 4804. [2021-06-30 11:47:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4804 states, 4803 states have (on average 5.18717468249011) internal successors, (24914), 4803 states have internal predecessors, (24914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4804 states to 4804 states and 24914 transitions. [2021-06-30 11:47:49,936 INFO L78 Accepts]: Start accepts. Automaton has 4804 states and 24914 transitions. Word has length 26 [2021-06-30 11:47:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:49,936 INFO L482 AbstractCegarLoop]: Abstraction has 4804 states and 24914 transitions. [2021-06-30 11:47:49,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4804 states and 24914 transitions. [2021-06-30 11:47:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:49,949 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:49,949 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:50,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:50,174 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:50,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:50,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1512348363, now seen corresponding path program 7 times [2021-06-30 11:47:50,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:50,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383159754] [2021-06-30 11:47:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:50,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:50,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383159754] [2021-06-30 11:47:50,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383159754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:50,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529586893] [2021-06-30 11:47:50,238 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 [2021-06-30 11:47:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:50,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:50,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529586893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:50,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:50,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:50,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290721340] [2021-06-30 11:47:50,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:50,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:50,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:50,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:50,334 INFO L87 Difference]: Start difference. First operand 4804 states and 24914 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:50,534 INFO L93 Difference]: Finished difference Result 6582 states and 33551 transitions. [2021-06-30 11:47:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:50,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:50,560 INFO L225 Difference]: With dead ends: 6582 [2021-06-30 11:47:50,561 INFO L226 Difference]: Without dead ends: 6541 [2021-06-30 11:47:50,561 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2021-06-30 11:47:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 5067. [2021-06-30 11:47:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 5.201144887485196) internal successors, (26349), 5066 states have internal predecessors, (26349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 26349 transitions. [2021-06-30 11:47:50,764 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 26349 transitions. Word has length 26 [2021-06-30 11:47:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:50,765 INFO L482 AbstractCegarLoop]: Abstraction has 5067 states and 26349 transitions. [2021-06-30 11:47:50,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 26349 transitions. [2021-06-30 11:47:50,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:50,775 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:50,775 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:50,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-30 11:47:50,976 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash 713004959, now seen corresponding path program 8 times [2021-06-30 11:47:50,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:50,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940808745] [2021-06-30 11:47:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:51,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:51,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940808745] [2021-06-30 11:47:51,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940808745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:51,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386316070] [2021-06-30 11:47:51,028 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 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 [2021-06-30 11:47:51,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:51,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:51,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:51,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:51,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386316070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:51,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:51,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:51,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249153547] [2021-06-30 11:47:51,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:51,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:51,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:51,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:51,125 INFO L87 Difference]: Start difference. First operand 5067 states and 26349 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:51,295 INFO L93 Difference]: Finished difference Result 7340 states and 37670 transitions. [2021-06-30 11:47:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:51,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:51,319 INFO L225 Difference]: With dead ends: 7340 [2021-06-30 11:47:51,320 INFO L226 Difference]: Without dead ends: 7289 [2021-06-30 11:47:51,320 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2021-06-30 11:47:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 5881. [2021-06-30 11:47:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5881 states, 5880 states have (on average 5.25187074829932) internal successors, (30881), 5880 states have internal predecessors, (30881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5881 states to 5881 states and 30881 transitions. [2021-06-30 11:47:51,501 INFO L78 Accepts]: Start accepts. Automaton has 5881 states and 30881 transitions. Word has length 26 [2021-06-30 11:47:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:51,501 INFO L482 AbstractCegarLoop]: Abstraction has 5881 states and 30881 transitions. [2021-06-30 11:47:51,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5881 states and 30881 transitions. [2021-06-30 11:47:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:51,514 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:51,514 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:51,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-30 11:47:51,715 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:51,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:51,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1869312931, now seen corresponding path program 9 times [2021-06-30 11:47:51,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:51,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721618186] [2021-06-30 11:47:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:51,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:51,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721618186] [2021-06-30 11:47:51,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721618186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:51,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403753458] [2021-06-30 11:47:51,780 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 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 [2021-06-30 11:47:51,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:51,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:51,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:51,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:51,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403753458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:51,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:51,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:51,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89436463] [2021-06-30 11:47:51,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:51,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:51,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:51,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:51,859 INFO L87 Difference]: Start difference. First operand 5881 states and 30881 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:52,052 INFO L93 Difference]: Finished difference Result 8022 states and 41390 transitions. [2021-06-30 11:47:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:52,078 INFO L225 Difference]: With dead ends: 8022 [2021-06-30 11:47:52,078 INFO L226 Difference]: Without dead ends: 7877 [2021-06-30 11:47:52,079 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7877 states. [2021-06-30 11:47:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7877 to 5478. [2021-06-30 11:47:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 5.226766477998905) internal successors, (28627), 5477 states have internal predecessors, (28627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 28627 transitions. [2021-06-30 11:47:52,232 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 28627 transitions. Word has length 26 [2021-06-30 11:47:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:52,232 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 28627 transitions. [2021-06-30 11:47:52,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 28627 transitions. [2021-06-30 11:47:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:52,243 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:52,244 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:52,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-30 11:47:52,444 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:52,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1377793119, now seen corresponding path program 3 times [2021-06-30 11:47:52,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:52,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818428913] [2021-06-30 11:47:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:52,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:52,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818428913] [2021-06-30 11:47:52,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818428913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:52,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332920718] [2021-06-30 11:47:52,498 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 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 [2021-06-30 11:47:52,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:52,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:52,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:52,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332920718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:52,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:52,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:52,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794677697] [2021-06-30 11:47:52,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:52,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:52,574 INFO L87 Difference]: Start difference. First operand 5478 states and 28627 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:52,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:52,726 INFO L93 Difference]: Finished difference Result 6503 states and 33530 transitions. [2021-06-30 11:47:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:52,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:52,747 INFO L225 Difference]: With dead ends: 6503 [2021-06-30 11:47:52,747 INFO L226 Difference]: Without dead ends: 6494 [2021-06-30 11:47:52,748 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6494 states. [2021-06-30 11:47:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6494 to 5648. [2021-06-30 11:47:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5648 states, 5647 states have (on average 5.2450858863113154) internal successors, (29619), 5647 states have internal predecessors, (29619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5648 states to 5648 states and 29619 transitions. [2021-06-30 11:47:52,890 INFO L78 Accepts]: Start accepts. Automaton has 5648 states and 29619 transitions. Word has length 26 [2021-06-30 11:47:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:52,891 INFO L482 AbstractCegarLoop]: Abstraction has 5648 states and 29619 transitions. [2021-06-30 11:47:52,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:52,891 INFO L276 IsEmpty]: Start isEmpty. Operand 5648 states and 29619 transitions. [2021-06-30 11:47:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:52,902 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:52,902 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:53,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-30 11:47:53,103 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:53,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1908661477, now seen corresponding path program 4 times [2021-06-30 11:47:53,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:53,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389982449] [2021-06-30 11:47:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:53,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:53,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389982449] [2021-06-30 11:47:53,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389982449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:53,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255779115] [2021-06-30 11:47:53,168 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 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 [2021-06-30 11:47:53,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:47:53,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:53,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:53,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255779115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:53,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:53,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:53,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646459595] [2021-06-30 11:47:53,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:53,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:53,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:53,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:53,338 INFO L87 Difference]: Start difference. First operand 5648 states and 29619 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:53,548 INFO L93 Difference]: Finished difference Result 6782 states and 34935 transitions. [2021-06-30 11:47:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:53,577 INFO L225 Difference]: With dead ends: 6782 [2021-06-30 11:47:53,577 INFO L226 Difference]: Without dead ends: 6737 [2021-06-30 11:47:53,578 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:53,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2021-06-30 11:47:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 5482. [2021-06-30 11:47:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5482 states, 5481 states have (on average 5.226600985221675) internal successors, (28647), 5481 states have internal predecessors, (28647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5482 states to 5482 states and 28647 transitions. [2021-06-30 11:47:53,768 INFO L78 Accepts]: Start accepts. Automaton has 5482 states and 28647 transitions. Word has length 26 [2021-06-30 11:47:53,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:53,768 INFO L482 AbstractCegarLoop]: Abstraction has 5482 states and 28647 transitions. [2021-06-30 11:47:53,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states and 28647 transitions. [2021-06-30 11:47:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:53,783 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:53,783 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:53,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:53,997 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash -209269275, now seen corresponding path program 5 times [2021-06-30 11:47:53,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:53,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182436995] [2021-06-30 11:47:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:54,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:54,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182436995] [2021-06-30 11:47:54,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182436995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:54,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849441906] [2021-06-30 11:47:54,056 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 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 [2021-06-30 11:47:54,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:47:54,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:54,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:54,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849441906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:54,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:54,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:54,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739470594] [2021-06-30 11:47:54,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:54,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:54,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:54,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:54,151 INFO L87 Difference]: Start difference. First operand 5482 states and 28647 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:54,321 INFO L93 Difference]: Finished difference Result 6947 states and 35772 transitions. [2021-06-30 11:47:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:54,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:54,349 INFO L225 Difference]: With dead ends: 6947 [2021-06-30 11:47:54,349 INFO L226 Difference]: Without dead ends: 6910 [2021-06-30 11:47:54,349 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6910 states. [2021-06-30 11:47:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6910 to 5724. [2021-06-30 11:47:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5724 states, 5723 states have (on average 5.260352961733356) internal successors, (30105), 5723 states have internal predecessors, (30105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5724 states to 5724 states and 30105 transitions. [2021-06-30 11:47:54,516 INFO L78 Accepts]: Start accepts. Automaton has 5724 states and 30105 transitions. Word has length 26 [2021-06-30 11:47:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:54,516 INFO L482 AbstractCegarLoop]: Abstraction has 5724 states and 30105 transitions. [2021-06-30 11:47:54,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5724 states and 30105 transitions. [2021-06-30 11:47:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:54,530 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:54,530 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:54,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:54,731 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:54,731 INFO L82 PathProgramCache]: Analyzing trace with hash 397983273, now seen corresponding path program 6 times [2021-06-30 11:47:54,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:54,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57040047] [2021-06-30 11:47:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:54,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:54,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57040047] [2021-06-30 11:47:54,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57040047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:54,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627354347] [2021-06-30 11:47:54,801 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 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 [2021-06-30 11:47:54,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:47:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:54,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627354347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:54,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:54,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:54,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641544952] [2021-06-30 11:47:54,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:54,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:54,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:54,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:54,885 INFO L87 Difference]: Start difference. First operand 5724 states and 30105 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:55,069 INFO L93 Difference]: Finished difference Result 7073 states and 36661 transitions. [2021-06-30 11:47:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:55,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:55,092 INFO L225 Difference]: With dead ends: 7073 [2021-06-30 11:47:55,092 INFO L226 Difference]: Without dead ends: 7048 [2021-06-30 11:47:55,095 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7048 states. [2021-06-30 11:47:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7048 to 6047. [2021-06-30 11:47:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6047 states, 6046 states have (on average 5.276381078398941) internal successors, (31901), 6046 states have internal predecessors, (31901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6047 states to 6047 states and 31901 transitions. [2021-06-30 11:47:55,246 INFO L78 Accepts]: Start accepts. Automaton has 6047 states and 31901 transitions. Word has length 26 [2021-06-30 11:47:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:55,246 INFO L482 AbstractCegarLoop]: Abstraction has 6047 states and 31901 transitions. [2021-06-30 11:47:55,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6047 states and 31901 transitions. [2021-06-30 11:47:55,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:55,259 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:55,259 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:55,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-30 11:47:55,460 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:55,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:55,460 INFO L82 PathProgramCache]: Analyzing trace with hash -633089691, now seen corresponding path program 7 times [2021-06-30 11:47:55,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:55,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736658003] [2021-06-30 11:47:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:55,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:55,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736658003] [2021-06-30 11:47:55,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736658003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:55,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134893561] [2021-06-30 11:47:55,515 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) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:55,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:55,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134893561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:55,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:55,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:55,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554563438] [2021-06-30 11:47:55,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:55,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:55,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:55,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:55,593 INFO L87 Difference]: Start difference. First operand 6047 states and 31901 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:55,844 INFO L93 Difference]: Finished difference Result 7597 states and 39420 transitions. [2021-06-30 11:47:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:55,871 INFO L225 Difference]: With dead ends: 7597 [2021-06-30 11:47:55,871 INFO L226 Difference]: Without dead ends: 7556 [2021-06-30 11:47:55,871 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:55,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7556 states. [2021-06-30 11:47:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7556 to 6263. [2021-06-30 11:47:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6263 states, 6262 states have (on average 5.278505269881827) internal successors, (33054), 6262 states have internal predecessors, (33054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6263 states to 6263 states and 33054 transitions. [2021-06-30 11:47:56,026 INFO L78 Accepts]: Start accepts. Automaton has 6263 states and 33054 transitions. Word has length 26 [2021-06-30 11:47:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:56,026 INFO L482 AbstractCegarLoop]: Abstraction has 6263 states and 33054 transitions. [2021-06-30 11:47:56,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6263 states and 33054 transitions. [2021-06-30 11:47:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:56,039 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:56,039 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:56,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:56,240 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:56,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1320521297, now seen corresponding path program 8 times [2021-06-30 11:47:56,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:56,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543653765] [2021-06-30 11:47:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:56,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:56,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543653765] [2021-06-30 11:47:56,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543653765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:56,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106840326] [2021-06-30 11:47:56,283 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 [2021-06-30 11:47:56,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:56,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:56,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:56,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106840326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:56,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:56,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:56,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972336508] [2021-06-30 11:47:56,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:56,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:56,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:56,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:56,372 INFO L87 Difference]: Start difference. First operand 6263 states and 33054 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:56,513 INFO L93 Difference]: Finished difference Result 8078 states and 41925 transitions. [2021-06-30 11:47:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:56,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:56,547 INFO L225 Difference]: With dead ends: 8078 [2021-06-30 11:47:56,548 INFO L226 Difference]: Without dead ends: 8014 [2021-06-30 11:47:56,548 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-06-30 11:47:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 6810. [2021-06-30 11:47:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6810 states, 6809 states have (on average 5.285063886033192) internal successors, (35986), 6809 states have internal predecessors, (35986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6810 states to 6810 states and 35986 transitions. [2021-06-30 11:47:56,753 INFO L78 Accepts]: Start accepts. Automaton has 6810 states and 35986 transitions. Word has length 26 [2021-06-30 11:47:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:56,753 INFO L482 AbstractCegarLoop]: Abstraction has 6810 states and 35986 transitions. [2021-06-30 11:47:56,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6810 states and 35986 transitions. [2021-06-30 11:47:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:56,768 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:56,768 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:56,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-30 11:47:56,968 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash 750358963, now seen corresponding path program 9 times [2021-06-30 11:47:56,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:56,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230225410] [2021-06-30 11:47:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:57,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:57,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230225410] [2021-06-30 11:47:57,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230225410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:57,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480938029] [2021-06-30 11:47:57,035 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 [2021-06-30 11:47:57,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:57,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:57,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480938029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:57,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:57,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:57,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872159089] [2021-06-30 11:47:57,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:57,116 INFO L87 Difference]: Start difference. First operand 6810 states and 35986 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:57,295 INFO L93 Difference]: Finished difference Result 8561 states and 44552 transitions. [2021-06-30 11:47:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:57,321 INFO L225 Difference]: With dead ends: 8561 [2021-06-30 11:47:57,321 INFO L226 Difference]: Without dead ends: 8352 [2021-06-30 11:47:57,321 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-06-30 11:47:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6477. [2021-06-30 11:47:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6477 states, 6476 states have (on average 5.289221741815936) internal successors, (34253), 6476 states have internal predecessors, (34253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6477 states to 6477 states and 34253 transitions. [2021-06-30 11:47:57,499 INFO L78 Accepts]: Start accepts. Automaton has 6477 states and 34253 transitions. Word has length 26 [2021-06-30 11:47:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:57,499 INFO L482 AbstractCegarLoop]: Abstraction has 6477 states and 34253 transitions. [2021-06-30 11:47:57,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6477 states and 34253 transitions. [2021-06-30 11:47:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:57,513 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:57,513 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:57,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-30 11:47:57,714 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1439974287, now seen corresponding path program 10 times [2021-06-30 11:47:57,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:57,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946421546] [2021-06-30 11:47:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:57,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946421546] [2021-06-30 11:47:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946421546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282262021] [2021-06-30 11:47:57,765 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 [2021-06-30 11:47:57,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:47:57,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:57,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:57,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:57,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282262021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:57,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:57,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:57,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777892451] [2021-06-30 11:47:57,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:57,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:57,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:57,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:57,842 INFO L87 Difference]: Start difference. First operand 6477 states and 34253 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:58,078 INFO L93 Difference]: Finished difference Result 8466 states and 43962 transitions. [2021-06-30 11:47:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:58,105 INFO L225 Difference]: With dead ends: 8466 [2021-06-30 11:47:58,105 INFO L226 Difference]: Without dead ends: 8429 [2021-06-30 11:47:58,105 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8429 states. [2021-06-30 11:47:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8429 to 7062. [2021-06-30 11:47:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7062 states, 7061 states have (on average 5.31355332105934) internal successors, (37519), 7061 states have internal predecessors, (37519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7062 states to 7062 states and 37519 transitions. [2021-06-30 11:47:58,275 INFO L78 Accepts]: Start accepts. Automaton has 7062 states and 37519 transitions. Word has length 26 [2021-06-30 11:47:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:58,275 INFO L482 AbstractCegarLoop]: Abstraction has 7062 states and 37519 transitions. [2021-06-30 11:47:58,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 7062 states and 37519 transitions. [2021-06-30 11:47:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:58,290 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:58,290 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:58,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-30 11:47:58,491 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2129528877, now seen corresponding path program 11 times [2021-06-30 11:47:58,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:58,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755159838] [2021-06-30 11:47:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:58,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:58,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755159838] [2021-06-30 11:47:58,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755159838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:58,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990577956] [2021-06-30 11:47:58,554 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 [2021-06-30 11:47:58,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-30 11:47:58,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:58,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:58,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:58,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990577956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:58,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:58,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:58,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642231436] [2021-06-30 11:47:58,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:58,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:58,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:58,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:58,629 INFO L87 Difference]: Start difference. First operand 7062 states and 37519 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:58,832 INFO L93 Difference]: Finished difference Result 9398 states and 49371 transitions. [2021-06-30 11:47:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:58,859 INFO L225 Difference]: With dead ends: 9398 [2021-06-30 11:47:58,860 INFO L226 Difference]: Without dead ends: 9366 [2021-06-30 11:47:58,860 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9366 states. [2021-06-30 11:47:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9366 to 7924. [2021-06-30 11:47:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7924 states, 7923 states have (on average 5.372459926795406) internal successors, (42566), 7923 states have internal predecessors, (42566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7924 states to 7924 states and 42566 transitions. [2021-06-30 11:47:59,061 INFO L78 Accepts]: Start accepts. Automaton has 7924 states and 42566 transitions. Word has length 26 [2021-06-30 11:47:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:59,061 INFO L482 AbstractCegarLoop]: Abstraction has 7924 states and 42566 transitions. [2021-06-30 11:47:59,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 7924 states and 42566 transitions. [2021-06-30 11:47:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:59,078 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:59,078 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:59,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-30 11:47:59,278 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:59,279 INFO L82 PathProgramCache]: Analyzing trace with hash 966315791, now seen corresponding path program 12 times [2021-06-30 11:47:59,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:59,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060499079] [2021-06-30 11:47:59,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:59,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:59,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060499079] [2021-06-30 11:47:59,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060499079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:59,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684812955] [2021-06-30 11:47:59,332 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 [2021-06-30 11:47:59,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:47:59,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:59,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:59,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684812955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:59,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:59,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:59,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315996181] [2021-06-30 11:47:59,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:59,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:59,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:59,415 INFO L87 Difference]: Start difference. First operand 7924 states and 42566 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:59,599 INFO L93 Difference]: Finished difference Result 10447 states and 55203 transitions. [2021-06-30 11:47:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:59,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:59,631 INFO L225 Difference]: With dead ends: 10447 [2021-06-30 11:47:59,631 INFO L226 Difference]: Without dead ends: 10426 [2021-06-30 11:47:59,632 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10426 states. [2021-06-30 11:47:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10426 to 8744. [2021-06-30 11:47:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8744 states, 8743 states have (on average 5.413588013267757) internal successors, (47331), 8743 states have internal predecessors, (47331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8744 states to 8744 states and 47331 transitions. [2021-06-30 11:47:59,845 INFO L78 Accepts]: Start accepts. Automaton has 8744 states and 47331 transitions. Word has length 26 [2021-06-30 11:47:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:59,845 INFO L482 AbstractCegarLoop]: Abstraction has 8744 states and 47331 transitions. [2021-06-30 11:47:59,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8744 states and 47331 transitions. [2021-06-30 11:47:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:59,958 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:59,959 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:00,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-30 11:48:00,159 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash -371251423, now seen corresponding path program 13 times [2021-06-30 11:48:00,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:00,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752666224] [2021-06-30 11:48:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:00,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:00,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752666224] [2021-06-30 11:48:00,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752666224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:00,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744623607] [2021-06-30 11:48:00,220 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 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 [2021-06-30 11:48:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:00,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744623607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:00,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:00,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:00,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117171822] [2021-06-30 11:48:00,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:00,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:00,315 INFO L87 Difference]: Start difference. First operand 8744 states and 47331 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:00,583 INFO L93 Difference]: Finished difference Result 11758 states and 62533 transitions. [2021-06-30 11:48:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:00,638 INFO L225 Difference]: With dead ends: 11758 [2021-06-30 11:48:00,639 INFO L226 Difference]: Without dead ends: 11645 [2021-06-30 11:48:00,639 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2021-06-30 11:48:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 9732. [2021-06-30 11:48:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9732 states, 9731 states have (on average 5.453704655225568) internal successors, (53070), 9731 states have internal predecessors, (53070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9732 states to 9732 states and 53070 transitions. [2021-06-30 11:48:01,010 INFO L78 Accepts]: Start accepts. Automaton has 9732 states and 53070 transitions. Word has length 26 [2021-06-30 11:48:01,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:01,010 INFO L482 AbstractCegarLoop]: Abstraction has 9732 states and 53070 transitions. [2021-06-30 11:48:01,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:01,011 INFO L276 IsEmpty]: Start isEmpty. Operand 9732 states and 53070 transitions. [2021-06-30 11:48:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:01,038 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:01,039 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:01,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:01,253 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:01,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:01,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1199728289, now seen corresponding path program 10 times [2021-06-30 11:48:01,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:01,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270712961] [2021-06-30 11:48:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:01,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:01,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270712961] [2021-06-30 11:48:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270712961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:01,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133499553] [2021-06-30 11:48:01,314 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 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 [2021-06-30 11:48:01,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:01,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:01,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:01,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:01,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133499553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:01,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:01,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:01,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085960928] [2021-06-30 11:48:01,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:01,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:01,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:01,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:01,387 INFO L87 Difference]: Start difference. First operand 9732 states and 53070 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:01,585 INFO L93 Difference]: Finished difference Result 11213 states and 60327 transitions. [2021-06-30 11:48:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:01,620 INFO L225 Difference]: With dead ends: 11213 [2021-06-30 11:48:01,620 INFO L226 Difference]: Without dead ends: 11176 [2021-06-30 11:48:01,620 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11176 states. [2021-06-30 11:48:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11176 to 10067. [2021-06-30 11:48:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10067 states, 10066 states have (on average 5.460460957679317) internal successors, (54965), 10066 states have internal predecessors, (54965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10067 states to 10067 states and 54965 transitions. [2021-06-30 11:48:01,865 INFO L78 Accepts]: Start accepts. Automaton has 10067 states and 54965 transitions. Word has length 26 [2021-06-30 11:48:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:01,865 INFO L482 AbstractCegarLoop]: Abstraction has 10067 states and 54965 transitions. [2021-06-30 11:48:01,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10067 states and 54965 transitions. [2021-06-30 11:48:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:01,887 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:01,888 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:02,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:02,097 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash -592475741, now seen corresponding path program 11 times [2021-06-30 11:48:02,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:02,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901900935] [2021-06-30 11:48:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:02,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:02,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901900935] [2021-06-30 11:48:02,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901900935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:02,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608320038] [2021-06-30 11:48:02,153 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 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 [2021-06-30 11:48:02,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-30 11:48:02,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:02,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:02,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:02,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608320038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:02,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:02,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:02,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750782669] [2021-06-30 11:48:02,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:02,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:02,266 INFO L87 Difference]: Start difference. First operand 10067 states and 54965 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:02,528 INFO L93 Difference]: Finished difference Result 11759 states and 63461 transitions. [2021-06-30 11:48:02,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:02,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:02,583 INFO L225 Difference]: With dead ends: 11759 [2021-06-30 11:48:02,583 INFO L226 Difference]: Without dead ends: 11718 [2021-06-30 11:48:02,584 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11718 states. [2021-06-30 11:48:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11718 to 10567. [2021-06-30 11:48:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10567 states, 10566 states have (on average 5.477948135529055) internal successors, (57880), 10566 states have internal predecessors, (57880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10567 states to 10567 states and 57880 transitions. [2021-06-30 11:48:02,953 INFO L78 Accepts]: Start accepts. Automaton has 10567 states and 57880 transitions. Word has length 26 [2021-06-30 11:48:02,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:02,953 INFO L482 AbstractCegarLoop]: Abstraction has 10567 states and 57880 transitions. [2021-06-30 11:48:02,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 10567 states and 57880 transitions. [2021-06-30 11:48:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:02,975 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:02,975 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:03,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-30 11:48:03,176 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1623548705, now seen corresponding path program 12 times [2021-06-30 11:48:03,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:03,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463624210] [2021-06-30 11:48:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:03,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:03,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463624210] [2021-06-30 11:48:03,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463624210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:03,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019906339] [2021-06-30 11:48:03,227 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 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 [2021-06-30 11:48:03,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:48:03,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:03,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:03,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019906339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:03,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:03,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:03,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554719366] [2021-06-30 11:48:03,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:03,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:03,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:03,311 INFO L87 Difference]: Start difference. First operand 10567 states and 57880 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:03,507 INFO L93 Difference]: Finished difference Result 12353 states and 66750 transitions. [2021-06-30 11:48:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:03,553 INFO L225 Difference]: With dead ends: 12353 [2021-06-30 11:48:03,553 INFO L226 Difference]: Without dead ends: 12332 [2021-06-30 11:48:03,553 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12332 states. [2021-06-30 11:48:03,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12332 to 11017. [2021-06-30 11:48:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11017 states, 11016 states have (on average 5.493827160493828) internal successors, (60520), 11016 states have internal predecessors, (60520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11017 states to 11017 states and 60520 transitions. [2021-06-30 11:48:03,850 INFO L78 Accepts]: Start accepts. Automaton has 11017 states and 60520 transitions. Word has length 26 [2021-06-30 11:48:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:03,850 INFO L482 AbstractCegarLoop]: Abstraction has 11017 states and 60520 transitions. [2021-06-30 11:48:03,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 11017 states and 60520 transitions. [2021-06-30 11:48:03,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:03,876 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:03,877 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:04,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:04,078 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1333851377, now seen corresponding path program 13 times [2021-06-30 11:48:04,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:04,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778669987] [2021-06-30 11:48:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:04,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778669987] [2021-06-30 11:48:04,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778669987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467148893] [2021-06-30 11:48:04,133 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 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 [2021-06-30 11:48:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:04,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467148893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:04,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:04,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:04,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726672854] [2021-06-30 11:48:04,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:04,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:04,222 INFO L87 Difference]: Start difference. First operand 11017 states and 60520 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:04,430 INFO L93 Difference]: Finished difference Result 13151 states and 71239 transitions. [2021-06-30 11:48:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:04,478 INFO L225 Difference]: With dead ends: 13151 [2021-06-30 11:48:04,478 INFO L226 Difference]: Without dead ends: 12996 [2021-06-30 11:48:04,478 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12996 states. [2021-06-30 11:48:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12996 to 11552. [2021-06-30 11:48:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11552 states, 11551 states have (on average 5.511644013505324) internal successors, (63665), 11551 states have internal predecessors, (63665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:04,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11552 states to 11552 states and 63665 transitions. [2021-06-30 11:48:04,938 INFO L78 Accepts]: Start accepts. Automaton has 11552 states and 63665 transitions. Word has length 26 [2021-06-30 11:48:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:04,938 INFO L482 AbstractCegarLoop]: Abstraction has 11552 states and 63665 transitions. [2021-06-30 11:48:04,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 11552 states and 63665 transitions. [2021-06-30 11:48:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:04,962 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:04,962 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:05,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-30 11:48:05,163 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:05,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1543366509, now seen corresponding path program 1 times [2021-06-30 11:48:05,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:05,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578169103] [2021-06-30 11:48:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:05,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:05,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578169103] [2021-06-30 11:48:05,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578169103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:05,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757239847] [2021-06-30 11:48:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-30 11:48:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:05,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:05,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:05,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757239847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:05,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:05,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:05,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564333962] [2021-06-30 11:48:05,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:05,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:05,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:05,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:05,302 INFO L87 Difference]: Start difference. First operand 11552 states and 63665 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:05,489 INFO L93 Difference]: Finished difference Result 12598 states and 68554 transitions. [2021-06-30 11:48:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:05,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:05,538 INFO L225 Difference]: With dead ends: 12598 [2021-06-30 11:48:05,538 INFO L226 Difference]: Without dead ends: 12589 [2021-06-30 11:48:05,538 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12589 states. [2021-06-30 11:48:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12589 to 11749. [2021-06-30 11:48:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 11748 states have (on average 5.508767449778686) internal successors, (64717), 11748 states have internal predecessors, (64717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 64717 transitions. [2021-06-30 11:48:06,000 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 64717 transitions. Word has length 26 [2021-06-30 11:48:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:06,000 INFO L482 AbstractCegarLoop]: Abstraction has 11749 states and 64717 transitions. [2021-06-30 11:48:06,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 64717 transitions. [2021-06-30 11:48:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:06,024 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:06,024 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:06,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:06,225 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:06,225 INFO L82 PathProgramCache]: Analyzing trace with hash -429556559, now seen corresponding path program 2 times [2021-06-30 11:48:06,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:06,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840551292] [2021-06-30 11:48:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:06,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:06,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840551292] [2021-06-30 11:48:06,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840551292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:06,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549809198] [2021-06-30 11:48:06,276 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 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 [2021-06-30 11:48:06,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:06,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:06,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549809198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:06,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:06,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:06,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918198927] [2021-06-30 11:48:06,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:06,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:06,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:06,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:06,370 INFO L87 Difference]: Start difference. First operand 11749 states and 64717 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:06,731 INFO L93 Difference]: Finished difference Result 13031 states and 70731 transitions. [2021-06-30 11:48:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:06,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:06,788 INFO L225 Difference]: With dead ends: 13031 [2021-06-30 11:48:06,788 INFO L226 Difference]: Without dead ends: 12998 [2021-06-30 11:48:06,788 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12998 states. [2021-06-30 11:48:07,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12998 to 11766. [2021-06-30 11:48:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11766 states, 11765 states have (on average 5.508457288567786) internal successors, (64807), 11765 states have internal predecessors, (64807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11766 states to 11766 states and 64807 transitions. [2021-06-30 11:48:07,236 INFO L78 Accepts]: Start accepts. Automaton has 11766 states and 64807 transitions. Word has length 26 [2021-06-30 11:48:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:07,236 INFO L482 AbstractCegarLoop]: Abstraction has 11766 states and 64807 transitions. [2021-06-30 11:48:07,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 11766 states and 64807 transitions. [2021-06-30 11:48:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:07,264 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:07,264 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:07,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-30 11:48:07,465 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash -547768143, now seen corresponding path program 3 times [2021-06-30 11:48:07,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:07,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584551311] [2021-06-30 11:48:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:07,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:07,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584551311] [2021-06-30 11:48:07,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584551311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:07,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068835557] [2021-06-30 11:48:07,548 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 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 [2021-06-30 11:48:07,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:07,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:07,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:07,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068835557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:07,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:07,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:07,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389982088] [2021-06-30 11:48:07,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:07,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:07,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:07,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:07,660 INFO L87 Difference]: Start difference. First operand 11766 states and 64807 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:07,878 INFO L93 Difference]: Finished difference Result 12989 states and 70674 transitions. [2021-06-30 11:48:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:07,946 INFO L225 Difference]: With dead ends: 12989 [2021-06-30 11:48:07,946 INFO L226 Difference]: Without dead ends: 12944 [2021-06-30 11:48:07,947 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12944 states. [2021-06-30 11:48:08,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12944 to 11940. [2021-06-30 11:48:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11940 states, 11939 states have (on average 5.513443336962895) internal successors, (65825), 11939 states have internal predecessors, (65825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11940 states to 11940 states and 65825 transitions. [2021-06-30 11:48:08,517 INFO L78 Accepts]: Start accepts. Automaton has 11940 states and 65825 transitions. Word has length 26 [2021-06-30 11:48:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:08,517 INFO L482 AbstractCegarLoop]: Abstraction has 11940 states and 65825 transitions. [2021-06-30 11:48:08,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 11940 states and 65825 transitions. [2021-06-30 11:48:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:08,544 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:08,544 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:08,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-30 11:48:08,746 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:08,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1052347637, now seen corresponding path program 4 times [2021-06-30 11:48:08,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:08,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792388101] [2021-06-30 11:48:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:08,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:08,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792388101] [2021-06-30 11:48:08,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792388101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:08,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160500873] [2021-06-30 11:48:08,930 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 [2021-06-30 11:48:08,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:08,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:08,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:09,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160500873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:09,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:09,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:09,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443948460] [2021-06-30 11:48:09,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:09,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:09,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:09,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:09,005 INFO L87 Difference]: Start difference. First operand 11940 states and 65825 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:09,378 INFO L93 Difference]: Finished difference Result 13373 states and 72777 transitions. [2021-06-30 11:48:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:09,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:09,442 INFO L225 Difference]: With dead ends: 13373 [2021-06-30 11:48:09,442 INFO L226 Difference]: Without dead ends: 13357 [2021-06-30 11:48:09,443 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13357 states. [2021-06-30 11:48:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13357 to 12284. [2021-06-30 11:48:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12284 states, 12283 states have (on average 5.515672067084588) internal successors, (67749), 12283 states have internal predecessors, (67749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12284 states to 12284 states and 67749 transitions. [2021-06-30 11:48:09,907 INFO L78 Accepts]: Start accepts. Automaton has 12284 states and 67749 transitions. Word has length 26 [2021-06-30 11:48:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:09,907 INFO L482 AbstractCegarLoop]: Abstraction has 12284 states and 67749 transitions. [2021-06-30 11:48:09,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 12284 states and 67749 transitions. [2021-06-30 11:48:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:09,934 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:09,934 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:10,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-30 11:48:10,135 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:10,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1848708341, now seen corresponding path program 5 times [2021-06-30 11:48:10,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:10,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319416371] [2021-06-30 11:48:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:10,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:10,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319416371] [2021-06-30 11:48:10,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319416371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:10,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934810819] [2021-06-30 11:48:10,194 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 [2021-06-30 11:48:10,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-30 11:48:10,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:10,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934810819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:10,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:10,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:10,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930340030] [2021-06-30 11:48:10,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:10,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:10,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:10,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:10,262 INFO L87 Difference]: Start difference. First operand 12284 states and 67749 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:10,566 INFO L93 Difference]: Finished difference Result 13651 states and 74406 transitions. [2021-06-30 11:48:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:10,624 INFO L225 Difference]: With dead ends: 13651 [2021-06-30 11:48:10,624 INFO L226 Difference]: Without dead ends: 13602 [2021-06-30 11:48:10,624 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:10,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13602 states. [2021-06-30 11:48:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13602 to 12479. [2021-06-30 11:48:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12479 states, 12478 states have (on average 5.516669338034942) internal successors, (68837), 12478 states have internal predecessors, (68837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12479 states to 12479 states and 68837 transitions. [2021-06-30 11:48:11,058 INFO L78 Accepts]: Start accepts. Automaton has 12479 states and 68837 transitions. Word has length 26 [2021-06-30 11:48:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:11,058 INFO L482 AbstractCegarLoop]: Abstraction has 12479 states and 68837 transitions. [2021-06-30 11:48:11,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 12479 states and 68837 transitions. [2021-06-30 11:48:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:11,090 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:11,090 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:11,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-30 11:48:11,291 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:11,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1060080993, now seen corresponding path program 6 times [2021-06-30 11:48:11,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:11,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862146363] [2021-06-30 11:48:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:11,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:11,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862146363] [2021-06-30 11:48:11,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862146363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:11,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783778104] [2021-06-30 11:48:11,344 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 [2021-06-30 11:48:11,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:48:11,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:11,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:11,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:11,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783778104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:11,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:11,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:11,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244929033] [2021-06-30 11:48:11,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:11,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:11,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:11,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:11,422 INFO L87 Difference]: Start difference. First operand 12479 states and 68837 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:11,689 INFO L93 Difference]: Finished difference Result 14284 states and 77729 transitions. [2021-06-30 11:48:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:11,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:11,977 INFO L225 Difference]: With dead ends: 14284 [2021-06-30 11:48:11,977 INFO L226 Difference]: Without dead ends: 14161 [2021-06-30 11:48:11,977 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14161 states. [2021-06-30 11:48:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14161 to 12670. [2021-06-30 11:48:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12670 states, 12669 states have (on average 5.518667613860605) internal successors, (69916), 12669 states have internal predecessors, (69916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12670 states to 12670 states and 69916 transitions. [2021-06-30 11:48:12,463 INFO L78 Accepts]: Start accepts. Automaton has 12670 states and 69916 transitions. Word has length 26 [2021-06-30 11:48:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:12,463 INFO L482 AbstractCegarLoop]: Abstraction has 12670 states and 69916 transitions. [2021-06-30 11:48:12,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 12670 states and 69916 transitions. [2021-06-30 11:48:12,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:12,493 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:12,493 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:12,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:12,694 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:12,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1448245551, now seen corresponding path program 7 times [2021-06-30 11:48:12,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:12,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191383545] [2021-06-30 11:48:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:12,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:12,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191383545] [2021-06-30 11:48:12,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191383545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:12,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885739254] [2021-06-30 11:48:12,749 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 [2021-06-30 11:48:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:12,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:12,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885739254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:12,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:12,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:12,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664856559] [2021-06-30 11:48:12,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:12,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:12,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:12,833 INFO L87 Difference]: Start difference. First operand 12670 states and 69916 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:13,204 INFO L93 Difference]: Finished difference Result 14225 states and 77467 transitions. [2021-06-30 11:48:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:13,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:13,262 INFO L225 Difference]: With dead ends: 14225 [2021-06-30 11:48:13,262 INFO L226 Difference]: Without dead ends: 14176 [2021-06-30 11:48:13,262 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2021-06-30 11:48:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 12987. [2021-06-30 11:48:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12987 states, 12986 states have (on average 5.525257970121669) internal successors, (71751), 12986 states have internal predecessors, (71751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12987 states to 12987 states and 71751 transitions. [2021-06-30 11:48:13,709 INFO L78 Accepts]: Start accepts. Automaton has 12987 states and 71751 transitions. Word has length 26 [2021-06-30 11:48:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:13,709 INFO L482 AbstractCegarLoop]: Abstraction has 12987 states and 71751 transitions. [2021-06-30 11:48:13,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 12987 states and 71751 transitions. [2021-06-30 11:48:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:13,741 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:13,741 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:13,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:13,941 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash 151870229, now seen corresponding path program 8 times [2021-06-30 11:48:13,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:13,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634261310] [2021-06-30 11:48:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:13,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:13,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634261310] [2021-06-30 11:48:13,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634261310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:13,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914589420] [2021-06-30 11:48:13,992 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 [2021-06-30 11:48:14,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:14,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:14,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:14,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914589420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:14,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:14,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:14,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849012808] [2021-06-30 11:48:14,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:14,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:14,073 INFO L87 Difference]: Start difference. First operand 12987 states and 71751 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:14,291 INFO L93 Difference]: Finished difference Result 14685 states and 80224 transitions. [2021-06-30 11:48:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:14,487 INFO L225 Difference]: With dead ends: 14685 [2021-06-30 11:48:14,487 INFO L226 Difference]: Without dead ends: 14653 [2021-06-30 11:48:14,487 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14653 states. [2021-06-30 11:48:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14653 to 13479. [2021-06-30 11:48:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 5.5327941831132215) internal successors, (74571), 13478 states have internal predecessors, (74571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 74571 transitions. [2021-06-30 11:48:15,018 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 74571 transitions. Word has length 26 [2021-06-30 11:48:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:15,018 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 74571 transitions. [2021-06-30 11:48:15,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 74571 transitions. [2021-06-30 11:48:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:15,053 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:15,053 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:15,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:15,254 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:15,254 INFO L82 PathProgramCache]: Analyzing trace with hash 948230933, now seen corresponding path program 9 times [2021-06-30 11:48:15,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:15,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723646077] [2021-06-30 11:48:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:15,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:15,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723646077] [2021-06-30 11:48:15,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723646077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:15,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765525709] [2021-06-30 11:48:15,303 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) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:15,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:15,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:15,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:15,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765525709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:15,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:15,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:15,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334215862] [2021-06-30 11:48:15,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:15,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:15,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:15,378 INFO L87 Difference]: Start difference. First operand 13479 states and 74571 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:15,604 INFO L93 Difference]: Finished difference Result 15242 states and 83348 transitions. [2021-06-30 11:48:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:15,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:15,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:15,665 INFO L225 Difference]: With dead ends: 15242 [2021-06-30 11:48:15,665 INFO L226 Difference]: Without dead ends: 15213 [2021-06-30 11:48:15,666 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15213 states. [2021-06-30 11:48:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15213 to 13920. [2021-06-30 11:48:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13920 states, 13919 states have (on average 5.5445793519649405) internal successors, (77175), 13919 states have internal predecessors, (77175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13920 states to 13920 states and 77175 transitions. [2021-06-30 11:48:16,142 INFO L78 Accepts]: Start accepts. Automaton has 13920 states and 77175 transitions. Word has length 26 [2021-06-30 11:48:16,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:16,143 INFO L482 AbstractCegarLoop]: Abstraction has 13920 states and 77175 transitions. [2021-06-30 11:48:16,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:16,143 INFO L276 IsEmpty]: Start isEmpty. Operand 13920 states and 77175 transitions. [2021-06-30 11:48:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:16,175 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:16,175 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:16,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:16,376 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:16,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1300606623, now seen corresponding path program 10 times [2021-06-30 11:48:16,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:16,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126766035] [2021-06-30 11:48:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:16,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:16,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126766035] [2021-06-30 11:48:16,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126766035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:16,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769031476] [2021-06-30 11:48:16,432 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 [2021-06-30 11:48:16,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:16,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:16,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:16,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:16,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769031476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:16,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:16,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:16,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661219198] [2021-06-30 11:48:16,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:16,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:16,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:16,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:16,634 INFO L87 Difference]: Start difference. First operand 13920 states and 77175 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:16,868 INFO L93 Difference]: Finished difference Result 15965 states and 87374 transitions. [2021-06-30 11:48:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:16,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:16,921 INFO L225 Difference]: With dead ends: 15965 [2021-06-30 11:48:16,921 INFO L226 Difference]: Without dead ends: 15838 [2021-06-30 11:48:16,922 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15838 states. [2021-06-30 11:48:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15838 to 14360. [2021-06-30 11:48:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14360 states, 14359 states have (on average 5.556515077651647) internal successors, (79786), 14359 states have internal predecessors, (79786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14360 states to 14360 states and 79786 transitions. [2021-06-30 11:48:17,431 INFO L78 Accepts]: Start accepts. Automaton has 14360 states and 79786 transitions. Word has length 26 [2021-06-30 11:48:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:17,432 INFO L482 AbstractCegarLoop]: Abstraction has 14360 states and 79786 transitions. [2021-06-30 11:48:17,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 14360 states and 79786 transitions. [2021-06-30 11:48:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:17,465 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:17,465 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:17,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-30 11:48:17,666 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash -597522621, now seen corresponding path program 1 times [2021-06-30 11:48:17,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:17,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888775908] [2021-06-30 11:48:17,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:17,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:17,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888775908] [2021-06-30 11:48:17,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888775908] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:17,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:17,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:17,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843745775] [2021-06-30 11:48:17,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:17,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:17,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:17,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:17,718 INFO L87 Difference]: Start difference. First operand 14360 states and 79786 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:18,041 INFO L93 Difference]: Finished difference Result 15700 states and 86180 transitions. [2021-06-30 11:48:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:18,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:18,119 INFO L225 Difference]: With dead ends: 15700 [2021-06-30 11:48:18,119 INFO L226 Difference]: Without dead ends: 15675 [2021-06-30 11:48:18,119 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15675 states. [2021-06-30 11:48:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15675 to 14635. [2021-06-30 11:48:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14635 states, 14634 states have (on average 5.560475604756047) internal successors, (81372), 14634 states have internal predecessors, (81372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14635 states to 14635 states and 81372 transitions. [2021-06-30 11:48:18,626 INFO L78 Accepts]: Start accepts. Automaton has 14635 states and 81372 transitions. Word has length 26 [2021-06-30 11:48:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:18,627 INFO L482 AbstractCegarLoop]: Abstraction has 14635 states and 81372 transitions. [2021-06-30 11:48:18,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 14635 states and 81372 transitions. [2021-06-30 11:48:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:18,661 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:18,661 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:18,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-30 11:48:18,661 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:18,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:18,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1288429187, now seen corresponding path program 2 times [2021-06-30 11:48:18,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:18,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806809890] [2021-06-30 11:48:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:18,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:18,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806809890] [2021-06-30 11:48:18,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806809890] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:18,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:18,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:18,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245164330] [2021-06-30 11:48:18,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:18,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:18,697 INFO L87 Difference]: Start difference. First operand 14635 states and 81372 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:18,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:18,902 INFO L93 Difference]: Finished difference Result 15756 states and 86777 transitions. [2021-06-30 11:48:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:18,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:18,954 INFO L225 Difference]: With dead ends: 15756 [2021-06-30 11:48:18,954 INFO L226 Difference]: Without dead ends: 15747 [2021-06-30 11:48:18,954 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:19,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15747 states. [2021-06-30 11:48:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15747 to 14911. [2021-06-30 11:48:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14911 states, 14910 states have (on average 5.564252179745138) internal successors, (82963), 14910 states have internal predecessors, (82963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14911 states to 14911 states and 82963 transitions. [2021-06-30 11:48:19,464 INFO L78 Accepts]: Start accepts. Automaton has 14911 states and 82963 transitions. Word has length 26 [2021-06-30 11:48:19,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:19,464 INFO L482 AbstractCegarLoop]: Abstraction has 14911 states and 82963 transitions. [2021-06-30 11:48:19,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 14911 states and 82963 transitions. [2021-06-30 11:48:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:19,501 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:19,501 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:19,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-30 11:48:19,501 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1945194951, now seen corresponding path program 3 times [2021-06-30 11:48:19,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:19,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845117653] [2021-06-30 11:48:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:19,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:19,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845117653] [2021-06-30 11:48:19,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845117653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:19,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887206890] [2021-06-30 11:48:19,544 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 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 [2021-06-30 11:48:19,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:19,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:19,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:19,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:19,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887206890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:19,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:19,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:19,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799055748] [2021-06-30 11:48:19,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:19,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:19,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:19,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:19,616 INFO L87 Difference]: Start difference. First operand 14911 states and 82963 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:19,989 INFO L93 Difference]: Finished difference Result 16150 states and 88742 transitions. [2021-06-30 11:48:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:19,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:20,063 INFO L225 Difference]: With dead ends: 16150 [2021-06-30 11:48:20,063 INFO L226 Difference]: Without dead ends: 16095 [2021-06-30 11:48:20,064 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16095 states. [2021-06-30 11:48:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16095 to 14476. [2021-06-30 11:48:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14476 states, 14475 states have (on average 5.557374784110535) internal successors, (80443), 14475 states have internal predecessors, (80443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14476 states to 14476 states and 80443 transitions. [2021-06-30 11:48:20,579 INFO L78 Accepts]: Start accepts. Automaton has 14476 states and 80443 transitions. Word has length 26 [2021-06-30 11:48:20,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:20,580 INFO L482 AbstractCegarLoop]: Abstraction has 14476 states and 80443 transitions. [2021-06-30 11:48:20,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 14476 states and 80443 transitions. [2021-06-30 11:48:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:20,616 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:20,616 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:20,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-30 11:48:20,816 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:20,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:20,817 INFO L82 PathProgramCache]: Analyzing trace with hash -806903033, now seen corresponding path program 4 times [2021-06-30 11:48:20,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:20,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012909352] [2021-06-30 11:48:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:20,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:20,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012909352] [2021-06-30 11:48:20,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012909352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:20,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420118442] [2021-06-30 11:48:20,862 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 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 [2021-06-30 11:48:20,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:20,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:20,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:20,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:20,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420118442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:20,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:20,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:20,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737657066] [2021-06-30 11:48:20,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:20,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:20,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:20,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:20,928 INFO L87 Difference]: Start difference. First operand 14476 states and 80443 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:21,130 INFO L93 Difference]: Finished difference Result 16189 states and 88696 transitions. [2021-06-30 11:48:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:21,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:21,356 INFO L225 Difference]: With dead ends: 16189 [2021-06-30 11:48:21,357 INFO L226 Difference]: Without dead ends: 16130 [2021-06-30 11:48:21,357 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16130 states. [2021-06-30 11:48:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16130 to 14930. [2021-06-30 11:48:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14930 states, 14929 states have (on average 5.560586777413088) internal successors, (83014), 14929 states have internal predecessors, (83014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14930 states to 14930 states and 83014 transitions. [2021-06-30 11:48:21,927 INFO L78 Accepts]: Start accepts. Automaton has 14930 states and 83014 transitions. Word has length 26 [2021-06-30 11:48:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:21,927 INFO L482 AbstractCegarLoop]: Abstraction has 14930 states and 83014 transitions. [2021-06-30 11:48:21,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 14930 states and 83014 transitions. [2021-06-30 11:48:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:21,966 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:21,966 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:22,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-30 11:48:22,167 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:22,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1325458237, now seen corresponding path program 5 times [2021-06-30 11:48:22,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:22,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33009753] [2021-06-30 11:48:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:22,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:22,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33009753] [2021-06-30 11:48:22,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33009753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:22,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185132950] [2021-06-30 11:48:22,222 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 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 [2021-06-30 11:48:22,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:22,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:22,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:22,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185132950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:22,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:22,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:22,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580923717] [2021-06-30 11:48:22,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:22,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:22,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:22,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:22,285 INFO L87 Difference]: Start difference. First operand 14930 states and 83014 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:22,485 INFO L93 Difference]: Finished difference Result 16348 states and 89827 transitions. [2021-06-30 11:48:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:22,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:22,548 INFO L225 Difference]: With dead ends: 16348 [2021-06-30 11:48:22,548 INFO L226 Difference]: Without dead ends: 16317 [2021-06-30 11:48:22,548 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16317 states. [2021-06-30 11:48:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16317 to 15373. [2021-06-30 11:48:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15373 states, 15372 states have (on average 5.558548009367682) internal successors, (85446), 15372 states have internal predecessors, (85446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15373 states to 15373 states and 85446 transitions. [2021-06-30 11:48:23,138 INFO L78 Accepts]: Start accepts. Automaton has 15373 states and 85446 transitions. Word has length 26 [2021-06-30 11:48:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:23,138 INFO L482 AbstractCegarLoop]: Abstraction has 15373 states and 85446 transitions. [2021-06-30 11:48:23,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 15373 states and 85446 transitions. [2021-06-30 11:48:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:23,173 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:23,173 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:23,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:23,377 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1340919033, now seen corresponding path program 6 times [2021-06-30 11:48:23,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:23,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821495021] [2021-06-30 11:48:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:23,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:23,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821495021] [2021-06-30 11:48:23,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821495021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:23,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909856170] [2021-06-30 11:48:23,429 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 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 [2021-06-30 11:48:23,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:48:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:23,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909856170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:23,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:23,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:23,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521137531] [2021-06-30 11:48:23,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:23,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:23,502 INFO L87 Difference]: Start difference. First operand 15373 states and 85446 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:23,902 INFO L93 Difference]: Finished difference Result 16768 states and 91954 transitions. [2021-06-30 11:48:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:23,958 INFO L225 Difference]: With dead ends: 16768 [2021-06-30 11:48:23,958 INFO L226 Difference]: Without dead ends: 16631 [2021-06-30 11:48:23,958 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16631 states. [2021-06-30 11:48:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16631 to 14636. [2021-06-30 11:48:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14636 states, 14635 states have (on average 5.5553126067646055) internal successors, (81302), 14635 states have internal predecessors, (81302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14636 states to 14636 states and 81302 transitions. [2021-06-30 11:48:24,468 INFO L78 Accepts]: Start accepts. Automaton has 14636 states and 81302 transitions. Word has length 26 [2021-06-30 11:48:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:24,468 INFO L482 AbstractCegarLoop]: Abstraction has 14636 states and 81302 transitions. [2021-06-30 11:48:24,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 14636 states and 81302 transitions. [2021-06-30 11:48:24,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:24,506 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:24,506 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:24,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:24,706 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:24,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:24,707 INFO L82 PathProgramCache]: Analyzing trace with hash -270696189, now seen corresponding path program 7 times [2021-06-30 11:48:24,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:24,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682126062] [2021-06-30 11:48:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:24,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:24,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682126062] [2021-06-30 11:48:24,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682126062] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:24,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:24,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:24,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221093292] [2021-06-30 11:48:24,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:24,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:24,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:24,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:24,742 INFO L87 Difference]: Start difference. First operand 14636 states and 81302 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:24,963 INFO L93 Difference]: Finished difference Result 15545 states and 85640 transitions. [2021-06-30 11:48:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:24,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:24,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:25,029 INFO L225 Difference]: With dead ends: 15545 [2021-06-30 11:48:25,029 INFO L226 Difference]: Without dead ends: 15536 [2021-06-30 11:48:25,029 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2021-06-30 11:48:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 14783. [2021-06-30 11:48:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14783 states, 14782 states have (on average 5.558855364632661) internal successors, (82171), 14782 states have internal predecessors, (82171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14783 states to 14783 states and 82171 transitions. [2021-06-30 11:48:25,584 INFO L78 Accepts]: Start accepts. Automaton has 14783 states and 82171 transitions. Word has length 26 [2021-06-30 11:48:25,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:25,585 INFO L482 AbstractCegarLoop]: Abstraction has 14783 states and 82171 transitions. [2021-06-30 11:48:25,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 14783 states and 82171 transitions. [2021-06-30 11:48:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:25,623 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:25,623 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:25,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-06-30 11:48:25,624 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:25,624 INFO L82 PathProgramCache]: Analyzing trace with hash -446569657, now seen corresponding path program 8 times [2021-06-30 11:48:25,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:25,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547494446] [2021-06-30 11:48:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:25,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547494446] [2021-06-30 11:48:25,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547494446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379787966] [2021-06-30 11:48:25,662 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 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 [2021-06-30 11:48:25,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:25,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:25,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379787966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:25,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:25,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:25,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575724479] [2021-06-30 11:48:25,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:25,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:25,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:25,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:25,723 INFO L87 Difference]: Start difference. First operand 14783 states and 82171 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:26,072 INFO L93 Difference]: Finished difference Result 15995 states and 87856 transitions. [2021-06-30 11:48:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:26,136 INFO L225 Difference]: With dead ends: 15995 [2021-06-30 11:48:26,136 INFO L226 Difference]: Without dead ends: 15958 [2021-06-30 11:48:26,136 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15958 states. [2021-06-30 11:48:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15958 to 14867. [2021-06-30 11:48:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14867 states, 14866 states have (on average 5.557311987084622) internal successors, (82615), 14866 states have internal predecessors, (82615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14867 states to 14867 states and 82615 transitions. [2021-06-30 11:48:26,792 INFO L78 Accepts]: Start accepts. Automaton has 14867 states and 82615 transitions. Word has length 26 [2021-06-30 11:48:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:26,792 INFO L482 AbstractCegarLoop]: Abstraction has 14867 states and 82615 transitions. [2021-06-30 11:48:26,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 14867 states and 82615 transitions. [2021-06-30 11:48:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:26,827 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:26,827 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:27,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:27,028 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2125780295, now seen corresponding path program 9 times [2021-06-30 11:48:27,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:27,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599376893] [2021-06-30 11:48:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:27,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:27,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599376893] [2021-06-30 11:48:27,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599376893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:27,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595808950] [2021-06-30 11:48:27,082 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 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 [2021-06-30 11:48:27,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:48:27,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:27,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:27,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595808950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:27,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:27,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:27,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423817616] [2021-06-30 11:48:27,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:27,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:27,151 INFO L87 Difference]: Start difference. First operand 14867 states and 82615 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:27,367 INFO L93 Difference]: Finished difference Result 16187 states and 89079 transitions. [2021-06-30 11:48:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:27,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:27,423 INFO L225 Difference]: With dead ends: 16187 [2021-06-30 11:48:27,423 INFO L226 Difference]: Without dead ends: 16178 [2021-06-30 11:48:27,423 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16178 states. [2021-06-30 11:48:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16178 to 15200. [2021-06-30 11:48:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15200 states, 15199 states have (on average 5.564708204487137) internal successors, (84578), 15199 states have internal predecessors, (84578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 84578 transitions. [2021-06-30 11:48:27,958 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 84578 transitions. Word has length 26 [2021-06-30 11:48:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:27,958 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 84578 transitions. [2021-06-30 11:48:27,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 84578 transitions. [2021-06-30 11:48:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:27,995 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:27,995 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:28,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:28,196 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:28,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1730466887, now seen corresponding path program 10 times [2021-06-30 11:48:28,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:28,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749357330] [2021-06-30 11:48:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:28,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749357330] [2021-06-30 11:48:28,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749357330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918831425] [2021-06-30 11:48:28,259 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 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 [2021-06-30 11:48:28,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:28,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:28,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918831425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:28,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:28,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:28,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432434234] [2021-06-30 11:48:28,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:28,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:28,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:28,329 INFO L87 Difference]: Start difference. First operand 15200 states and 84578 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:28,744 INFO L93 Difference]: Finished difference Result 16528 states and 90846 transitions. [2021-06-30 11:48:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:28,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:28,808 INFO L225 Difference]: With dead ends: 16528 [2021-06-30 11:48:28,808 INFO L226 Difference]: Without dead ends: 16487 [2021-06-30 11:48:28,808 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16487 states. [2021-06-30 11:48:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16487 to 14972. [2021-06-30 11:48:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14972 states, 14971 states have (on average 5.560483601629818) internal successors, (83246), 14971 states have internal predecessors, (83246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14972 states to 14972 states and 83246 transitions. [2021-06-30 11:48:29,432 INFO L78 Accepts]: Start accepts. Automaton has 14972 states and 83246 transitions. Word has length 26 [2021-06-30 11:48:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:29,433 INFO L482 AbstractCegarLoop]: Abstraction has 14972 states and 83246 transitions. [2021-06-30 11:48:29,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 14972 states and 83246 transitions. [2021-06-30 11:48:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:29,476 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:29,477 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:29,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-30 11:48:29,677 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:29,677 INFO L82 PathProgramCache]: Analyzing trace with hash -654862965, now seen corresponding path program 11 times [2021-06-30 11:48:29,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:29,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537556114] [2021-06-30 11:48:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:29,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:29,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537556114] [2021-06-30 11:48:29,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537556114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:29,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574718811] [2021-06-30 11:48:29,734 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 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 [2021-06-30 11:48:29,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:48:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:29,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:29,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574718811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:29,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:29,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:29,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594583931] [2021-06-30 11:48:29,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:29,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:29,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:29,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:29,804 INFO L87 Difference]: Start difference. First operand 14972 states and 83246 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:30,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:30,058 INFO L93 Difference]: Finished difference Result 16425 states and 90229 transitions. [2021-06-30 11:48:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:30,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:30,113 INFO L225 Difference]: With dead ends: 16425 [2021-06-30 11:48:30,113 INFO L226 Difference]: Without dead ends: 16398 [2021-06-30 11:48:30,113 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16398 states. [2021-06-30 11:48:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16398 to 15140. [2021-06-30 11:48:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15140 states, 15139 states have (on average 5.5604068960961754) internal successors, (84179), 15139 states have internal predecessors, (84179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15140 states to 15140 states and 84179 transitions. [2021-06-30 11:48:30,675 INFO L78 Accepts]: Start accepts. Automaton has 15140 states and 84179 transitions. Word has length 26 [2021-06-30 11:48:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:30,675 INFO L482 AbstractCegarLoop]: Abstraction has 15140 states and 84179 transitions. [2021-06-30 11:48:30,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 15140 states and 84179 transitions. [2021-06-30 11:48:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:30,710 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:30,710 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:30,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:30,910 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:30,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1685935929, now seen corresponding path program 12 times [2021-06-30 11:48:30,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:30,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683807230] [2021-06-30 11:48:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:30,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683807230] [2021-06-30 11:48:30,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683807230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592511696] [2021-06-30 11:48:30,955 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 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 [2021-06-30 11:48:30,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:48:30,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:30,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:31,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592511696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:31,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:31,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:31,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945235900] [2021-06-30 11:48:31,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:31,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:31,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:31,015 INFO L87 Difference]: Start difference. First operand 15140 states and 84179 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:31,237 INFO L93 Difference]: Finished difference Result 16984 states and 93352 transitions. [2021-06-30 11:48:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:31,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:31,489 INFO L225 Difference]: With dead ends: 16984 [2021-06-30 11:48:31,489 INFO L226 Difference]: Without dead ends: 16959 [2021-06-30 11:48:31,490 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16959 states. [2021-06-30 11:48:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16959 to 15722. [2021-06-30 11:48:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15722 states, 15721 states have (on average 5.5682208510908975) internal successors, (87538), 15721 states have internal predecessors, (87538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15722 states to 15722 states and 87538 transitions. [2021-06-30 11:48:31,892 INFO L78 Accepts]: Start accepts. Automaton has 15722 states and 87538 transitions. Word has length 26 [2021-06-30 11:48:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:31,892 INFO L482 AbstractCegarLoop]: Abstraction has 15722 states and 87538 transitions. [2021-06-30 11:48:31,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 15722 states and 87538 transitions. [2021-06-30 11:48:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:31,932 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:31,932 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-30 11:48:32,133 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1097575449, now seen corresponding path program 13 times [2021-06-30 11:48:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:32,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815579074] [2021-06-30 11:48:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:32,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:32,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815579074] [2021-06-30 11:48:32,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815579074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:32,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423521935] [2021-06-30 11:48:32,176 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 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 [2021-06-30 11:48:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:32,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:32,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423521935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:32,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:32,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:32,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133412321] [2021-06-30 11:48:32,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:32,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:32,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:32,411 INFO L87 Difference]: Start difference. First operand 15722 states and 87538 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:32,607 INFO L93 Difference]: Finished difference Result 17067 states and 94000 transitions. [2021-06-30 11:48:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:32,676 INFO L225 Difference]: With dead ends: 17067 [2021-06-30 11:48:32,676 INFO L226 Difference]: Without dead ends: 17030 [2021-06-30 11:48:32,676 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17030 states. [2021-06-30 11:48:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17030 to 16073. [2021-06-30 11:48:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16073 states, 16072 states have (on average 5.569188651070184) internal successors, (89508), 16072 states have internal predecessors, (89508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16073 states to 16073 states and 89508 transitions. [2021-06-30 11:48:33,228 INFO L78 Accepts]: Start accepts. Automaton has 16073 states and 89508 transitions. Word has length 26 [2021-06-30 11:48:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:33,228 INFO L482 AbstractCegarLoop]: Abstraction has 16073 states and 89508 transitions. [2021-06-30 11:48:33,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 16073 states and 89508 transitions. [2021-06-30 11:48:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:33,269 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:33,269 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:33,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-30 11:48:33,469 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:33,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1324796829, now seen corresponding path program 14 times [2021-06-30 11:48:33,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:33,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124952762] [2021-06-30 11:48:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:33,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:33,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124952762] [2021-06-30 11:48:33,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124952762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:33,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220324562] [2021-06-30 11:48:33,524 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:33,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:33,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:33,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:33,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:33,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220324562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:33,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:33,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:33,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544104183] [2021-06-30 11:48:33,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:33,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:33,595 INFO L87 Difference]: Start difference. First operand 16073 states and 89508 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:33,852 INFO L93 Difference]: Finished difference Result 17729 states and 97599 transitions. [2021-06-30 11:48:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:33,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:33,911 INFO L225 Difference]: With dead ends: 17729 [2021-06-30 11:48:33,911 INFO L226 Difference]: Without dead ends: 17692 [2021-06-30 11:48:33,911 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17692 states. [2021-06-30 11:48:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17692 to 16199. [2021-06-30 11:48:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16199 states, 16198 states have (on average 5.571984195579701) internal successors, (90255), 16198 states have internal predecessors, (90255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16199 states to 16199 states and 90255 transitions. [2021-06-30 11:48:34,488 INFO L78 Accepts]: Start accepts. Automaton has 16199 states and 90255 transitions. Word has length 26 [2021-06-30 11:48:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:34,488 INFO L482 AbstractCegarLoop]: Abstraction has 16199 states and 90255 transitions. [2021-06-30 11:48:34,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 16199 states and 90255 transitions. [2021-06-30 11:48:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:34,525 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:34,525 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:34,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:34,729 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1533090137, now seen corresponding path program 15 times [2021-06-30 11:48:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:34,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564536227] [2021-06-30 11:48:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:34,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:34,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564536227] [2021-06-30 11:48:34,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564536227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:34,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330954034] [2021-06-30 11:48:34,773 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 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 [2021-06-30 11:48:34,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:48:34,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:34,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:34,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:34,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330954034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:34,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:34,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:34,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037410604] [2021-06-30 11:48:34,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:34,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:34,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:34,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:34,834 INFO L87 Difference]: Start difference. First operand 16199 states and 90255 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:35,248 INFO L93 Difference]: Finished difference Result 18255 states and 100576 transitions. [2021-06-30 11:48:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:35,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:35,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:35,318 INFO L225 Difference]: With dead ends: 18255 [2021-06-30 11:48:35,318 INFO L226 Difference]: Without dead ends: 18237 [2021-06-30 11:48:35,318 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18237 states. [2021-06-30 11:48:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18237 to 16904. [2021-06-30 11:48:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16904 states, 16903 states have (on average 5.5861681358338755) internal successors, (94423), 16903 states have internal predecessors, (94423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16904 states to 16904 states and 94423 transitions. [2021-06-30 11:48:35,952 INFO L78 Accepts]: Start accepts. Automaton has 16904 states and 94423 transitions. Word has length 26 [2021-06-30 11:48:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:35,952 INFO L482 AbstractCegarLoop]: Abstraction has 16904 states and 94423 transitions. [2021-06-30 11:48:35,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 16904 states and 94423 transitions. [2021-06-30 11:48:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:35,999 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:36,000 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:36,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-30 11:48:36,200 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1730804195, now seen corresponding path program 16 times [2021-06-30 11:48:36,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:36,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137814523] [2021-06-30 11:48:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:36,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:36,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137814523] [2021-06-30 11:48:36,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137814523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044012891] [2021-06-30 11:48:36,264 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 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 [2021-06-30 11:48:36,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:36,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:36,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:36,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:36,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044012891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:36,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:36,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:36,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362321435] [2021-06-30 11:48:36,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:36,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:36,325 INFO L87 Difference]: Start difference. First operand 16904 states and 94423 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:36,566 INFO L93 Difference]: Finished difference Result 19041 states and 105245 transitions. [2021-06-30 11:48:36,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:36,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:36,624 INFO L225 Difference]: With dead ends: 19041 [2021-06-30 11:48:36,624 INFO L226 Difference]: Without dead ends: 18992 [2021-06-30 11:48:36,624 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18992 states. [2021-06-30 11:48:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18992 to 17546. [2021-06-30 11:48:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17546 states, 17545 states have (on average 5.602564833285836) internal successors, (98297), 17545 states have internal predecessors, (98297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17546 states to 17546 states and 98297 transitions. [2021-06-30 11:48:37,267 INFO L78 Accepts]: Start accepts. Automaton has 17546 states and 98297 transitions. Word has length 26 [2021-06-30 11:48:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:37,267 INFO L482 AbstractCegarLoop]: Abstraction has 17546 states and 98297 transitions. [2021-06-30 11:48:37,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 17546 states and 98297 transitions. [2021-06-30 11:48:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:37,309 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:37,309 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:37,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:37,510 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:37,510 INFO L82 PathProgramCache]: Analyzing trace with hash -646570315, now seen corresponding path program 17 times [2021-06-30 11:48:37,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:37,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171804798] [2021-06-30 11:48:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:37,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171804798] [2021-06-30 11:48:37,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171804798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818632743] [2021-06-30 11:48:37,553 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 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 [2021-06-30 11:48:37,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:48:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:37,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818632743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:37,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:37,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:37,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178990364] [2021-06-30 11:48:37,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:37,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:37,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:37,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:37,627 INFO L87 Difference]: Start difference. First operand 17546 states and 98297 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:38,101 INFO L93 Difference]: Finished difference Result 19763 states and 109340 transitions. [2021-06-30 11:48:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:38,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:38,178 INFO L225 Difference]: With dead ends: 19763 [2021-06-30 11:48:38,178 INFO L226 Difference]: Without dead ends: 19696 [2021-06-30 11:48:38,179 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19696 states. [2021-06-30 11:48:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19696 to 18386. [2021-06-30 11:48:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18386 states, 18385 states have (on average 5.606799020940985) internal successors, (103081), 18385 states have internal predecessors, (103081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18386 states to 18386 states and 103081 transitions. [2021-06-30 11:48:38,828 INFO L78 Accepts]: Start accepts. Automaton has 18386 states and 103081 transitions. Word has length 26 [2021-06-30 11:48:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:38,828 INFO L482 AbstractCegarLoop]: Abstraction has 18386 states and 103081 transitions. [2021-06-30 11:48:38,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 18386 states and 103081 transitions. [2021-06-30 11:48:38,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:38,872 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:38,873 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:39,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-06-30 11:48:39,075 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:39,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1424309945, now seen corresponding path program 18 times [2021-06-30 11:48:39,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:39,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648955095] [2021-06-30 11:48:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:39,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:39,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648955095] [2021-06-30 11:48:39,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648955095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:39,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076990731] [2021-06-30 11:48:39,140 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 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 [2021-06-30 11:48:39,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:48:39,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:39,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:39,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076990731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:39,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:39,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236492299] [2021-06-30 11:48:39,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:39,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:39,202 INFO L87 Difference]: Start difference. First operand 18386 states and 103081 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:39,455 INFO L93 Difference]: Finished difference Result 20642 states and 114202 transitions. [2021-06-30 11:48:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:39,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:39,538 INFO L225 Difference]: With dead ends: 20642 [2021-06-30 11:48:39,538 INFO L226 Difference]: Without dead ends: 20434 [2021-06-30 11:48:39,538 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20434 states. [2021-06-30 11:48:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20434 to 18347. [2021-06-30 11:48:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18347 states, 18346 states have (on average 5.619808132562956) internal successors, (103101), 18346 states have internal predecessors, (103101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18347 states to 18347 states and 103101 transitions. [2021-06-30 11:48:40,223 INFO L78 Accepts]: Start accepts. Automaton has 18347 states and 103101 transitions. Word has length 26 [2021-06-30 11:48:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:40,224 INFO L482 AbstractCegarLoop]: Abstraction has 18347 states and 103101 transitions. [2021-06-30 11:48:40,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 18347 states and 103101 transitions. [2021-06-30 11:48:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:40,275 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:40,275 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:40,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:40,476 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:40,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1591731031, now seen corresponding path program 1 times [2021-06-30 11:48:40,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:40,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539386472] [2021-06-30 11:48:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:40,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:40,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539386472] [2021-06-30 11:48:40,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539386472] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:40,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:40,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:40,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409459925] [2021-06-30 11:48:40,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:40,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:40,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:40,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:40,507 INFO L87 Difference]: Start difference. First operand 18347 states and 103101 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:40,914 INFO L93 Difference]: Finished difference Result 19622 states and 109055 transitions. [2021-06-30 11:48:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:40,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:40,999 INFO L225 Difference]: With dead ends: 19622 [2021-06-30 11:48:40,999 INFO L226 Difference]: Without dead ends: 19597 [2021-06-30 11:48:40,999 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-06-30 11:48:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 18592. [2021-06-30 11:48:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18592 states, 18591 states have (on average 5.621106987251896) internal successors, (104502), 18591 states have internal predecessors, (104502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18592 states to 18592 states and 104502 transitions. [2021-06-30 11:48:41,724 INFO L78 Accepts]: Start accepts. Automaton has 18592 states and 104502 transitions. Word has length 26 [2021-06-30 11:48:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:41,725 INFO L482 AbstractCegarLoop]: Abstraction has 18592 states and 104502 transitions. [2021-06-30 11:48:41,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18592 states and 104502 transitions. [2021-06-30 11:48:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:41,777 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:41,777 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:41,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-06-30 11:48:41,777 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -817284457, now seen corresponding path program 2 times [2021-06-30 11:48:41,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:41,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112038379] [2021-06-30 11:48:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:41,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:41,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112038379] [2021-06-30 11:48:41,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112038379] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:41,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:41,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:41,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275474171] [2021-06-30 11:48:41,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:41,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:41,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:41,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:41,822 INFO L87 Difference]: Start difference. First operand 18592 states and 104502 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:42,020 INFO L93 Difference]: Finished difference Result 19686 states and 109652 transitions. [2021-06-30 11:48:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:42,097 INFO L225 Difference]: With dead ends: 19686 [2021-06-30 11:48:42,097 INFO L226 Difference]: Without dead ends: 19677 [2021-06-30 11:48:42,097 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19677 states. [2021-06-30 11:48:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19677 to 18802. [2021-06-30 11:48:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18802 states, 18801 states have (on average 5.623690229243126) internal successors, (105731), 18801 states have internal predecessors, (105731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18802 states to 18802 states and 105731 transitions. [2021-06-30 11:48:42,784 INFO L78 Accepts]: Start accepts. Automaton has 18802 states and 105731 transitions. Word has length 26 [2021-06-30 11:48:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:42,784 INFO L482 AbstractCegarLoop]: Abstraction has 18802 states and 105731 transitions. [2021-06-30 11:48:42,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 18802 states and 105731 transitions. [2021-06-30 11:48:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:42,833 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:42,833 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:42,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-06-30 11:48:42,833 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash -160518693, now seen corresponding path program 3 times [2021-06-30 11:48:42,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:42,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544728999] [2021-06-30 11:48:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:42,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:42,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544728999] [2021-06-30 11:48:42,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544728999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:42,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314265332] [2021-06-30 11:48:42,871 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 [2021-06-30 11:48:42,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:42,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:42,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:42,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:42,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314265332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:42,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:42,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:42,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398605830] [2021-06-30 11:48:42,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:42,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:42,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:42,933 INFO L87 Difference]: Start difference. First operand 18802 states and 105731 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:43,348 INFO L93 Difference]: Finished difference Result 20204 states and 112183 transitions. [2021-06-30 11:48:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:43,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:43,426 INFO L225 Difference]: With dead ends: 20204 [2021-06-30 11:48:43,426 INFO L226 Difference]: Without dead ends: 20149 [2021-06-30 11:48:43,427 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20149 states. [2021-06-30 11:48:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20149 to 18571. [2021-06-30 11:48:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18571 states, 18570 states have (on average 5.621378567582122) internal successors, (104389), 18570 states have internal predecessors, (104389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18571 states to 18571 states and 104389 transitions. [2021-06-30 11:48:44,144 INFO L78 Accepts]: Start accepts. Automaton has 18571 states and 104389 transitions. Word has length 26 [2021-06-30 11:48:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:44,144 INFO L482 AbstractCegarLoop]: Abstraction has 18571 states and 104389 transitions. [2021-06-30 11:48:44,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 18571 states and 104389 transitions. [2021-06-30 11:48:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:44,190 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:44,190 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:44,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-30 11:48:44,393 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1791805797, now seen corresponding path program 4 times [2021-06-30 11:48:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:44,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520292880] [2021-06-30 11:48:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:44,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:44,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520292880] [2021-06-30 11:48:44,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520292880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:44,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686248525] [2021-06-30 11:48:44,441 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 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 [2021-06-30 11:48:44,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:44,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:44,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:44,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:44,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686248525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:44,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:44,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:44,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180125647] [2021-06-30 11:48:44,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:44,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:44,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:44,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:44,526 INFO L87 Difference]: Start difference. First operand 18571 states and 104389 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:44,747 INFO L93 Difference]: Finished difference Result 20294 states and 112717 transitions. [2021-06-30 11:48:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:44,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:44,825 INFO L225 Difference]: With dead ends: 20294 [2021-06-30 11:48:44,826 INFO L226 Difference]: Without dead ends: 20239 [2021-06-30 11:48:44,826 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20239 states. [2021-06-30 11:48:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20239 to 18982. [2021-06-30 11:48:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18982 states, 18981 states have (on average 5.629945735208893) internal successors, (106862), 18981 states have internal predecessors, (106862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18982 states to 18982 states and 106862 transitions. [2021-06-30 11:48:45,631 INFO L78 Accepts]: Start accepts. Automaton has 18982 states and 106862 transitions. Word has length 26 [2021-06-30 11:48:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:45,631 INFO L482 AbstractCegarLoop]: Abstraction has 18982 states and 106862 transitions. [2021-06-30 11:48:45,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 18982 states and 106862 transitions. [2021-06-30 11:48:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:45,678 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:45,678 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:45,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:45,879 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:45,879 INFO L82 PathProgramCache]: Analyzing trace with hash -117435941, now seen corresponding path program 5 times [2021-06-30 11:48:45,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:45,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886397887] [2021-06-30 11:48:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:45,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:45,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886397887] [2021-06-30 11:48:45,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886397887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:45,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890073832] [2021-06-30 11:48:45,922 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 [2021-06-30 11:48:45,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:45,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:45,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890073832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:45,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:45,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:45,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330024232] [2021-06-30 11:48:45,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:45,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:45,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:45,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:45,997 INFO L87 Difference]: Start difference. First operand 18982 states and 106862 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:46,405 INFO L93 Difference]: Finished difference Result 20389 states and 113606 transitions. [2021-06-30 11:48:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:46,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:46,487 INFO L225 Difference]: With dead ends: 20389 [2021-06-30 11:48:46,487 INFO L226 Difference]: Without dead ends: 20361 [2021-06-30 11:48:46,488 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20361 states. [2021-06-30 11:48:47,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20361 to 19404. [2021-06-30 11:48:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19404 states, 19403 states have (on average 5.628150286038242) internal successors, (109203), 19403 states have internal predecessors, (109203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19404 states to 19404 states and 109203 transitions. [2021-06-30 11:48:47,192 INFO L78 Accepts]: Start accepts. Automaton has 19404 states and 109203 transitions. Word has length 26 [2021-06-30 11:48:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:47,192 INFO L482 AbstractCegarLoop]: Abstraction has 19404 states and 109203 transitions. [2021-06-30 11:48:47,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 19404 states and 109203 transitions. [2021-06-30 11:48:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:47,245 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:47,245 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:47,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-30 11:48:47,447 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:47,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1678006039, now seen corresponding path program 6 times [2021-06-30 11:48:47,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:47,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288821284] [2021-06-30 11:48:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:47,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:47,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288821284] [2021-06-30 11:48:47,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288821284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:47,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777636343] [2021-06-30 11:48:47,496 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 [2021-06-30 11:48:47,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:48:47,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:47,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:47,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777636343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:47,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:47,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:47,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319645500] [2021-06-30 11:48:47,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:47,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:47,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:47,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:47,559 INFO L87 Difference]: Start difference. First operand 19404 states and 109203 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:47,806 INFO L93 Difference]: Finished difference Result 20840 states and 115839 transitions. [2021-06-30 11:48:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:47,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:47,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:47,885 INFO L225 Difference]: With dead ends: 20840 [2021-06-30 11:48:47,885 INFO L226 Difference]: Without dead ends: 20736 [2021-06-30 11:48:47,885 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20736 states. [2021-06-30 11:48:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20736 to 18679. [2021-06-30 11:48:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18679 states, 18678 states have (on average 5.626994324874183) internal successors, (105101), 18678 states have internal predecessors, (105101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18679 states to 18679 states and 105101 transitions. [2021-06-30 11:48:48,650 INFO L78 Accepts]: Start accepts. Automaton has 18679 states and 105101 transitions. Word has length 26 [2021-06-30 11:48:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:48,650 INFO L482 AbstractCegarLoop]: Abstraction has 18679 states and 105101 transitions. [2021-06-30 11:48:48,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 18679 states and 105101 transitions. [2021-06-30 11:48:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:48,694 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:48,694 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:48,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:48,895 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:48,895 INFO L82 PathProgramCache]: Analyzing trace with hash -654663273, now seen corresponding path program 7 times [2021-06-30 11:48:48,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:48,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498021463] [2021-06-30 11:48:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:48,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:48,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498021463] [2021-06-30 11:48:48,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498021463] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:48,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:48,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:48,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797140831] [2021-06-30 11:48:48,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:48,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:48,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:48,936 INFO L87 Difference]: Start difference. First operand 18679 states and 105101 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:49,378 INFO L93 Difference]: Finished difference Result 19597 states and 109444 transitions. [2021-06-30 11:48:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:49,466 INFO L225 Difference]: With dead ends: 19597 [2021-06-30 11:48:49,466 INFO L226 Difference]: Without dead ends: 19588 [2021-06-30 11:48:49,466 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19588 states. [2021-06-30 11:48:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19588 to 18823. [2021-06-30 11:48:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18823 states, 18822 states have (on average 5.628838593135693) internal successors, (105946), 18822 states have internal predecessors, (105946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18823 states to 18823 states and 105946 transitions. [2021-06-30 11:48:50,274 INFO L78 Accepts]: Start accepts. Automaton has 18823 states and 105946 transitions. Word has length 26 [2021-06-30 11:48:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:50,274 INFO L482 AbstractCegarLoop]: Abstraction has 18823 states and 105946 transitions. [2021-06-30 11:48:50,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 18823 states and 105946 transitions. [2021-06-30 11:48:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:50,325 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:50,325 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:50,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-06-30 11:48:50,325 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1667380955, now seen corresponding path program 8 times [2021-06-30 11:48:50,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:50,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200087944] [2021-06-30 11:48:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:50,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:50,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200087944] [2021-06-30 11:48:50,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200087944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:50,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290888186] [2021-06-30 11:48:50,373 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 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 [2021-06-30 11:48:50,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:50,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:50,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290888186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:50,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:50,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:50,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146966041] [2021-06-30 11:48:50,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:50,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:50,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:50,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:50,457 INFO L87 Difference]: Start difference. First operand 18823 states and 105946 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:50,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:50,708 INFO L93 Difference]: Finished difference Result 20040 states and 111635 transitions. [2021-06-30 11:48:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:50,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:50,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:50,787 INFO L225 Difference]: With dead ends: 20040 [2021-06-30 11:48:50,787 INFO L226 Difference]: Without dead ends: 20007 [2021-06-30 11:48:50,788 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20007 states. [2021-06-30 11:48:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20007 to 18907. [2021-06-30 11:48:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18907 states, 18906 states have (on average 5.627314080186184) internal successors, (106390), 18906 states have internal predecessors, (106390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18907 states to 18907 states and 106390 transitions. [2021-06-30 11:48:51,479 INFO L78 Accepts]: Start accepts. Automaton has 18907 states and 106390 transitions. Word has length 26 [2021-06-30 11:48:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:51,479 INFO L482 AbstractCegarLoop]: Abstraction has 18907 states and 106390 transitions. [2021-06-30 11:48:51,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 18907 states and 106390 transitions. [2021-06-30 11:48:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:51,540 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:51,540 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:51,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:51,741 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:51,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2129625819, now seen corresponding path program 9 times [2021-06-30 11:48:51,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:51,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505346925] [2021-06-30 11:48:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:51,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:51,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505346925] [2021-06-30 11:48:51,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505346925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:51,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394722359] [2021-06-30 11:48:51,786 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 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 [2021-06-30 11:48:51,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:48:51,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:51,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:51,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:51,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394722359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:51,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:51,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:51,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012611866] [2021-06-30 11:48:51,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:51,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:51,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:51,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:51,850 INFO L87 Difference]: Start difference. First operand 18907 states and 106390 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:52,315 INFO L93 Difference]: Finished difference Result 20285 states and 113124 transitions. [2021-06-30 11:48:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:52,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:52,406 INFO L225 Difference]: With dead ends: 20285 [2021-06-30 11:48:52,407 INFO L226 Difference]: Without dead ends: 20276 [2021-06-30 11:48:52,407 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20276 states. [2021-06-30 11:48:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20276 to 19219. [2021-06-30 11:48:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19219 states, 19218 states have (on average 5.634197106878967) internal successors, (108278), 19218 states have internal predecessors, (108278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19219 states to 19219 states and 108278 transitions. [2021-06-30 11:48:53,195 INFO L78 Accepts]: Start accepts. Automaton has 19219 states and 108278 transitions. Word has length 26 [2021-06-30 11:48:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:53,195 INFO L482 AbstractCegarLoop]: Abstraction has 19219 states and 108278 transitions. [2021-06-30 11:48:53,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 19219 states and 108278 transitions. [2021-06-30 11:48:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:53,251 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:53,251 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:53,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-06-30 11:48:53,452 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:53,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1608275163, now seen corresponding path program 10 times [2021-06-30 11:48:53,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:53,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037027281] [2021-06-30 11:48:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:53,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:53,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037027281] [2021-06-30 11:48:53,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037027281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:53,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121352022] [2021-06-30 11:48:53,510 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 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 [2021-06-30 11:48:53,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:53,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:53,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:53,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:53,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121352022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:53,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:53,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:53,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949401669] [2021-06-30 11:48:53,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:53,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:53,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:53,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:53,585 INFO L87 Difference]: Start difference. First operand 19219 states and 108278 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:53,852 INFO L93 Difference]: Finished difference Result 20648 states and 114958 transitions. [2021-06-30 11:48:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:53,932 INFO L225 Difference]: With dead ends: 20648 [2021-06-30 11:48:53,932 INFO L226 Difference]: Without dead ends: 20607 [2021-06-30 11:48:53,932 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20607 states. [2021-06-30 11:48:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20607 to 19011. [2021-06-30 11:48:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19011 states, 19010 states have (on average 5.6293529721199365) internal successors, (107014), 19010 states have internal predecessors, (107014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19011 states to 19011 states and 107014 transitions. [2021-06-30 11:48:54,635 INFO L78 Accepts]: Start accepts. Automaton has 19011 states and 107014 transitions. Word has length 26 [2021-06-30 11:48:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:54,635 INFO L482 AbstractCegarLoop]: Abstraction has 19011 states and 107014 transitions. [2021-06-30 11:48:54,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 19011 states and 107014 transitions. [2021-06-30 11:48:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:54,685 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:54,685 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:54,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:54,887 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1459087647, now seen corresponding path program 11 times [2021-06-30 11:48:54,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:54,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856520309] [2021-06-30 11:48:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:54,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:54,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856520309] [2021-06-30 11:48:54,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856520309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:54,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828406902] [2021-06-30 11:48:54,945 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 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 [2021-06-30 11:48:54,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:48:54,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:54,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:55,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828406902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:55,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:55,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:55,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793329153] [2021-06-30 11:48:55,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:55,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:55,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:55,012 INFO L87 Difference]: Start difference. First operand 19011 states and 107014 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:55,490 INFO L93 Difference]: Finished difference Result 20456 states and 113948 transitions. [2021-06-30 11:48:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:55,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:55,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:55,575 INFO L225 Difference]: With dead ends: 20456 [2021-06-30 11:48:55,575 INFO L226 Difference]: Without dead ends: 20432 [2021-06-30 11:48:55,575 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20432 states. [2021-06-30 11:48:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20432 to 19162. [2021-06-30 11:48:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19162 states, 19161 states have (on average 5.629768801210793) internal successors, (107872), 19161 states have internal predecessors, (107872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19162 states to 19162 states and 107872 transitions. [2021-06-30 11:48:56,391 INFO L78 Accepts]: Start accepts. Automaton has 19162 states and 107872 transitions. Word has length 26 [2021-06-30 11:48:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:56,391 INFO L482 AbstractCegarLoop]: Abstraction has 19162 states and 107872 transitions. [2021-06-30 11:48:56,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 19162 states and 107872 transitions. [2021-06-30 11:48:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:56,446 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:56,446 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:56,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:56,647 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash 301977435, now seen corresponding path program 12 times [2021-06-30 11:48:56,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:56,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045414861] [2021-06-30 11:48:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:56,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045414861] [2021-06-30 11:48:56,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045414861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815655831] [2021-06-30 11:48:56,692 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 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 [2021-06-30 11:48:56,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:48:56,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:56,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:56,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815655831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:56,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:56,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:56,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819196095] [2021-06-30 11:48:56,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:56,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:56,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:56,777 INFO L87 Difference]: Start difference. First operand 19162 states and 107872 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:57,043 INFO L93 Difference]: Finished difference Result 21013 states and 117034 transitions. [2021-06-30 11:48:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:57,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:57,126 INFO L225 Difference]: With dead ends: 21013 [2021-06-30 11:48:57,126 INFO L226 Difference]: Without dead ends: 20988 [2021-06-30 11:48:57,126 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:57,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20988 states. [2021-06-30 11:48:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20988 to 19724. [2021-06-30 11:48:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19724 states, 19723 states have (on average 5.6351974851695985) internal successors, (111143), 19723 states have internal predecessors, (111143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19724 states to 19724 states and 111143 transitions. [2021-06-30 11:48:57,861 INFO L78 Accepts]: Start accepts. Automaton has 19724 states and 111143 transitions. Word has length 26 [2021-06-30 11:48:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:57,861 INFO L482 AbstractCegarLoop]: Abstraction has 19724 states and 111143 transitions. [2021-06-30 11:48:57,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:57,861 INFO L276 IsEmpty]: Start isEmpty. Operand 19724 states and 111143 transitions. [2021-06-30 11:48:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:57,919 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:57,919 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:58,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:58,120 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:58,120 INFO L82 PathProgramCache]: Analyzing trace with hash 253829147, now seen corresponding path program 13 times [2021-06-30 11:48:58,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:58,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143089756] [2021-06-30 11:48:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:58,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:58,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143089756] [2021-06-30 11:48:58,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143089756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:58,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866814680] [2021-06-30 11:48:58,174 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 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 [2021-06-30 11:48:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:58,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:58,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:58,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866814680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:58,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:58,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:58,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780418369] [2021-06-30 11:48:58,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:58,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:58,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:58,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:58,239 INFO L87 Difference]: Start difference. First operand 19724 states and 111143 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:58,697 INFO L93 Difference]: Finished difference Result 21124 states and 117865 transitions. [2021-06-30 11:48:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:58,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:58,793 INFO L225 Difference]: With dead ends: 21124 [2021-06-30 11:48:58,793 INFO L226 Difference]: Without dead ends: 21091 [2021-06-30 11:48:58,793 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21091 states. [2021-06-30 11:48:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21091 to 20028. [2021-06-30 11:48:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20028 states, 20027 states have (on average 5.639436760373496) internal successors, (112941), 20027 states have internal predecessors, (112941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20028 states to 20028 states and 112941 transitions. [2021-06-30 11:48:59,590 INFO L78 Accepts]: Start accepts. Automaton has 20028 states and 112941 transitions. Word has length 26 [2021-06-30 11:48:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:59,590 INFO L482 AbstractCegarLoop]: Abstraction has 20028 states and 112941 transitions. [2021-06-30 11:48:59,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 20028 states and 112941 transitions. [2021-06-30 11:48:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:59,642 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:59,642 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:59,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:59,843 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:59,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:59,843 INFO L82 PathProgramCache]: Analyzing trace with hash -836103273, now seen corresponding path program 14 times [2021-06-30 11:48:59,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:59,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810482393] [2021-06-30 11:48:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:59,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:59,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810482393] [2021-06-30 11:48:59,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810482393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:59,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267427451] [2021-06-30 11:48:59,898 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 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 [2021-06-30 11:48:59,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:59,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:59,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:59,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267427451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:59,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:59,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:59,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033479831] [2021-06-30 11:48:59,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:59,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:59,974 INFO L87 Difference]: Start difference. First operand 20028 states and 112941 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:00,247 INFO L93 Difference]: Finished difference Result 21757 states and 121331 transitions. [2021-06-30 11:49:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:00,334 INFO L225 Difference]: With dead ends: 21757 [2021-06-30 11:49:00,334 INFO L226 Difference]: Without dead ends: 21724 [2021-06-30 11:49:00,334 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21724 states. [2021-06-30 11:49:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21724 to 20154. [2021-06-30 11:49:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20154 states, 20153 states have (on average 5.641244479730065) internal successors, (113688), 20153 states have internal predecessors, (113688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20154 states to 20154 states and 113688 transitions. [2021-06-30 11:49:01,081 INFO L78 Accepts]: Start accepts. Automaton has 20154 states and 113688 transitions. Word has length 26 [2021-06-30 11:49:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:01,081 INFO L482 AbstractCegarLoop]: Abstraction has 20154 states and 113688 transitions. [2021-06-30 11:49:01,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 20154 states and 113688 transitions. [2021-06-30 11:49:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:01,130 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:01,131 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:01,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-30 11:49:01,331 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1044396581, now seen corresponding path program 15 times [2021-06-30 11:49:01,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:01,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634952656] [2021-06-30 11:49:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:01,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634952656] [2021-06-30 11:49:01,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634952656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727670196] [2021-06-30 11:49:01,382 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 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 [2021-06-30 11:49:01,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:49:01,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:01,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:01,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727670196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:01,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:01,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:01,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565368161] [2021-06-30 11:49:01,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:01,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:01,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:01,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:01,468 INFO L87 Difference]: Start difference. First operand 20154 states and 113688 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:01,967 INFO L93 Difference]: Finished difference Result 22218 states and 124045 transitions. [2021-06-30 11:49:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:01,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:02,054 INFO L225 Difference]: With dead ends: 22218 [2021-06-30 11:49:02,054 INFO L226 Difference]: Without dead ends: 22203 [2021-06-30 11:49:02,054 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22203 states. [2021-06-30 11:49:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22203 to 20851. [2021-06-30 11:49:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20851 states, 20850 states have (on average 5.649928057553957) internal successors, (117801), 20850 states have internal predecessors, (117801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20851 states to 20851 states and 117801 transitions. [2021-06-30 11:49:02,784 INFO L78 Accepts]: Start accepts. Automaton has 20851 states and 117801 transitions. Word has length 26 [2021-06-30 11:49:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:02,784 INFO L482 AbstractCegarLoop]: Abstraction has 20851 states and 117801 transitions. [2021-06-30 11:49:02,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 20851 states and 117801 transitions. [2021-06-30 11:49:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:02,832 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:02,833 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:03,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:03,045 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2093460503, now seen corresponding path program 16 times [2021-06-30 11:49:03,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:03,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148668065] [2021-06-30 11:49:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:03,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:03,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148668065] [2021-06-30 11:49:03,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148668065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:03,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128804609] [2021-06-30 11:49:03,090 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 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 [2021-06-30 11:49:03,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:03,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128804609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:03,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:03,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:03,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385793306] [2021-06-30 11:49:03,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:03,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:03,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:03,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:03,158 INFO L87 Difference]: Start difference. First operand 20851 states and 117801 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:03,429 INFO L93 Difference]: Finished difference Result 22968 states and 128447 transitions. [2021-06-30 11:49:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:03,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:03,767 INFO L225 Difference]: With dead ends: 22968 [2021-06-30 11:49:03,768 INFO L226 Difference]: Without dead ends: 22919 [2021-06-30 11:49:03,768 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22919 states. [2021-06-30 11:49:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22919 to 21482. [2021-06-30 11:49:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21482 states, 21481 states have (on average 5.65904753037568) internal successors, (121562), 21481 states have internal predecessors, (121562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21482 states to 21482 states and 121562 transitions. [2021-06-30 11:49:04,572 INFO L78 Accepts]: Start accepts. Automaton has 21482 states and 121562 transitions. Word has length 26 [2021-06-30 11:49:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:04,573 INFO L482 AbstractCegarLoop]: Abstraction has 21482 states and 121562 transitions. [2021-06-30 11:49:04,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 21482 states and 121562 transitions. [2021-06-30 11:49:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:04,650 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:04,650 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:04,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-30 11:49:04,851 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:04,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1320550783, now seen corresponding path program 17 times [2021-06-30 11:49:04,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:04,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463082990] [2021-06-30 11:49:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:04,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:04,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463082990] [2021-06-30 11:49:04,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463082990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:04,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573248660] [2021-06-30 11:49:04,886 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 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 [2021-06-30 11:49:04,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:49:04,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:04,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:04,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573248660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:04,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:04,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:04,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483832428] [2021-06-30 11:49:04,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:04,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:04,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:04,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:04,948 INFO L87 Difference]: Start difference. First operand 21482 states and 121562 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:05,181 INFO L93 Difference]: Finished difference Result 23575 states and 131754 transitions. [2021-06-30 11:49:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:05,274 INFO L225 Difference]: With dead ends: 23575 [2021-06-30 11:49:05,274 INFO L226 Difference]: Without dead ends: 23512 [2021-06-30 11:49:05,274 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23512 states. [2021-06-30 11:49:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23512 to 22186. [2021-06-30 11:49:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22186 states, 22185 states have (on average 5.6576515663736755) internal successors, (125515), 22185 states have internal predecessors, (125515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22186 states to 22186 states and 125515 transitions. [2021-06-30 11:49:06,057 INFO L78 Accepts]: Start accepts. Automaton has 22186 states and 125515 transitions. Word has length 26 [2021-06-30 11:49:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:06,057 INFO L482 AbstractCegarLoop]: Abstraction has 22186 states and 125515 transitions. [2021-06-30 11:49:06,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 22186 states and 125515 transitions. [2021-06-30 11:49:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:06,115 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:06,115 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:06,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:06,315 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1138142085, now seen corresponding path program 18 times [2021-06-30 11:49:06,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:06,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655632312] [2021-06-30 11:49:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:06,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:06,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655632312] [2021-06-30 11:49:06,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655632312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:06,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225386626] [2021-06-30 11:49:06,367 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 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 [2021-06-30 11:49:06,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:49:06,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:06,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225386626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:06,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:06,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:06,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754179721] [2021-06-30 11:49:06,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:06,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:06,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:06,449 INFO L87 Difference]: Start difference. First operand 22186 states and 125515 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:07,052 INFO L93 Difference]: Finished difference Result 24436 states and 136564 transitions. [2021-06-30 11:49:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:07,163 INFO L225 Difference]: With dead ends: 24436 [2021-06-30 11:49:07,163 INFO L226 Difference]: Without dead ends: 24279 [2021-06-30 11:49:07,163 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24279 states. [2021-06-30 11:49:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24279 to 22195. [2021-06-30 11:49:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22195 states, 22194 states have (on average 5.666261151662612) internal successors, (125757), 22194 states have internal predecessors, (125757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22195 states to 22195 states and 125757 transitions. [2021-06-30 11:49:08,039 INFO L78 Accepts]: Start accepts. Automaton has 22195 states and 125757 transitions. Word has length 26 [2021-06-30 11:49:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:08,040 INFO L482 AbstractCegarLoop]: Abstraction has 22195 states and 125757 transitions. [2021-06-30 11:49:08,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 22195 states and 125757 transitions. [2021-06-30 11:49:08,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:08,096 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:08,096 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:08,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-30 11:49:08,297 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash -198997113, now seen corresponding path program 1 times [2021-06-30 11:49:08,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:08,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357787990] [2021-06-30 11:49:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:49:08,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:08,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357787990] [2021-06-30 11:49:08,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357787990] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:49:08,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:49:08,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:49:08,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860730420] [2021-06-30 11:49:08,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:49:08,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:49:08,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:49:08,326 INFO L87 Difference]: Start difference. First operand 22195 states and 125757 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:08,524 INFO L93 Difference]: Finished difference Result 23235 states and 130577 transitions. [2021-06-30 11:49:08,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:49:08,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:08,599 INFO L225 Difference]: With dead ends: 23235 [2021-06-30 11:49:08,599 INFO L226 Difference]: Without dead ends: 23210 [2021-06-30 11:49:08,599 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:49:08,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23210 states. [2021-06-30 11:49:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23210 to 22368. [2021-06-30 11:49:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22368 states, 22367 states have (on average 5.664729288684223) internal successors, (126703), 22367 states have internal predecessors, (126703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22368 states to 22368 states and 126703 transitions. [2021-06-30 11:49:09,492 INFO L78 Accepts]: Start accepts. Automaton has 22368 states and 126703 transitions. Word has length 26 [2021-06-30 11:49:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:09,492 INFO L482 AbstractCegarLoop]: Abstraction has 22368 states and 126703 transitions. [2021-06-30 11:49:09,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 22368 states and 126703 transitions. [2021-06-30 11:49:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:09,790 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:09,790 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:09,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-06-30 11:49:09,790 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:09,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1686954695, now seen corresponding path program 2 times [2021-06-30 11:49:09,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:09,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437371229] [2021-06-30 11:49:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:49:09,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:09,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437371229] [2021-06-30 11:49:09,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437371229] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:49:09,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:49:09,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:49:09,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657898107] [2021-06-30 11:49:09,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:49:09,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:49:09,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:49:09,841 INFO L87 Difference]: Start difference. First operand 22368 states and 126703 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:10,124 INFO L93 Difference]: Finished difference Result 23262 states and 130861 transitions. [2021-06-30 11:49:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:49:10,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:10,240 INFO L225 Difference]: With dead ends: 23262 [2021-06-30 11:49:10,240 INFO L226 Difference]: Without dead ends: 23253 [2021-06-30 11:49:10,241 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:49:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23253 states. [2021-06-30 11:49:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23253 to 22492. [2021-06-30 11:49:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22492 states, 22491 states have (on average 5.6643990929705215) internal successors, (127398), 22491 states have internal predecessors, (127398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22492 states to 22492 states and 127398 transitions. [2021-06-30 11:49:10,949 INFO L78 Accepts]: Start accepts. Automaton has 22492 states and 127398 transitions. Word has length 26 [2021-06-30 11:49:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:10,949 INFO L482 AbstractCegarLoop]: Abstraction has 22492 states and 127398 transitions. [2021-06-30 11:49:10,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 22492 states and 127398 transitions. [2021-06-30 11:49:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:11,008 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:11,008 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:11,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-06-30 11:49:11,008 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1951246837, now seen corresponding path program 3 times [2021-06-30 11:49:11,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:11,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595970186] [2021-06-30 11:49:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:11,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595970186] [2021-06-30 11:49:11,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595970186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538786614] [2021-06-30 11:49:11,048 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 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 [2021-06-30 11:49:11,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:49:11,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:11,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:11,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538786614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:11,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:11,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:11,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739807510] [2021-06-30 11:49:11,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:11,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:11,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:11,125 INFO L87 Difference]: Start difference. First operand 22492 states and 127398 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:11,598 INFO L93 Difference]: Finished difference Result 23665 states and 132706 transitions. [2021-06-30 11:49:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:11,695 INFO L225 Difference]: With dead ends: 23665 [2021-06-30 11:49:11,695 INFO L226 Difference]: Without dead ends: 23610 [2021-06-30 11:49:11,695 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23610 states. [2021-06-30 11:49:12,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23610 to 22355. [2021-06-30 11:49:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22355 states, 22354 states have (on average 5.665071128209717) internal successors, (126637), 22354 states have internal predecessors, (126637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22355 states to 22355 states and 126637 transitions. [2021-06-30 11:49:12,532 INFO L78 Accepts]: Start accepts. Automaton has 22355 states and 126637 transitions. Word has length 26 [2021-06-30 11:49:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:12,533 INFO L482 AbstractCegarLoop]: Abstraction has 22355 states and 126637 transitions. [2021-06-30 11:49:12,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 22355 states and 126637 transitions. [2021-06-30 11:49:12,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:12,588 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:12,588 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:12,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-30 11:49:12,789 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:12,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2018207029, now seen corresponding path program 4 times [2021-06-30 11:49:12,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:12,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755417011] [2021-06-30 11:49:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:12,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755417011] [2021-06-30 11:49:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755417011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895837652] [2021-06-30 11:49:12,826 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 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 [2021-06-30 11:49:12,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:12,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:12,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:12,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895837652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:12,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:12,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:12,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135201729] [2021-06-30 11:49:12,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:12,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:12,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:12,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:12,885 INFO L87 Difference]: Start difference. First operand 22355 states and 126637 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:13,124 INFO L93 Difference]: Finished difference Result 23821 states and 133573 transitions. [2021-06-30 11:49:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:13,220 INFO L225 Difference]: With dead ends: 23821 [2021-06-30 11:49:13,220 INFO L226 Difference]: Without dead ends: 23749 [2021-06-30 11:49:13,221 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23749 states. [2021-06-30 11:49:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23749 to 22691. [2021-06-30 11:49:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22691 states, 22690 states have (on average 5.664786249449096) internal successors, (128534), 22690 states have internal predecessors, (128534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22691 states to 22691 states and 128534 transitions. [2021-06-30 11:49:14,037 INFO L78 Accepts]: Start accepts. Automaton has 22691 states and 128534 transitions. Word has length 26 [2021-06-30 11:49:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:14,037 INFO L482 AbstractCegarLoop]: Abstraction has 22691 states and 128534 transitions. [2021-06-30 11:49:14,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 22691 states and 128534 transitions. [2021-06-30 11:49:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:14,091 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:14,091 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:14,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:14,291 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:14,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1192560903, now seen corresponding path program 5 times [2021-06-30 11:49:14,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:14,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279051212] [2021-06-30 11:49:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:14,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:14,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279051212] [2021-06-30 11:49:14,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279051212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:14,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916839129] [2021-06-30 11:49:14,328 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 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 [2021-06-30 11:49:14,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:14,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:14,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:14,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916839129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:14,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:14,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:14,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968663539] [2021-06-30 11:49:14,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:14,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:14,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:14,605 INFO L87 Difference]: Start difference. First operand 22691 states and 128534 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:14,847 INFO L93 Difference]: Finished difference Result 23841 states and 133959 transitions. [2021-06-30 11:49:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:14,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:14,930 INFO L225 Difference]: With dead ends: 23841 [2021-06-30 11:49:14,930 INFO L226 Difference]: Without dead ends: 23804 [2021-06-30 11:49:14,930 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23804 states. [2021-06-30 11:49:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23804 to 23047. [2021-06-30 11:49:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23047 states, 23046 states have (on average 5.657380890393127) internal successors, (130380), 23046 states have internal predecessors, (130380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23047 states to 23047 states and 130380 transitions. [2021-06-30 11:49:15,628 INFO L78 Accepts]: Start accepts. Automaton has 23047 states and 130380 transitions. Word has length 26 [2021-06-30 11:49:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:15,628 INFO L482 AbstractCegarLoop]: Abstraction has 23047 states and 130380 transitions. [2021-06-30 11:49:15,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 23047 states and 130380 transitions. [2021-06-30 11:49:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:15,681 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:15,681 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:15,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-30 11:49:15,882 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:15,888 INFO L82 PathProgramCache]: Analyzing trace with hash -262294649, now seen corresponding path program 6 times [2021-06-30 11:49:15,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:15,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745587412] [2021-06-30 11:49:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:15,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:15,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745587412] [2021-06-30 11:49:15,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745587412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:15,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117090966] [2021-06-30 11:49:15,930 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 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 [2021-06-30 11:49:15,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:49:15,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:15,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:15,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:15,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117090966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:15,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:15,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:15,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507911196] [2021-06-30 11:49:15,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:15,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:15,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:15,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:15,989 INFO L87 Difference]: Start difference. First operand 23047 states and 130380 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:16,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:16,473 INFO L93 Difference]: Finished difference Result 24225 states and 135783 transitions. [2021-06-30 11:49:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:16,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:16,563 INFO L225 Difference]: With dead ends: 24225 [2021-06-30 11:49:16,563 INFO L226 Difference]: Without dead ends: 24046 [2021-06-30 11:49:16,563 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24046 states. [2021-06-30 11:49:17,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24046 to 22377. [2021-06-30 11:49:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22377 states, 22376 states have (on average 5.665042903110476) internal successors, (126761), 22376 states have internal predecessors, (126761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22377 states to 22377 states and 126761 transitions. [2021-06-30 11:49:17,334 INFO L78 Accepts]: Start accepts. Automaton has 22377 states and 126761 transitions. Word has length 26 [2021-06-30 11:49:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:17,334 INFO L482 AbstractCegarLoop]: Abstraction has 22377 states and 126761 transitions. [2021-06-30 11:49:17,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 22377 states and 126761 transitions. [2021-06-30 11:49:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:17,386 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:17,387 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:17,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-30 11:49:17,587 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:17,588 INFO L82 PathProgramCache]: Analyzing trace with hash -250656313, now seen corresponding path program 7 times [2021-06-30 11:49:17,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:17,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755586486] [2021-06-30 11:49:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:49:17,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:17,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755586486] [2021-06-30 11:49:17,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755586486] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:49:17,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:49:17,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:49:17,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613326570] [2021-06-30 11:49:17,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:49:17,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:49:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:49:17,616 INFO L87 Difference]: Start difference. First operand 22377 states and 126761 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:17,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:17,836 INFO L93 Difference]: Finished difference Result 23092 states and 130134 transitions. [2021-06-30 11:49:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:49:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:17,925 INFO L225 Difference]: With dead ends: 23092 [2021-06-30 11:49:17,925 INFO L226 Difference]: Without dead ends: 23083 [2021-06-30 11:49:17,926 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:49:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23083 states. [2021-06-30 11:49:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23083 to 22480. [2021-06-30 11:49:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22480 states, 22479 states have (on average 5.664842742114863) internal successors, (127340), 22479 states have internal predecessors, (127340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22480 states to 22480 states and 127340 transitions. [2021-06-30 11:49:18,731 INFO L78 Accepts]: Start accepts. Automaton has 22480 states and 127340 transitions. Word has length 26 [2021-06-30 11:49:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:18,731 INFO L482 AbstractCegarLoop]: Abstraction has 22480 states and 127340 transitions. [2021-06-30 11:49:18,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 22480 states and 127340 transitions. [2021-06-30 11:49:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:18,784 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:18,785 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:18,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-06-30 11:49:18,785 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1259169013, now seen corresponding path program 8 times [2021-06-30 11:49:18,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:18,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116812350] [2021-06-30 11:49:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:18,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116812350] [2021-06-30 11:49:18,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116812350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888036885] [2021-06-30 11:49:18,848 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 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 [2021-06-30 11:49:18,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:18,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:18,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:18,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:19,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888036885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:19,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:19,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:19,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789917275] [2021-06-30 11:49:19,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:19,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:19,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:19,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:19,163 INFO L87 Difference]: Start difference. First operand 22480 states and 127340 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:19,416 INFO L93 Difference]: Finished difference Result 23450 states and 131850 transitions. [2021-06-30 11:49:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:19,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:19,501 INFO L225 Difference]: With dead ends: 23450 [2021-06-30 11:49:19,502 INFO L226 Difference]: Without dead ends: 23405 [2021-06-30 11:49:19,502 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23405 states. [2021-06-30 11:49:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23405 to 22539. [2021-06-30 11:49:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22539 states, 22538 states have (on average 5.663368533144023) internal successors, (127641), 22538 states have internal predecessors, (127641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22539 states to 22539 states and 127641 transitions. [2021-06-30 11:49:20,362 INFO L78 Accepts]: Start accepts. Automaton has 22539 states and 127641 transitions. Word has length 26 [2021-06-30 11:49:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:20,362 INFO L482 AbstractCegarLoop]: Abstraction has 22539 states and 127641 transitions. [2021-06-30 11:49:20,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22539 states and 127641 transitions. [2021-06-30 11:49:20,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:20,442 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:20,442 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:20,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:20,661 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:20,661 INFO L82 PathProgramCache]: Analyzing trace with hash -846762229, now seen corresponding path program 9 times [2021-06-30 11:49:20,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:20,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516754059] [2021-06-30 11:49:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:20,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:20,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516754059] [2021-06-30 11:49:20,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516754059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:20,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946252046] [2021-06-30 11:49:20,697 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 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 [2021-06-30 11:49:20,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:49:20,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:20,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:20,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946252046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:20,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:20,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:20,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906395842] [2021-06-30 11:49:20,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:20,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:20,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:20,766 INFO L87 Difference]: Start difference. First operand 22539 states and 127641 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:21,296 INFO L93 Difference]: Finished difference Result 23649 states and 133006 transitions. [2021-06-30 11:49:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:21,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:21,408 INFO L225 Difference]: With dead ends: 23649 [2021-06-30 11:49:21,408 INFO L226 Difference]: Without dead ends: 23640 [2021-06-30 11:49:21,408 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23640 states. [2021-06-30 11:49:21,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23640 to 22747. [2021-06-30 11:49:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22747 states, 22746 states have (on average 5.666446847797415) internal successors, (128889), 22746 states have internal predecessors, (128889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22747 states to 22747 states and 128889 transitions. [2021-06-30 11:49:22,263 INFO L78 Accepts]: Start accepts. Automaton has 22747 states and 128889 transitions. Word has length 26 [2021-06-30 11:49:22,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:22,264 INFO L482 AbstractCegarLoop]: Abstraction has 22747 states and 128889 transitions. [2021-06-30 11:49:22,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 22747 states and 128889 transitions. [2021-06-30 11:49:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:22,325 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:22,325 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:22,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:22,537 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1200063221, now seen corresponding path program 10 times [2021-06-30 11:49:22,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:22,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421054777] [2021-06-30 11:49:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:22,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:22,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421054777] [2021-06-30 11:49:22,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421054777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:22,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184165438] [2021-06-30 11:49:22,583 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 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 [2021-06-30 11:49:22,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:22,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:22,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:22,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184165438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:22,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:22,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:22,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63089251] [2021-06-30 11:49:22,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:22,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:22,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:22,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:22,660 INFO L87 Difference]: Start difference. First operand 22747 states and 128889 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:22,938 INFO L93 Difference]: Finished difference Result 23957 states and 134468 transitions. [2021-06-30 11:49:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:22,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:23,028 INFO L225 Difference]: With dead ends: 23957 [2021-06-30 11:49:23,028 INFO L226 Difference]: Without dead ends: 23916 [2021-06-30 11:49:23,028 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23916 states. [2021-06-30 11:49:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23916 to 22610. [2021-06-30 11:49:23,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22610 states, 22609 states have (on average 5.664381441019064) internal successors, (128066), 22609 states have internal predecessors, (128066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22610 states to 22610 states and 128066 transitions. [2021-06-30 11:49:23,817 INFO L78 Accepts]: Start accepts. Automaton has 22610 states and 128066 transitions. Word has length 26 [2021-06-30 11:49:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:23,817 INFO L482 AbstractCegarLoop]: Abstraction has 22610 states and 128066 transitions. [2021-06-30 11:49:23,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 22610 states and 128066 transitions. [2021-06-30 11:49:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:23,869 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:23,870 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:24,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:24,070 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:24,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1467462321, now seen corresponding path program 11 times [2021-06-30 11:49:24,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:24,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459287169] [2021-06-30 11:49:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:24,317 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-30 11:49:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:24,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:24,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459287169] [2021-06-30 11:49:24,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459287169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:24,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429438317] [2021-06-30 11:49:24,321 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:24,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:49:24,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:24,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:24,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429438317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:24,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:24,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:24,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320581899] [2021-06-30 11:49:24,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:24,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:24,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:24,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:24,453 INFO L87 Difference]: Start difference. First operand 22610 states and 128066 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:24,735 INFO L93 Difference]: Finished difference Result 23755 states and 133514 transitions. [2021-06-30 11:49:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:24,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:24,826 INFO L225 Difference]: With dead ends: 23755 [2021-06-30 11:49:24,826 INFO L226 Difference]: Without dead ends: 23722 [2021-06-30 11:49:24,826 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23722 states. [2021-06-30 11:49:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23722 to 22745. [2021-06-30 11:49:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22745 states, 22744 states have (on average 5.662504396763982) internal successors, (128788), 22744 states have internal predecessors, (128788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22745 states to 22745 states and 128788 transitions. [2021-06-30 11:49:25,566 INFO L78 Accepts]: Start accepts. Automaton has 22745 states and 128788 transitions. Word has length 26 [2021-06-30 11:49:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:25,566 INFO L482 AbstractCegarLoop]: Abstraction has 22745 states and 128788 transitions. [2021-06-30 11:49:25,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 22745 states and 128788 transitions. [2021-06-30 11:49:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:25,622 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:25,622 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:25,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-30 11:49:25,823 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:25,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:25,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1838444427, now seen corresponding path program 12 times [2021-06-30 11:49:25,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:25,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751596481] [2021-06-30 11:49:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:25,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:25,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751596481] [2021-06-30 11:49:25,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751596481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:25,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104624782] [2021-06-30 11:49:25,875 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 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 [2021-06-30 11:49:25,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:49:25,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:25,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:25,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104624782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:25,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:25,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:25,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998525704] [2021-06-30 11:49:25,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:25,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:25,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:25,953 INFO L87 Difference]: Start difference. First operand 22745 states and 128788 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:26,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:26,435 INFO L93 Difference]: Finished difference Result 24196 states and 135869 transitions. [2021-06-30 11:49:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:26,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:26,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:26,527 INFO L225 Difference]: With dead ends: 24196 [2021-06-30 11:49:26,527 INFO L226 Difference]: Without dead ends: 24171 [2021-06-30 11:49:26,527 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24171 states. [2021-06-30 11:49:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24171 to 23163. [2021-06-30 11:49:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23163 states, 23162 states have (on average 5.662334858820482) internal successors, (131151), 23162 states have internal predecessors, (131151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23163 states to 23163 states and 131151 transitions. [2021-06-30 11:49:27,384 INFO L78 Accepts]: Start accepts. Automaton has 23163 states and 131151 transitions. Word has length 26 [2021-06-30 11:49:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:27,384 INFO L482 AbstractCegarLoop]: Abstraction has 23163 states and 131151 transitions. [2021-06-30 11:49:27,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 23163 states and 131151 transitions. [2021-06-30 11:49:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:27,444 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:27,444 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:27,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-30 11:49:27,645 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:27,645 INFO L82 PathProgramCache]: Analyzing trace with hash 289803339, now seen corresponding path program 13 times [2021-06-30 11:49:27,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:27,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325769734] [2021-06-30 11:49:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:27,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:27,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325769734] [2021-06-30 11:49:27,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325769734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:27,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962518079] [2021-06-30 11:49:27,694 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 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 [2021-06-30 11:49:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:27,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962518079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:27,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:27,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:27,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554554573] [2021-06-30 11:49:27,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:27,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:27,760 INFO L87 Difference]: Start difference. First operand 23163 states and 131151 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:28,012 INFO L93 Difference]: Finished difference Result 24332 states and 136687 transitions. [2021-06-30 11:49:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:28,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:28,103 INFO L225 Difference]: With dead ends: 24332 [2021-06-30 11:49:28,103 INFO L226 Difference]: Without dead ends: 24283 [2021-06-30 11:49:28,103 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24283 states. [2021-06-30 11:49:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24283 to 23362. [2021-06-30 11:49:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23362 states, 23361 states have (on average 5.663927057917041) internal successors, (132315), 23361 states have internal predecessors, (132315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23362 states to 23362 states and 132315 transitions. [2021-06-30 11:49:29,186 INFO L78 Accepts]: Start accepts. Automaton has 23362 states and 132315 transitions. Word has length 26 [2021-06-30 11:49:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:29,186 INFO L482 AbstractCegarLoop]: Abstraction has 23362 states and 132315 transitions. [2021-06-30 11:49:29,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 23362 states and 132315 transitions. [2021-06-30 11:49:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:29,263 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:29,263 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:29,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-30 11:49:29,464 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:29,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1781808071, now seen corresponding path program 14 times [2021-06-30 11:49:29,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:29,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370312747] [2021-06-30 11:49:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:29,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:29,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370312747] [2021-06-30 11:49:29,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370312747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:29,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488369078] [2021-06-30 11:49:29,516 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 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 [2021-06-30 11:49:29,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:29,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488369078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:29,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:29,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:29,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069208749] [2021-06-30 11:49:29,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:29,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:29,580 INFO L87 Difference]: Start difference. First operand 23362 states and 132315 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:29,872 INFO L93 Difference]: Finished difference Result 24814 states and 139246 transitions. [2021-06-30 11:49:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:29,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:29,973 INFO L225 Difference]: With dead ends: 24814 [2021-06-30 11:49:29,974 INFO L226 Difference]: Without dead ends: 24769 [2021-06-30 11:49:29,974 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:30,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24769 states. [2021-06-30 11:49:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24769 to 23446. [2021-06-30 11:49:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23446 states, 23445 states have (on average 5.664747280870121) internal successors, (132810), 23445 states have internal predecessors, (132810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23446 states to 23446 states and 132810 transitions. [2021-06-30 11:49:30,770 INFO L78 Accepts]: Start accepts. Automaton has 23446 states and 132810 transitions. Word has length 26 [2021-06-30 11:49:30,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:30,770 INFO L482 AbstractCegarLoop]: Abstraction has 23446 states and 132810 transitions. [2021-06-30 11:49:30,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:30,770 INFO L276 IsEmpty]: Start isEmpty. Operand 23446 states and 132810 transitions. [2021-06-30 11:49:30,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:30,825 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:30,825 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:31,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-30 11:49:31,026 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1573514763, now seen corresponding path program 15 times [2021-06-30 11:49:31,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:31,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168064617] [2021-06-30 11:49:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:31,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:31,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168064617] [2021-06-30 11:49:31,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168064617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:31,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524399810] [2021-06-30 11:49:31,071 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:31,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:49:31,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:31,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:31,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524399810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:31,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:31,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:31,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334474411] [2021-06-30 11:49:31,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:31,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:31,133 INFO L87 Difference]: Start difference. First operand 23446 states and 132810 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:31,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:31,643 INFO L93 Difference]: Finished difference Result 25084 states and 140892 transitions. [2021-06-30 11:49:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:31,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:31,752 INFO L225 Difference]: With dead ends: 25084 [2021-06-30 11:49:31,753 INFO L226 Difference]: Without dead ends: 25060 [2021-06-30 11:49:31,753 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25060 states. [2021-06-30 11:49:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25060 to 23926. [2021-06-30 11:49:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23926 states, 23925 states have (on average 5.667335423197492) internal successors, (135591), 23925 states have internal predecessors, (135591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23926 states to 23926 states and 135591 transitions. [2021-06-30 11:49:32,536 INFO L78 Accepts]: Start accepts. Automaton has 23926 states and 135591 transitions. Word has length 26 [2021-06-30 11:49:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:32,536 INFO L482 AbstractCegarLoop]: Abstraction has 23926 states and 135591 transitions. [2021-06-30 11:49:32,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 23926 states and 135591 transitions. [2021-06-30 11:49:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:32,595 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:32,595 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:32,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-30 11:49:32,795 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash 584454215, now seen corresponding path program 16 times [2021-06-30 11:49:32,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:32,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605802212] [2021-06-30 11:49:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:32,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:32,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605802212] [2021-06-30 11:49:32,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605802212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:32,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919911972] [2021-06-30 11:49:32,847 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 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 [2021-06-30 11:49:32,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:32,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:32,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:32,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:32,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919911972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:32,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:32,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20379476] [2021-06-30 11:49:32,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:32,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:32,921 INFO L87 Difference]: Start difference. First operand 23926 states and 135591 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:33,585 INFO L93 Difference]: Finished difference Result 25605 states and 143821 transitions. [2021-06-30 11:49:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:33,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:33,700 INFO L225 Difference]: With dead ends: 25605 [2021-06-30 11:49:33,700 INFO L226 Difference]: Without dead ends: 25556 [2021-06-30 11:49:33,700 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25556 states. [2021-06-30 11:49:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25556 to 24344. [2021-06-30 11:49:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24344 states, 24343 states have (on average 5.669925645976256) internal successors, (138023), 24343 states have internal predecessors, (138023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24344 states to 24344 states and 138023 transitions. [2021-06-30 11:49:34,596 INFO L78 Accepts]: Start accepts. Automaton has 24344 states and 138023 transitions. Word has length 26 [2021-06-30 11:49:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:34,596 INFO L482 AbstractCegarLoop]: Abstraction has 24344 states and 138023 transitions. [2021-06-30 11:49:34,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 24344 states and 138023 transitions. [2021-06-30 11:49:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:34,661 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:34,661 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:34,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-30 11:49:34,861 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:34,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:34,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1447374703, now seen corresponding path program 17 times [2021-06-30 11:49:34,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:34,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685745911] [2021-06-30 11:49:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:34,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:34,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685745911] [2021-06-30 11:49:34,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685745911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:34,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97723039] [2021-06-30 11:49:34,903 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 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 [2021-06-30 11:49:34,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:49:34,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:34,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:34,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:34,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97723039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:34,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:34,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:34,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889282641] [2021-06-30 11:49:34,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:34,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:34,963 INFO L87 Difference]: Start difference. First operand 24344 states and 138023 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:35,261 INFO L93 Difference]: Finished difference Result 25987 states and 145839 transitions. [2021-06-30 11:49:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:35,652 INFO L225 Difference]: With dead ends: 25987 [2021-06-30 11:49:35,652 INFO L226 Difference]: Without dead ends: 25911 [2021-06-30 11:49:35,652 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25911 states. [2021-06-30 11:49:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25911 to 24872. [2021-06-30 11:49:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24872 states, 24871 states have (on average 5.661613927867798) internal successors, (140810), 24871 states have internal predecessors, (140810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24872 states to 24872 states and 140810 transitions. [2021-06-30 11:49:36,564 INFO L78 Accepts]: Start accepts. Automaton has 24872 states and 140810 transitions. Word has length 26 [2021-06-30 11:49:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:36,564 INFO L482 AbstractCegarLoop]: Abstraction has 24872 states and 140810 transitions. [2021-06-30 11:49:36,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 24872 states and 140810 transitions. [2021-06-30 11:49:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:36,634 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:36,634 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:36,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:36,835 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:36,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1925890453, now seen corresponding path program 18 times [2021-06-30 11:49:36,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:36,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651815659] [2021-06-30 11:49:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:36,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:36,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651815659] [2021-06-30 11:49:36,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651815659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:36,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328165906] [2021-06-30 11:49:36,879 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 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 [2021-06-30 11:49:36,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:49:36,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:36,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:36,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328165906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:36,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:36,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:36,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138444474] [2021-06-30 11:49:36,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:36,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:36,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:36,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:36,944 INFO L87 Difference]: Start difference. First operand 24872 states and 140810 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:37,272 INFO L93 Difference]: Finished difference Result 26679 states and 149527 transitions. [2021-06-30 11:49:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:37,387 INFO L225 Difference]: With dead ends: 26679 [2021-06-30 11:49:37,387 INFO L226 Difference]: Without dead ends: 26411 [2021-06-30 11:49:37,387 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26411 states. [2021-06-30 11:49:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26411 to 24755. [2021-06-30 11:49:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24755 states, 24754 states have (on average 5.672780156742345) internal successors, (140424), 24754 states have internal predecessors, (140424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24755 states to 24755 states and 140424 transitions. [2021-06-30 11:49:38,585 INFO L78 Accepts]: Start accepts. Automaton has 24755 states and 140424 transitions. Word has length 26 [2021-06-30 11:49:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:38,586 INFO L482 AbstractCegarLoop]: Abstraction has 24755 states and 140424 transitions. [2021-06-30 11:49:38,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24755 states and 140424 transitions. [2021-06-30 11:49:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:38,679 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:38,679 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:38,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:38,880 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:38,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash -303594323, now seen corresponding path program 14 times [2021-06-30 11:49:38,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:38,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013068141] [2021-06-30 11:49:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:38,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:38,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013068141] [2021-06-30 11:49:38,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013068141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:38,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191629791] [2021-06-30 11:49:38,934 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 [2021-06-30 11:49:38,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:38,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:39,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191629791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:39,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:39,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:39,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396813890] [2021-06-30 11:49:39,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:39,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:39,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:39,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:39,009 INFO L87 Difference]: Start difference. First operand 24755 states and 140424 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:39,335 INFO L93 Difference]: Finished difference Result 28487 states and 159754 transitions. [2021-06-30 11:49:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:39,449 INFO L225 Difference]: With dead ends: 28487 [2021-06-30 11:49:39,449 INFO L226 Difference]: Without dead ends: 28415 [2021-06-30 11:49:39,449 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:39,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28415 states. [2021-06-30 11:49:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28415 to 26503. [2021-06-30 11:49:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26503 states, 26502 states have (on average 5.679307222096446) internal successors, (150513), 26502 states have internal predecessors, (150513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26503 states to 26503 states and 150513 transitions. [2021-06-30 11:49:40,419 INFO L78 Accepts]: Start accepts. Automaton has 26503 states and 150513 transitions. Word has length 26 [2021-06-30 11:49:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:40,419 INFO L482 AbstractCegarLoop]: Abstraction has 26503 states and 150513 transitions. [2021-06-30 11:49:40,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 26503 states and 150513 transitions. [2021-06-30 11:49:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:40,708 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:40,708 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:40,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:40,909 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:40,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1656941737, now seen corresponding path program 15 times [2021-06-30 11:49:40,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:40,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479266094] [2021-06-30 11:49:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:40,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:40,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479266094] [2021-06-30 11:49:40,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479266094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:40,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618965253] [2021-06-30 11:49:40,957 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 [2021-06-30 11:49:40,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:49:40,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:40,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:40,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:41,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618965253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:41,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:41,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:41,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690692201] [2021-06-30 11:49:41,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:41,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:41,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:41,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:41,017 INFO L87 Difference]: Start difference. First operand 26503 states and 150513 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:41,365 INFO L93 Difference]: Finished difference Result 29432 states and 165416 transitions. [2021-06-30 11:49:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:41,503 INFO L225 Difference]: With dead ends: 29432 [2021-06-30 11:49:41,504 INFO L226 Difference]: Without dead ends: 29343 [2021-06-30 11:49:41,504 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29343 states. [2021-06-30 11:49:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29343 to 27837. [2021-06-30 11:49:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27837 states, 27836 states have (on average 5.6836111510274465) internal successors, (158209), 27836 states have internal predecessors, (158209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27837 states to 27837 states and 158209 transitions. [2021-06-30 11:49:42,740 INFO L78 Accepts]: Start accepts. Automaton has 27837 states and 158209 transitions. Word has length 26 [2021-06-30 11:49:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:42,740 INFO L482 AbstractCegarLoop]: Abstraction has 27837 states and 158209 transitions. [2021-06-30 11:49:42,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 27837 states and 158209 transitions. [2021-06-30 11:49:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:42,841 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:42,841 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:43,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-30 11:49:43,042 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:43,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1152216795, now seen corresponding path program 16 times [2021-06-30 11:49:43,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:43,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158077293] [2021-06-30 11:49:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:43,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158077293] [2021-06-30 11:49:43,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158077293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527039468] [2021-06-30 11:49:43,085 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 [2021-06-30 11:49:43,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:43,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:43,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:43,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527039468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:43,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:43,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:43,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346676859] [2021-06-30 11:49:43,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:43,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:43,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:43,145 INFO L87 Difference]: Start difference. First operand 27837 states and 158209 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:43,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:43,505 INFO L93 Difference]: Finished difference Result 31155 states and 174952 transitions. [2021-06-30 11:49:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:43,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:43,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:43,639 INFO L225 Difference]: With dead ends: 31155 [2021-06-30 11:49:43,640 INFO L226 Difference]: Without dead ends: 31129 [2021-06-30 11:49:43,640 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31129 states. [2021-06-30 11:49:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31129 to 28974. [2021-06-30 11:49:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28974 states, 28973 states have (on average 5.68532771891071) internal successors, (164721), 28973 states have internal predecessors, (164721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28974 states to 28974 states and 164721 transitions. [2021-06-30 11:49:44,901 INFO L78 Accepts]: Start accepts. Automaton has 28974 states and 164721 transitions. Word has length 26 [2021-06-30 11:49:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:44,901 INFO L482 AbstractCegarLoop]: Abstraction has 28974 states and 164721 transitions. [2021-06-30 11:49:44,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 28974 states and 164721 transitions. [2021-06-30 11:49:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:44,978 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:44,978 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:45,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:45,180 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1632072297, now seen corresponding path program 17 times [2021-06-30 11:49:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:45,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771727839] [2021-06-30 11:49:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:45,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:45,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771727839] [2021-06-30 11:49:45,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771727839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:45,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696963349] [2021-06-30 11:49:45,224 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 [2021-06-30 11:49:45,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-30 11:49:45,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:45,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:45,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696963349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:45,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:45,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:45,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227263138] [2021-06-30 11:49:45,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:45,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:45,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:45,289 INFO L87 Difference]: Start difference. First operand 28974 states and 164721 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:45,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:45,617 INFO L93 Difference]: Finished difference Result 32183 states and 180764 transitions. [2021-06-30 11:49:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:45,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:45,989 INFO L225 Difference]: With dead ends: 32183 [2021-06-30 11:49:45,989 INFO L226 Difference]: Without dead ends: 32083 [2021-06-30 11:49:45,989 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32083 states. [2021-06-30 11:49:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32083 to 29825. [2021-06-30 11:49:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29825 states, 29824 states have (on average 5.691724785407725) internal successors, (169750), 29824 states have internal predecessors, (169750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29825 states to 29825 states and 169750 transitions. [2021-06-30 11:49:46,935 INFO L78 Accepts]: Start accepts. Automaton has 29825 states and 169750 transitions. Word has length 26 [2021-06-30 11:49:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:46,935 INFO L482 AbstractCegarLoop]: Abstraction has 29825 states and 169750 transitions. [2021-06-30 11:49:46,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 29825 states and 169750 transitions. [2021-06-30 11:49:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:47,010 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:47,010 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:47,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-30 11:49:47,211 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1233458813, now seen corresponding path program 14 times [2021-06-30 11:49:47,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:47,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734678628] [2021-06-30 11:49:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:47,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:47,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734678628] [2021-06-30 11:49:47,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734678628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:47,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327756900] [2021-06-30 11:49:47,254 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 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 [2021-06-30 11:49:47,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:47,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:47,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:47,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:47,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327756900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:47,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:47,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:47,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244982306] [2021-06-30 11:49:47,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:47,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:47,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:47,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:47,326 INFO L87 Difference]: Start difference. First operand 29825 states and 169750 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:47,919 INFO L93 Difference]: Finished difference Result 32392 states and 182875 transitions. [2021-06-30 11:49:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:47,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:48,058 INFO L225 Difference]: With dead ends: 32392 [2021-06-30 11:49:48,058 INFO L226 Difference]: Without dead ends: 32285 [2021-06-30 11:49:48,058 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32285 states. [2021-06-30 11:49:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32285 to 30815. [2021-06-30 11:49:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30815 states, 30814 states have (on average 5.694100084377231) internal successors, (175458), 30814 states have internal predecessors, (175458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30815 states to 30815 states and 175458 transitions. [2021-06-30 11:49:49,062 INFO L78 Accepts]: Start accepts. Automaton has 30815 states and 175458 transitions. Word has length 26 [2021-06-30 11:49:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:49,062 INFO L482 AbstractCegarLoop]: Abstraction has 30815 states and 175458 transitions. [2021-06-30 11:49:49,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 30815 states and 175458 transitions. [2021-06-30 11:49:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:49,139 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:49,139 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:49,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-30 11:49:49,340 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash -288419687, now seen corresponding path program 15 times [2021-06-30 11:49:49,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:49,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513021405] [2021-06-30 11:49:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:49,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:49,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513021405] [2021-06-30 11:49:49,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513021405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:49,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209434058] [2021-06-30 11:49:49,383 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 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 [2021-06-30 11:49:49,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:49:49,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:49,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:49,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:49,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209434058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:49,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:49,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:49,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488768025] [2021-06-30 11:49:49,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:49,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:49,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:49,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:49,442 INFO L87 Difference]: Start difference. First operand 30815 states and 175458 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:50,070 INFO L93 Difference]: Finished difference Result 32866 states and 185759 transitions. [2021-06-30 11:49:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:50,208 INFO L225 Difference]: With dead ends: 32866 [2021-06-30 11:49:50,208 INFO L226 Difference]: Without dead ends: 32762 [2021-06-30 11:49:50,208 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32762 states. [2021-06-30 11:49:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32762 to 31601. [2021-06-30 11:49:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31601 states, 31600 states have (on average 5.695443037974684) internal successors, (179976), 31600 states have internal predecessors, (179976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31601 states to 31601 states and 179976 transitions. [2021-06-30 11:49:51,249 INFO L78 Accepts]: Start accepts. Automaton has 31601 states and 179976 transitions. Word has length 26 [2021-06-30 11:49:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:51,249 INFO L482 AbstractCegarLoop]: Abstraction has 31601 states and 179976 transitions. [2021-06-30 11:49:51,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 31601 states and 179976 transitions. [2021-06-30 11:49:51,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:51,588 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:51,588 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:51,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-30 11:49:51,801 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash -515641067, now seen corresponding path program 16 times [2021-06-30 11:49:51,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:51,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702533332] [2021-06-30 11:49:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:51,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:51,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702533332] [2021-06-30 11:49:51,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702533332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:51,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302501212] [2021-06-30 11:49:51,857 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 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 [2021-06-30 11:49:51,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:51,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:51,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:51,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302501212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:51,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:51,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:51,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055444127] [2021-06-30 11:49:51,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:51,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:51,929 INFO L87 Difference]: Start difference. First operand 31601 states and 179976 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:52,304 INFO L93 Difference]: Finished difference Result 33945 states and 191705 transitions. [2021-06-30 11:49:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:52,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:52,444 INFO L225 Difference]: With dead ends: 33945 [2021-06-30 11:49:52,444 INFO L226 Difference]: Without dead ends: 33907 [2021-06-30 11:49:52,445 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33907 states. [2021-06-30 11:49:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33907 to 32256. [2021-06-30 11:49:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32256 states, 32255 states have (on average 5.69694620988994) internal successors, (183755), 32255 states have internal predecessors, (183755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32256 states to 32256 states and 183755 transitions. [2021-06-30 11:49:53,904 INFO L78 Accepts]: Start accepts. Automaton has 32256 states and 183755 transitions. Word has length 26 [2021-06-30 11:49:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:53,904 INFO L482 AbstractCegarLoop]: Abstraction has 32256 states and 183755 transitions. [2021-06-30 11:49:53,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 32256 states and 183755 transitions. [2021-06-30 11:49:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:54,030 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:54,030 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:54,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-30 11:49:54,253 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2026319271, now seen corresponding path program 17 times [2021-06-30 11:49:54,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:54,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772520326] [2021-06-30 11:49:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:54,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:54,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772520326] [2021-06-30 11:49:54,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772520326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:54,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6462902] [2021-06-30 11:49:54,326 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 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 [2021-06-30 11:49:54,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-30 11:49:54,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:54,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:54,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6462902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:54,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:54,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:54,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361056573] [2021-06-30 11:49:54,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:54,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:54,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:54,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:54,456 INFO L87 Difference]: Start difference. First operand 32256 states and 183755 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:54,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:54,836 INFO L93 Difference]: Finished difference Result 34526 states and 195074 transitions. [2021-06-30 11:49:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:54,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:54,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:55,279 INFO L225 Difference]: With dead ends: 34526 [2021-06-30 11:49:55,280 INFO L226 Difference]: Without dead ends: 34377 [2021-06-30 11:49:55,280 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34377 states. [2021-06-30 11:49:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34377 to 32720. [2021-06-30 11:49:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32720 states, 32719 states have (on average 5.701732938048229) internal successors, (186555), 32719 states have internal predecessors, (186555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32720 states to 32720 states and 186555 transitions. [2021-06-30 11:49:56,315 INFO L78 Accepts]: Start accepts. Automaton has 32720 states and 186555 transitions. Word has length 26 [2021-06-30 11:49:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:56,315 INFO L482 AbstractCegarLoop]: Abstraction has 32720 states and 186555 transitions. [2021-06-30 11:49:56,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 32720 states and 186555 transitions. [2021-06-30 11:49:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:56,414 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:56,414 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:56,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:56,617 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:56,619 INFO L82 PathProgramCache]: Analyzing trace with hash -920492751, now seen corresponding path program 11 times [2021-06-30 11:49:56,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:56,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467696608] [2021-06-30 11:49:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:56,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:56,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467696608] [2021-06-30 11:49:56,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467696608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:56,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940749364] [2021-06-30 11:49:56,668 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 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 [2021-06-30 11:49:56,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:49:56,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:56,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:56,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:56,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940749364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:56,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:56,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:56,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477357331] [2021-06-30 11:49:56,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:56,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:56,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:56,731 INFO L87 Difference]: Start difference. First operand 32720 states and 186555 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:57,350 INFO L93 Difference]: Finished difference Result 35155 states and 198920 transitions. [2021-06-30 11:49:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:57,505 INFO L225 Difference]: With dead ends: 35155 [2021-06-30 11:49:57,505 INFO L226 Difference]: Without dead ends: 35075 [2021-06-30 11:49:57,506 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35075 states. [2021-06-30 11:49:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35075 to 33675. [2021-06-30 11:49:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33675 states, 33674 states have (on average 5.702678624458039) internal successors, (192032), 33674 states have internal predecessors, (192032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33675 states to 33675 states and 192032 transitions. [2021-06-30 11:49:58,840 INFO L78 Accepts]: Start accepts. Automaton has 33675 states and 192032 transitions. Word has length 26 [2021-06-30 11:49:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:58,841 INFO L482 AbstractCegarLoop]: Abstraction has 33675 states and 192032 transitions. [2021-06-30 11:49:58,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 33675 states and 192032 transitions. [2021-06-30 11:49:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:49:58,988 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:58,988 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:59,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:59,193 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:59,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1769115223, now seen corresponding path program 12 times [2021-06-30 11:49:59,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:59,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539043891] [2021-06-30 11:49:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:59,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:59,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539043891] [2021-06-30 11:49:59,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539043891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:59,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896380181] [2021-06-30 11:49:59,243 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 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 [2021-06-30 11:49:59,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:49:59,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:59,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:59,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896380181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:59,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:59,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:59,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49719828] [2021-06-30 11:49:59,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:59,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:59,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:59,318 INFO L87 Difference]: Start difference. First operand 33675 states and 192032 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:59,718 INFO L93 Difference]: Finished difference Result 35902 states and 203211 transitions. [2021-06-30 11:49:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:59,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:49:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:59,866 INFO L225 Difference]: With dead ends: 35902 [2021-06-30 11:49:59,867 INFO L226 Difference]: Without dead ends: 35868 [2021-06-30 11:49:59,867 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35868 states. [2021-06-30 11:50:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35868 to 34511. [2021-06-30 11:50:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34511 states, 34510 states have (on average 5.701651695160823) internal successors, (196764), 34510 states have internal predecessors, (196764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34511 states to 34511 states and 196764 transitions. [2021-06-30 11:50:01,248 INFO L78 Accepts]: Start accepts. Automaton has 34511 states and 196764 transitions. Word has length 26 [2021-06-30 11:50:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:01,249 INFO L482 AbstractCegarLoop]: Abstraction has 34511 states and 196764 transitions. [2021-06-30 11:50:01,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 34511 states and 196764 transitions. [2021-06-30 11:50:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:01,342 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:01,342 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:01,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-30 11:50:01,554 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:01,555 INFO L82 PathProgramCache]: Analyzing trace with hash -287211027, now seen corresponding path program 13 times [2021-06-30 11:50:01,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:01,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270610041] [2021-06-30 11:50:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:01,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:01,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270610041] [2021-06-30 11:50:01,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270610041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:01,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334589727] [2021-06-30 11:50:01,598 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 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 [2021-06-30 11:50:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:01,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:01,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:01,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334589727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:01,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:01,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:01,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417037319] [2021-06-30 11:50:01,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:01,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:01,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:01,661 INFO L87 Difference]: Start difference. First operand 34511 states and 196764 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:02,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:02,339 INFO L93 Difference]: Finished difference Result 36632 states and 207353 transitions. [2021-06-30 11:50:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:02,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:02,523 INFO L225 Difference]: With dead ends: 36632 [2021-06-30 11:50:02,524 INFO L226 Difference]: Without dead ends: 36524 [2021-06-30 11:50:02,524 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36524 states. [2021-06-30 11:50:03,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36524 to 34979. [2021-06-30 11:50:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34979 states, 34978 states have (on average 5.706043798959346) internal successors, (199586), 34978 states have internal predecessors, (199586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34979 states to 34979 states and 199586 transitions. [2021-06-30 11:50:03,787 INFO L78 Accepts]: Start accepts. Automaton has 34979 states and 199586 transitions. Word has length 26 [2021-06-30 11:50:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:03,787 INFO L482 AbstractCegarLoop]: Abstraction has 34979 states and 199586 transitions. [2021-06-30 11:50:03,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:03,787 INFO L276 IsEmpty]: Start isEmpty. Operand 34979 states and 199586 transitions. [2021-06-30 11:50:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:04,266 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:04,267 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:04,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-30 11:50:04,467 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697875, now seen corresponding path program 14 times [2021-06-30 11:50:04,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:04,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369562845] [2021-06-30 11:50:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:04,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:04,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369562845] [2021-06-30 11:50:04,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369562845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:04,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164857832] [2021-06-30 11:50:04,513 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 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 [2021-06-30 11:50:04,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:50:04,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:04,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:04,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:04,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164857832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:04,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:04,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:04,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841734976] [2021-06-30 11:50:04,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:04,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:04,575 INFO L87 Difference]: Start difference. First operand 34979 states and 199586 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:04,979 INFO L93 Difference]: Finished difference Result 37054 states and 209989 transitions. [2021-06-30 11:50:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:05,165 INFO L225 Difference]: With dead ends: 37054 [2021-06-30 11:50:05,165 INFO L226 Difference]: Without dead ends: 36917 [2021-06-30 11:50:05,166 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36917 states. [2021-06-30 11:50:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36917 to 35508. [2021-06-30 11:50:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35508 states, 35507 states have (on average 5.7125073929084405) internal successors, (202834), 35507 states have internal predecessors, (202834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35508 states to 35508 states and 202834 transitions. [2021-06-30 11:50:06,739 INFO L78 Accepts]: Start accepts. Automaton has 35508 states and 202834 transitions. Word has length 26 [2021-06-30 11:50:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:06,739 INFO L482 AbstractCegarLoop]: Abstraction has 35508 states and 202834 transitions. [2021-06-30 11:50:06,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:06,739 INFO L276 IsEmpty]: Start isEmpty. Operand 35508 states and 202834 transitions. [2021-06-30 11:50:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:06,845 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:06,845 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:07,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:07,046 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:07,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1439770465, now seen corresponding path program 19 times [2021-06-30 11:50:07,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:07,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900902896] [2021-06-30 11:50:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:07,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:07,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900902896] [2021-06-30 11:50:07,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900902896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:07,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519897040] [2021-06-30 11:50:07,090 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 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 [2021-06-30 11:50:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:07,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:07,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:07,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519897040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:07,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:07,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:07,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563873856] [2021-06-30 11:50:07,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:07,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:07,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:07,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:07,151 INFO L87 Difference]: Start difference. First operand 35508 states and 202834 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:07,843 INFO L93 Difference]: Finished difference Result 37934 states and 215165 transitions. [2021-06-30 11:50:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:07,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:07,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:08,037 INFO L225 Difference]: With dead ends: 37934 [2021-06-30 11:50:08,037 INFO L226 Difference]: Without dead ends: 37837 [2021-06-30 11:50:08,037 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37837 states. [2021-06-30 11:50:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37837 to 36432. [2021-06-30 11:50:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36432 states, 36431 states have (on average 5.716779665669348) internal successors, (208268), 36431 states have internal predecessors, (208268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36432 states to 36432 states and 208268 transitions. [2021-06-30 11:50:09,678 INFO L78 Accepts]: Start accepts. Automaton has 36432 states and 208268 transitions. Word has length 26 [2021-06-30 11:50:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:09,678 INFO L482 AbstractCegarLoop]: Abstraction has 36432 states and 208268 transitions. [2021-06-30 11:50:09,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 36432 states and 208268 transitions. [2021-06-30 11:50:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:09,801 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:09,801 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:10,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:10,003 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1507926113, now seen corresponding path program 20 times [2021-06-30 11:50:10,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:10,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215677975] [2021-06-30 11:50:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:10,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:10,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215677975] [2021-06-30 11:50:10,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215677975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:10,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309074870] [2021-06-30 11:50:10,081 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 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 [2021-06-30 11:50:10,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:50:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:10,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309074870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:10,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:10,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:10,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076234802] [2021-06-30 11:50:10,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:10,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:10,143 INFO L87 Difference]: Start difference. First operand 36432 states and 208268 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:10,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:10,576 INFO L93 Difference]: Finished difference Result 39566 states and 224505 transitions. [2021-06-30 11:50:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:10,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:11,158 INFO L225 Difference]: With dead ends: 39566 [2021-06-30 11:50:11,159 INFO L226 Difference]: Without dead ends: 39532 [2021-06-30 11:50:11,159 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39532 states. [2021-06-30 11:50:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39532 to 37891. [2021-06-30 11:50:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37891 states, 37890 states have (on average 5.719609395618897) internal successors, (216716), 37890 states have internal predecessors, (216716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37891 states to 37891 states and 216716 transitions. [2021-06-30 11:50:12,468 INFO L78 Accepts]: Start accepts. Automaton has 37891 states and 216716 transitions. Word has length 26 [2021-06-30 11:50:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:12,469 INFO L482 AbstractCegarLoop]: Abstraction has 37891 states and 216716 transitions. [2021-06-30 11:50:12,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:12,469 INFO L276 IsEmpty]: Start isEmpty. Operand 37891 states and 216716 transitions. [2021-06-30 11:50:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:12,573 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:12,574 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:12,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:12,795 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:12,796 INFO L82 PathProgramCache]: Analyzing trace with hash -629361633, now seen corresponding path program 21 times [2021-06-30 11:50:12,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:12,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822554575] [2021-06-30 11:50:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:12,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:12,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822554575] [2021-06-30 11:50:12,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822554575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:12,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037851686] [2021-06-30 11:50:12,841 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 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 [2021-06-30 11:50:12,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:50:12,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:12,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:12,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037851686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:12,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:12,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:12,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981446017] [2021-06-30 11:50:12,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:12,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:12,903 INFO L87 Difference]: Start difference. First operand 37891 states and 216716 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:13,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:13,722 INFO L93 Difference]: Finished difference Result 40897 states and 232218 transitions. [2021-06-30 11:50:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:13,911 INFO L225 Difference]: With dead ends: 40897 [2021-06-30 11:50:13,911 INFO L226 Difference]: Without dead ends: 40752 [2021-06-30 11:50:13,911 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40752 states. [2021-06-30 11:50:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40752 to 38971. [2021-06-30 11:50:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38971 states, 38970 states have (on average 5.728047215807031) internal successors, (223222), 38970 states have internal predecessors, (223222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38971 states to 38971 states and 223222 transitions. [2021-06-30 11:50:15,588 INFO L78 Accepts]: Start accepts. Automaton has 38971 states and 223222 transitions. Word has length 26 [2021-06-30 11:50:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:15,588 INFO L482 AbstractCegarLoop]: Abstraction has 38971 states and 223222 transitions. [2021-06-30 11:50:15,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 38971 states and 223222 transitions. [2021-06-30 11:50:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:15,707 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:15,707 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:15,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-30 11:50:15,907 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:15,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1669672283, now seen corresponding path program 22 times [2021-06-30 11:50:15,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:15,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880129146] [2021-06-30 11:50:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:15,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880129146] [2021-06-30 11:50:15,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880129146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575052410] [2021-06-30 11:50:15,951 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 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 [2021-06-30 11:50:15,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:50:15,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:15,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:16,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575052410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:16,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:16,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:16,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029650122] [2021-06-30 11:50:16,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:16,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:16,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:16,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:16,030 INFO L87 Difference]: Start difference. First operand 38971 states and 223222 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:16,765 INFO L93 Difference]: Finished difference Result 41774 states and 237364 transitions. [2021-06-30 11:50:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:16,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:16,960 INFO L225 Difference]: With dead ends: 41774 [2021-06-30 11:50:16,960 INFO L226 Difference]: Without dead ends: 41629 [2021-06-30 11:50:16,961 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:17,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41629 states. [2021-06-30 11:50:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41629 to 39669. [2021-06-30 11:50:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39669 states, 39668 states have (on average 5.734723202581426) internal successors, (227485), 39668 states have internal predecessors, (227485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39669 states to 39669 states and 227485 transitions. [2021-06-30 11:50:18,657 INFO L78 Accepts]: Start accepts. Automaton has 39669 states and 227485 transitions. Word has length 26 [2021-06-30 11:50:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:18,657 INFO L482 AbstractCegarLoop]: Abstraction has 39669 states and 227485 transitions. [2021-06-30 11:50:18,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 39669 states and 227485 transitions. [2021-06-30 11:50:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:18,802 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:18,802 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:19,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-30 11:50:19,003 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:19,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1906985077, now seen corresponding path program 19 times [2021-06-30 11:50:19,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:19,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428334449] [2021-06-30 11:50:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:19,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:19,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428334449] [2021-06-30 11:50:19,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428334449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:19,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565112405] [2021-06-30 11:50:19,053 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 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 [2021-06-30 11:50:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:19,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:19,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565112405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:19,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:19,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:19,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155979644] [2021-06-30 11:50:19,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:19,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:19,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:19,118 INFO L87 Difference]: Start difference. First operand 39669 states and 227485 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:19,853 INFO L93 Difference]: Finished difference Result 42060 states and 239679 transitions. [2021-06-30 11:50:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:20,057 INFO L225 Difference]: With dead ends: 42060 [2021-06-30 11:50:20,057 INFO L226 Difference]: Without dead ends: 41967 [2021-06-30 11:50:20,057 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41967 states. [2021-06-30 11:50:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41967 to 40556. [2021-06-30 11:50:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40556 states, 40555 states have (on average 5.739834792257428) internal successors, (232779), 40555 states have internal predecessors, (232779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:21,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40556 states to 40556 states and 232779 transitions. [2021-06-30 11:50:21,740 INFO L78 Accepts]: Start accepts. Automaton has 40556 states and 232779 transitions. Word has length 26 [2021-06-30 11:50:21,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:21,741 INFO L482 AbstractCegarLoop]: Abstraction has 40556 states and 232779 transitions. [2021-06-30 11:50:21,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand 40556 states and 232779 transitions. [2021-06-30 11:50:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:21,888 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:21,888 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:22,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:22,089 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash -138191221, now seen corresponding path program 20 times [2021-06-30 11:50:22,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:22,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366695028] [2021-06-30 11:50:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:22,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:22,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366695028] [2021-06-30 11:50:22,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366695028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:22,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356975157] [2021-06-30 11:50:22,152 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 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 [2021-06-30 11:50:22,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:50:22,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:22,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356975157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:22,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:22,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:22,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260040755] [2021-06-30 11:50:22,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:22,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:22,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:22,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:22,236 INFO L87 Difference]: Start difference. First operand 40556 states and 232779 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:23,064 INFO L93 Difference]: Finished difference Result 43436 states and 247600 transitions. [2021-06-30 11:50:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:23,300 INFO L225 Difference]: With dead ends: 43436 [2021-06-30 11:50:23,300 INFO L226 Difference]: Without dead ends: 43406 [2021-06-30 11:50:23,300 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43406 states. [2021-06-30 11:50:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43406 to 41910. [2021-06-30 11:50:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41910 states, 41909 states have (on average 5.7420840392278505) internal successors, (240645), 41909 states have internal predecessors, (240645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41910 states to 41910 states and 240645 transitions. [2021-06-30 11:50:25,368 INFO L78 Accepts]: Start accepts. Automaton has 41910 states and 240645 transitions. Word has length 26 [2021-06-30 11:50:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:25,368 INFO L482 AbstractCegarLoop]: Abstraction has 41910 states and 240645 transitions. [2021-06-30 11:50:25,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 41910 states and 240645 transitions. [2021-06-30 11:50:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:25,533 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:25,533 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:25,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-30 11:50:25,734 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:25,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1444488949, now seen corresponding path program 21 times [2021-06-30 11:50:25,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:25,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976714895] [2021-06-30 11:50:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:25,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:25,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976714895] [2021-06-30 11:50:25,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976714895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:25,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179456427] [2021-06-30 11:50:25,780 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 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 [2021-06-30 11:50:25,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:50:25,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:25,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:25,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:25,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179456427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:25,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:25,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:25,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199185757] [2021-06-30 11:50:25,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:25,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:25,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:25,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:25,861 INFO L87 Difference]: Start difference. First operand 41910 states and 240645 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:26,661 INFO L93 Difference]: Finished difference Result 44790 states and 255520 transitions. [2021-06-30 11:50:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:26,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:26,912 INFO L225 Difference]: With dead ends: 44790 [2021-06-30 11:50:26,912 INFO L226 Difference]: Without dead ends: 44686 [2021-06-30 11:50:26,912 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:27,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44686 states. [2021-06-30 11:50:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44686 to 42990. [2021-06-30 11:50:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 5.74926143897276) internal successors, (247155), 42989 states have internal predecessors, (247155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 247155 transitions. [2021-06-30 11:50:28,755 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 247155 transitions. Word has length 26 [2021-06-30 11:50:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:28,755 INFO L482 AbstractCegarLoop]: Abstraction has 42990 states and 247155 transitions. [2021-06-30 11:50:28,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 247155 transitions. [2021-06-30 11:50:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:28,917 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:28,917 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:29,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:29,117 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:29,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1255560121, now seen corresponding path program 22 times [2021-06-30 11:50:29,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:29,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8010943] [2021-06-30 11:50:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:29,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:29,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8010943] [2021-06-30 11:50:29,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8010943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:29,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300942270] [2021-06-30 11:50:29,163 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 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 [2021-06-30 11:50:29,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:50:29,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:29,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300942270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:29,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:29,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:29,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620141987] [2021-06-30 11:50:29,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:29,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:29,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:29,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:29,231 INFO L87 Difference]: Start difference. First operand 42990 states and 247155 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:30,053 INFO L93 Difference]: Finished difference Result 45588 states and 260255 transitions. [2021-06-30 11:50:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:30,283 INFO L225 Difference]: With dead ends: 45588 [2021-06-30 11:50:30,283 INFO L226 Difference]: Without dead ends: 45484 [2021-06-30 11:50:30,283 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45484 states. [2021-06-30 11:50:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45484 to 43700. [2021-06-30 11:50:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43700 states, 43699 states have (on average 5.754616810453329) internal successors, (251471), 43699 states have internal predecessors, (251471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43700 states to 43700 states and 251471 transitions. [2021-06-30 11:50:32,012 INFO L78 Accepts]: Start accepts. Automaton has 43700 states and 251471 transitions. Word has length 26 [2021-06-30 11:50:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:32,012 INFO L482 AbstractCegarLoop]: Abstraction has 43700 states and 251471 transitions. [2021-06-30 11:50:32,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 43700 states and 251471 transitions. [2021-06-30 11:50:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:32,153 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:32,153 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:32,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-30 11:50:32,353 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:32,354 INFO L82 PathProgramCache]: Analyzing trace with hash -335488677, now seen corresponding path program 19 times [2021-06-30 11:50:32,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:32,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204824142] [2021-06-30 11:50:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:32,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:32,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204824142] [2021-06-30 11:50:32,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204824142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:32,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131790293] [2021-06-30 11:50:32,401 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 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 [2021-06-30 11:50:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:32,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131790293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:32,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:32,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:32,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990578281] [2021-06-30 11:50:32,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:32,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:32,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:32,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:32,463 INFO L87 Difference]: Start difference. First operand 43700 states and 251471 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:33,277 INFO L93 Difference]: Finished difference Result 45551 states and 260759 transitions. [2021-06-30 11:50:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:33,501 INFO L225 Difference]: With dead ends: 45551 [2021-06-30 11:50:33,501 INFO L226 Difference]: Without dead ends: 45443 [2021-06-30 11:50:33,501 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45443 states. [2021-06-30 11:50:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45443 to 44304. [2021-06-30 11:50:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44304 states, 44303 states have (on average 5.755885605940907) internal successors, (255003), 44303 states have internal predecessors, (255003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44304 states to 44304 states and 255003 transitions. [2021-06-30 11:50:35,276 INFO L78 Accepts]: Start accepts. Automaton has 44304 states and 255003 transitions. Word has length 26 [2021-06-30 11:50:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:35,276 INFO L482 AbstractCegarLoop]: Abstraction has 44304 states and 255003 transitions. [2021-06-30 11:50:35,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 44304 states and 255003 transitions. [2021-06-30 11:50:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:35,413 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:35,413 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:35,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:35,613 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash 415694939, now seen corresponding path program 20 times [2021-06-30 11:50:35,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:35,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035525850] [2021-06-30 11:50:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:35,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:35,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035525850] [2021-06-30 11:50:35,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035525850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:35,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007482865] [2021-06-30 11:50:35,670 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 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 [2021-06-30 11:50:35,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:50:35,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:35,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:35,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:35,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007482865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:35,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:35,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:35,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875287736] [2021-06-30 11:50:35,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:35,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:35,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:35,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:35,732 INFO L87 Difference]: Start difference. First operand 44304 states and 255003 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:36,558 INFO L93 Difference]: Finished difference Result 46498 states and 266031 transitions. [2021-06-30 11:50:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:36,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:36,793 INFO L225 Difference]: With dead ends: 46498 [2021-06-30 11:50:36,793 INFO L226 Difference]: Without dead ends: 46456 [2021-06-30 11:50:36,793 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46456 states. [2021-06-30 11:50:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46456 to 45252. [2021-06-30 11:50:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45252 states, 45251 states have (on average 5.752778944111732) internal successors, (260319), 45251 states have internal predecessors, (260319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45252 states to 45252 states and 260319 transitions. [2021-06-30 11:50:38,584 INFO L78 Accepts]: Start accepts. Automaton has 45252 states and 260319 transitions. Word has length 26 [2021-06-30 11:50:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:38,584 INFO L482 AbstractCegarLoop]: Abstraction has 45252 states and 260319 transitions. [2021-06-30 11:50:38,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 45252 states and 260319 transitions. [2021-06-30 11:50:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:38,709 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:38,709 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:38,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:38,910 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:38,910 INFO L82 PathProgramCache]: Analyzing trace with hash -840764709, now seen corresponding path program 21 times [2021-06-30 11:50:38,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:38,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009868201] [2021-06-30 11:50:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:38,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:38,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009868201] [2021-06-30 11:50:38,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009868201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:38,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020147359] [2021-06-30 11:50:38,957 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 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 [2021-06-30 11:50:38,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:50:38,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:38,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:39,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020147359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:39,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:39,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:39,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887959065] [2021-06-30 11:50:39,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:39,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:39,022 INFO L87 Difference]: Start difference. First operand 45252 states and 260319 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:39,824 INFO L93 Difference]: Finished difference Result 47471 states and 271573 transitions. [2021-06-30 11:50:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:40,045 INFO L225 Difference]: With dead ends: 47471 [2021-06-30 11:50:40,046 INFO L226 Difference]: Without dead ends: 47281 [2021-06-30 11:50:40,046 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47281 states. [2021-06-30 11:50:41,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47281 to 45942. [2021-06-30 11:50:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45942 states, 45941 states have (on average 5.756731459915979) internal successors, (264470), 45941 states have internal predecessors, (264470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45942 states to 45942 states and 264470 transitions. [2021-06-30 11:50:41,844 INFO L78 Accepts]: Start accepts. Automaton has 45942 states and 264470 transitions. Word has length 26 [2021-06-30 11:50:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:41,844 INFO L482 AbstractCegarLoop]: Abstraction has 45942 states and 264470 transitions. [2021-06-30 11:50:41,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 45942 states and 264470 transitions. [2021-06-30 11:50:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:41,967 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:41,967 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:42,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:42,168 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:42,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:42,168 INFO L82 PathProgramCache]: Analyzing trace with hash -701673961, now seen corresponding path program 22 times [2021-06-30 11:50:42,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:42,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107289940] [2021-06-30 11:50:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:42,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:42,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107289940] [2021-06-30 11:50:42,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107289940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:42,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536309664] [2021-06-30 11:50:42,213 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 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 [2021-06-30 11:50:42,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:50:42,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:42,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:42,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:50:42,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536309664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:42,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:42,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:42,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298687324] [2021-06-30 11:50:42,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:42,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:42,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:42,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:42,283 INFO L87 Difference]: Start difference. First operand 45942 states and 264470 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:43,074 INFO L93 Difference]: Finished difference Result 47930 states and 274358 transitions. [2021-06-30 11:50:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:43,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:43,306 INFO L225 Difference]: With dead ends: 47930 [2021-06-30 11:50:43,307 INFO L226 Difference]: Without dead ends: 47740 [2021-06-30 11:50:43,307 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47740 states. [2021-06-30 11:50:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47740 to 46388. [2021-06-30 11:50:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46388 states, 46387 states have (on average 5.760212990708603) internal successors, (267199), 46387 states have internal predecessors, (267199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46388 states to 46388 states and 267199 transitions. [2021-06-30 11:50:45,057 INFO L78 Accepts]: Start accepts. Automaton has 46388 states and 267199 transitions. Word has length 26 [2021-06-30 11:50:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:45,058 INFO L482 AbstractCegarLoop]: Abstraction has 46388 states and 267199 transitions. [2021-06-30 11:50:45,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 46388 states and 267199 transitions. [2021-06-30 11:50:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:45,516 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:45,516 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:45,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:45,742 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:45,742 INFO L82 PathProgramCache]: Analyzing trace with hash 101347103, now seen corresponding path program 1 times [2021-06-30 11:50:45,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:45,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018913662] [2021-06-30 11:50:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:45,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:45,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018913662] [2021-06-30 11:50:45,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018913662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:45,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210553728] [2021-06-30 11:50:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-30 11:50:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:45,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:45,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:45,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210553728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:45,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:45,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:50:45,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144688094] [2021-06-30 11:50:45,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:50:45,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:50:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:50:45,843 INFO L87 Difference]: Start difference. First operand 46388 states and 267199 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:46,278 INFO L93 Difference]: Finished difference Result 47983 states and 274664 transitions. [2021-06-30 11:50:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:50:46,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:46,477 INFO L225 Difference]: With dead ends: 47983 [2021-06-30 11:50:46,477 INFO L226 Difference]: Without dead ends: 47900 [2021-06-30 11:50:46,478 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:50:46,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47900 states. [2021-06-30 11:50:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47900 to 46805. [2021-06-30 11:50:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46805 states, 46804 states have (on average 5.757584821810101) internal successors, (269478), 46804 states have internal predecessors, (269478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46805 states to 46805 states and 269478 transitions. [2021-06-30 11:50:48,525 INFO L78 Accepts]: Start accepts. Automaton has 46805 states and 269478 transitions. Word has length 26 [2021-06-30 11:50:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:48,526 INFO L482 AbstractCegarLoop]: Abstraction has 46805 states and 269478 transitions. [2021-06-30 11:50:48,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 46805 states and 269478 transitions. [2021-06-30 11:50:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:48,740 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:48,740 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:48,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:48,953 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:48,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1020650523, now seen corresponding path program 2 times [2021-06-30 11:50:48,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:48,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526194149] [2021-06-30 11:50:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:48,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:48,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526194149] [2021-06-30 11:50:48,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526194149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:48,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241585727] [2021-06-30 11:50:48,996 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 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 [2021-06-30 11:50:49,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:50:49,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:49,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:49,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241585727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:49,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:49,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:49,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475415672] [2021-06-30 11:50:49,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:49,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:49,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:49,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:49,057 INFO L87 Difference]: Start difference. First operand 46805 states and 269478 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:49,523 INFO L93 Difference]: Finished difference Result 48215 states and 275957 transitions. [2021-06-30 11:50:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:49,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:50,153 INFO L225 Difference]: With dead ends: 48215 [2021-06-30 11:50:50,153 INFO L226 Difference]: Without dead ends: 48099 [2021-06-30 11:50:50,153 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48099 states. [2021-06-30 11:50:51,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48099 to 46775. [2021-06-30 11:50:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46775 states, 46774 states have (on average 5.757172788301193) internal successors, (269286), 46774 states have internal predecessors, (269286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46775 states to 46775 states and 269286 transitions. [2021-06-30 11:50:52,079 INFO L78 Accepts]: Start accepts. Automaton has 46775 states and 269286 transitions. Word has length 26 [2021-06-30 11:50:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:52,079 INFO L482 AbstractCegarLoop]: Abstraction has 46775 states and 269286 transitions. [2021-06-30 11:50:52,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 46775 states and 269286 transitions. [2021-06-30 11:50:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:52,242 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:52,243 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:52,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-30 11:50:52,443 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2118008801, now seen corresponding path program 3 times [2021-06-30 11:50:52,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:52,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556889299] [2021-06-30 11:50:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:52,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:52,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556889299] [2021-06-30 11:50:52,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556889299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:52,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773647214] [2021-06-30 11:50:52,487 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 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 [2021-06-30 11:50:52,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-30 11:50:52,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:52,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:52,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:52,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773647214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:52,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:52,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:52,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512635587] [2021-06-30 11:50:52,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:52,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:52,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:52,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:52,559 INFO L87 Difference]: Start difference. First operand 46775 states and 269286 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:53,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:53,552 INFO L93 Difference]: Finished difference Result 48084 states and 275488 transitions. [2021-06-30 11:50:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:53,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:53,945 INFO L225 Difference]: With dead ends: 48084 [2021-06-30 11:50:53,945 INFO L226 Difference]: Without dead ends: 48063 [2021-06-30 11:50:53,945 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48063 states. [2021-06-30 11:50:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48063 to 47051. [2021-06-30 11:50:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47051 states, 47050 states have (on average 5.758278427205101) internal successors, (270927), 47050 states have internal predecessors, (270927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47051 states to 47051 states and 270927 transitions. [2021-06-30 11:50:55,840 INFO L78 Accepts]: Start accepts. Automaton has 47051 states and 270927 transitions. Word has length 26 [2021-06-30 11:50:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:55,840 INFO L482 AbstractCegarLoop]: Abstraction has 47051 states and 270927 transitions. [2021-06-30 11:50:55,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 47051 states and 270927 transitions. [2021-06-30 11:50:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:55,965 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:55,965 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:56,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:56,166 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:56,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:56,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1114455397, now seen corresponding path program 4 times [2021-06-30 11:50:56,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:56,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187700888] [2021-06-30 11:50:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:56,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:56,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187700888] [2021-06-30 11:50:56,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187700888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:56,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954055159] [2021-06-30 11:50:56,216 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 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 [2021-06-30 11:50:56,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:50:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:56,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:56,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954055159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:56,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:56,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:56,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845723376] [2021-06-30 11:50:56,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:56,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:56,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:56,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:56,285 INFO L87 Difference]: Start difference. First operand 47051 states and 270927 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:57,109 INFO L93 Difference]: Finished difference Result 48587 states and 278341 transitions. [2021-06-30 11:50:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:57,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:50:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:57,338 INFO L225 Difference]: With dead ends: 48587 [2021-06-30 11:50:57,338 INFO L226 Difference]: Without dead ends: 48504 [2021-06-30 11:50:57,338 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48504 states. [2021-06-30 11:50:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48504 to 47528. [2021-06-30 11:50:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47528 states, 47527 states have (on average 5.757969154375408) internal successors, (273659), 47527 states have internal predecessors, (273659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47528 states to 47528 states and 273659 transitions. [2021-06-30 11:50:59,032 INFO L78 Accepts]: Start accepts. Automaton has 47528 states and 273659 transitions. Word has length 26 [2021-06-30 11:50:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:59,032 INFO L482 AbstractCegarLoop]: Abstraction has 47528 states and 273659 transitions. [2021-06-30 11:50:59,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 47528 states and 273659 transitions. [2021-06-30 11:50:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:50:59,497 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:59,497 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:59,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-30 11:50:59,698 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:59,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:59,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1145885531, now seen corresponding path program 5 times [2021-06-30 11:50:59,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:59,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344347273] [2021-06-30 11:50:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:59,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:59,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344347273] [2021-06-30 11:50:59,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344347273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:59,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44555982] [2021-06-30 11:50:59,743 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 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 [2021-06-30 11:50:59,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:50:59,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:59,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:59,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:59,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44555982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:59,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:59,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:59,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408675373] [2021-06-30 11:50:59,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:59,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:59,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:59,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:59,821 INFO L87 Difference]: Start difference. First operand 47528 states and 273659 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:00,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:00,306 INFO L93 Difference]: Finished difference Result 49284 states and 282186 transitions. [2021-06-30 11:51:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:00,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:00,792 INFO L225 Difference]: With dead ends: 49284 [2021-06-30 11:51:00,793 INFO L226 Difference]: Without dead ends: 49229 [2021-06-30 11:51:00,793 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49229 states. [2021-06-30 11:51:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49229 to 47991. [2021-06-30 11:51:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47991 states, 47990 states have (on average 5.757762033757032) internal successors, (276315), 47990 states have internal predecessors, (276315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:02,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 276315 transitions. [2021-06-30 11:51:02,555 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 276315 transitions. Word has length 26 [2021-06-30 11:51:02,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:02,555 INFO L482 AbstractCegarLoop]: Abstraction has 47991 states and 276315 transitions. [2021-06-30 11:51:02,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 276315 transitions. [2021-06-30 11:51:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:02,761 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:02,761 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:02,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-30 11:51:02,962 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:02,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:02,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1724084741, now seen corresponding path program 6 times [2021-06-30 11:51:02,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:02,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337473654] [2021-06-30 11:51:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:03,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:03,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337473654] [2021-06-30 11:51:03,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337473654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:03,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35188523] [2021-06-30 11:51:03,002 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 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 [2021-06-30 11:51:03,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:51:03,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:03,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35188523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:03,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:03,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:51:03,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847692771] [2021-06-30 11:51:03,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:51:03,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:51:03,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:03,086 INFO L87 Difference]: Start difference. First operand 47991 states and 276315 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:03,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:03,951 INFO L93 Difference]: Finished difference Result 49564 states and 283848 transitions. [2021-06-30 11:51:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:51:03,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:04,205 INFO L225 Difference]: With dead ends: 49564 [2021-06-30 11:51:04,205 INFO L226 Difference]: Without dead ends: 49509 [2021-06-30 11:51:04,205 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49509 states. [2021-06-30 11:51:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49509 to 48467. [2021-06-30 11:51:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48467 states, 48466 states have (on average 5.756138323773367) internal successors, (278977), 48466 states have internal predecessors, (278977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48467 states to 48467 states and 278977 transitions. [2021-06-30 11:51:06,094 INFO L78 Accepts]: Start accepts. Automaton has 48467 states and 278977 transitions. Word has length 26 [2021-06-30 11:51:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:06,095 INFO L482 AbstractCegarLoop]: Abstraction has 48467 states and 278977 transitions. [2021-06-30 11:51:06,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 48467 states and 278977 transitions. [2021-06-30 11:51:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:06,231 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:06,231 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:06,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:06,432 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash -720531337, now seen corresponding path program 7 times [2021-06-30 11:51:06,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:06,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747281633] [2021-06-30 11:51:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:06,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:06,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747281633] [2021-06-30 11:51:06,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747281633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:06,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25149271] [2021-06-30 11:51:06,474 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 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 [2021-06-30 11:51:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:06,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:06,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25149271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:06,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:06,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:06,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437308340] [2021-06-30 11:51:06,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:06,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:06,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:06,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:06,536 INFO L87 Difference]: Start difference. First operand 48467 states and 278977 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:07,317 INFO L93 Difference]: Finished difference Result 50197 states and 287262 transitions. [2021-06-30 11:51:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:07,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:07,540 INFO L225 Difference]: With dead ends: 50197 [2021-06-30 11:51:07,540 INFO L226 Difference]: Without dead ends: 50086 [2021-06-30 11:51:07,540 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50086 states. [2021-06-30 11:51:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50086 to 48759. [2021-06-30 11:51:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48759 states, 48758 states have (on average 5.754891504983798) internal successors, (280597), 48758 states have internal predecessors, (280597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48759 states to 48759 states and 280597 transitions. [2021-06-30 11:51:09,244 INFO L78 Accepts]: Start accepts. Automaton has 48759 states and 280597 transitions. Word has length 26 [2021-06-30 11:51:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:09,244 INFO L482 AbstractCegarLoop]: Abstraction has 48759 states and 280597 transitions. [2021-06-30 11:51:09,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 48759 states and 280597 transitions. [2021-06-30 11:51:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:09,367 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:09,367 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forcibly destroying the process [2021-06-30 11:51:09,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:09,674 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:09,674 INFO L82 PathProgramCache]: Analyzing trace with hash 346795519, now seen corresponding path program 8 times [2021-06-30 11:51:09,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:09,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672246379] [2021-06-30 11:51:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] The stream was forcibly closed: stdIn [2021-06-30 11:51:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:09,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:09,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672246379] [2021-06-30 11:51:09,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672246379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:09,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713920353] [2021-06-30 11:51:09,761 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 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 [2021-06-30 11:51:09,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:51:09,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713920353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:09,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:09,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:09,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414711207] [2021-06-30 11:51:09,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:09,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:09,830 INFO L87 Difference]: Start difference. First operand 48759 states and 280597 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:10,364 INFO L93 Difference]: Finished difference Result 50456 states and 288892 transitions. [2021-06-30 11:51:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:10,872 INFO L225 Difference]: With dead ends: 50456 [2021-06-30 11:51:10,872 INFO L226 Difference]: Without dead ends: 50401 [2021-06-30 11:51:10,872 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50401 states. [2021-06-30 11:51:12,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50401 to 49233. [2021-06-30 11:51:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49233 states, 49232 states have (on average 5.756398277543061) internal successors, (283399), 49232 states have internal predecessors, (283399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49233 states to 49233 states and 283399 transitions. [2021-06-30 11:51:12,827 INFO L78 Accepts]: Start accepts. Automaton has 49233 states and 283399 transitions. Word has length 26 [2021-06-30 11:51:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:12,827 INFO L482 AbstractCegarLoop]: Abstraction has 49233 states and 283399 transitions. [2021-06-30 11:51:12,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 49233 states and 283399 transitions. [2021-06-30 11:51:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:12,998 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:12,998 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:13,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-30 11:51:13,198 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:13,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1350348923, now seen corresponding path program 9 times [2021-06-30 11:51:13,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:13,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412172235] [2021-06-30 11:51:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:13,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:13,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412172235] [2021-06-30 11:51:13,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412172235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:13,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526351563] [2021-06-30 11:51:13,247 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 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 [2021-06-30 11:51:13,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-30 11:51:13,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:13,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:13,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526351563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:13,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:13,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:13,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296218485] [2021-06-30 11:51:13,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:13,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:13,325 INFO L87 Difference]: Start difference. First operand 49233 states and 283399 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:14,166 INFO L93 Difference]: Finished difference Result 51227 states and 293190 transitions. [2021-06-30 11:51:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:14,438 INFO L225 Difference]: With dead ends: 51227 [2021-06-30 11:51:14,438 INFO L226 Difference]: Without dead ends: 51192 [2021-06-30 11:51:14,439 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51192 states. [2021-06-30 11:51:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51192 to 49896. [2021-06-30 11:51:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49896 states, 49895 states have (on average 5.757831446036677) internal successors, (287287), 49895 states have internal predecessors, (287287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49896 states to 49896 states and 287287 transitions. [2021-06-30 11:51:16,189 INFO L78 Accepts]: Start accepts. Automaton has 49896 states and 287287 transitions. Word has length 26 [2021-06-30 11:51:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:16,189 INFO L482 AbstractCegarLoop]: Abstraction has 49896 states and 287287 transitions. [2021-06-30 11:51:16,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 49896 states and 287287 transitions. [2021-06-30 11:51:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:16,320 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:16,320 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:16,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:16,521 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash 151226295, now seen corresponding path program 10 times [2021-06-30 11:51:16,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:16,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340901373] [2021-06-30 11:51:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:16,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:16,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340901373] [2021-06-30 11:51:16,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340901373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:16,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55135225] [2021-06-30 11:51:16,577 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 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 [2021-06-30 11:51:16,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:51:16,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:16,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:16,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55135225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:16,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:16,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:16,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636177394] [2021-06-30 11:51:16,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:16,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:16,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:16,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:16,661 INFO L87 Difference]: Start difference. First operand 49896 states and 287287 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:17,471 INFO L93 Difference]: Finished difference Result 52009 states and 297716 transitions. [2021-06-30 11:51:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:17,682 INFO L225 Difference]: With dead ends: 52009 [2021-06-30 11:51:17,682 INFO L226 Difference]: Without dead ends: 51881 [2021-06-30 11:51:17,682 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51881 states. [2021-06-30 11:51:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51881 to 50656. [2021-06-30 11:51:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50656 states, 50655 states have (on average 5.756825584838614) internal successors, (291612), 50655 states have internal predecessors, (291612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50656 states to 50656 states and 291612 transitions. [2021-06-30 11:51:20,098 INFO L78 Accepts]: Start accepts. Automaton has 50656 states and 291612 transitions. Word has length 26 [2021-06-30 11:51:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:20,098 INFO L482 AbstractCegarLoop]: Abstraction has 50656 states and 291612 transitions. [2021-06-30 11:51:20,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 50656 states and 291612 transitions. [2021-06-30 11:51:20,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:20,406 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:20,406 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:20,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:20,630 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash -751977673, now seen corresponding path program 11 times [2021-06-30 11:51:20,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:20,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316302698] [2021-06-30 11:51:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:20,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:20,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316302698] [2021-06-30 11:51:20,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316302698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:20,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394926110] [2021-06-30 11:51:20,697 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 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 [2021-06-30 11:51:20,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:51:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:20,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:20,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:20,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394926110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:20,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:20,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:20,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294389583] [2021-06-30 11:51:20,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:20,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:20,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:20,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:20,777 INFO L87 Difference]: Start difference. First operand 50656 states and 291612 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:21,756 INFO L93 Difference]: Finished difference Result 53105 states and 304087 transitions. [2021-06-30 11:51:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:21,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:21,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:22,294 INFO L225 Difference]: With dead ends: 53105 [2021-06-30 11:51:22,294 INFO L226 Difference]: Without dead ends: 53025 [2021-06-30 11:51:22,294 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53025 states. [2021-06-30 11:51:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53025 to 51954. [2021-06-30 11:51:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51954 states, 51953 states have (on average 5.753642715531345) internal successors, (298919), 51953 states have internal predecessors, (298919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51954 states to 51954 states and 298919 transitions. [2021-06-30 11:51:24,263 INFO L78 Accepts]: Start accepts. Automaton has 51954 states and 298919 transitions. Word has length 26 [2021-06-30 11:51:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:24,263 INFO L482 AbstractCegarLoop]: Abstraction has 51954 states and 298919 transitions. [2021-06-30 11:51:24,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 51954 states and 298919 transitions. [2021-06-30 11:51:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:24,412 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:24,412 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:24,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:24,613 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1783050637, now seen corresponding path program 12 times [2021-06-30 11:51:24,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:24,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456495395] [2021-06-30 11:51:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:24,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:24,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456495395] [2021-06-30 11:51:24,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456495395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:24,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928272169] [2021-06-30 11:51:24,658 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 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 [2021-06-30 11:51:24,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:51:24,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:24,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:24,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:24,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928272169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:24,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:24,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73565927] [2021-06-30 11:51:24,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:24,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:24,737 INFO L87 Difference]: Start difference. First operand 51954 states and 298919 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:25,555 INFO L93 Difference]: Finished difference Result 54324 states and 310774 transitions. [2021-06-30 11:51:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:25,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:25,789 INFO L225 Difference]: With dead ends: 54324 [2021-06-30 11:51:25,790 INFO L226 Difference]: Without dead ends: 54290 [2021-06-30 11:51:25,790 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54290 states. [2021-06-30 11:51:27,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54290 to 53103. [2021-06-30 11:51:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53103 states, 53102 states have (on average 5.750668524725999) internal successors, (305372), 53102 states have internal predecessors, (305372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53103 states to 53103 states and 305372 transitions. [2021-06-30 11:51:27,997 INFO L78 Accepts]: Start accepts. Automaton has 53103 states and 305372 transitions. Word has length 26 [2021-06-30 11:51:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:27,997 INFO L482 AbstractCegarLoop]: Abstraction has 53103 states and 305372 transitions. [2021-06-30 11:51:27,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 53103 states and 305372 transitions. [2021-06-30 11:51:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:28,211 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:28,211 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:28,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-30 11:51:28,417 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash 268750899, now seen corresponding path program 13 times [2021-06-30 11:51:28,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:28,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186311603] [2021-06-30 11:51:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:28,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:28,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186311603] [2021-06-30 11:51:28,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186311603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:28,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834196491] [2021-06-30 11:51:28,461 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 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 [2021-06-30 11:51:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:28,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:28,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:28,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834196491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:28,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:28,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:28,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863146601] [2021-06-30 11:51:28,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:28,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:28,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:28,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:28,531 INFO L87 Difference]: Start difference. First operand 53103 states and 305372 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:29,418 INFO L93 Difference]: Finished difference Result 55685 states and 318364 transitions. [2021-06-30 11:51:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:29,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:29,707 INFO L225 Difference]: With dead ends: 55685 [2021-06-30 11:51:29,707 INFO L226 Difference]: Without dead ends: 55399 [2021-06-30 11:51:29,708 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55399 states. [2021-06-30 11:51:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55399 to 53833. [2021-06-30 11:51:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53833 states, 53832 states have (on average 5.75663174320107) internal successors, (309891), 53832 states have internal predecessors, (309891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53833 states to 53833 states and 309891 transitions. [2021-06-30 11:51:31,604 INFO L78 Accepts]: Start accepts. Automaton has 53833 states and 309891 transitions. Word has length 26 [2021-06-30 11:51:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:31,605 INFO L482 AbstractCegarLoop]: Abstraction has 53833 states and 309891 transitions. [2021-06-30 11:51:31,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 53833 states and 309891 transitions. [2021-06-30 11:51:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:32,130 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:32,130 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-30 11:51:32,345 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1008189221, now seen corresponding path program 14 times [2021-06-30 11:51:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:32,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265132218] [2021-06-30 11:51:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:32,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:32,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265132218] [2021-06-30 11:51:32,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265132218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:32,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810305595] [2021-06-30 11:51:32,390 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 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 [2021-06-30 11:51:32,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:51:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:32,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:32,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:32,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810305595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:32,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:32,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:32,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223549036] [2021-06-30 11:51:32,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:32,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:32,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:32,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:32,467 INFO L87 Difference]: Start difference. First operand 53833 states and 309891 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:32,982 INFO L93 Difference]: Finished difference Result 56015 states and 320786 transitions. [2021-06-30 11:51:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:32,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:33,552 INFO L225 Difference]: With dead ends: 56015 [2021-06-30 11:51:33,552 INFO L226 Difference]: Without dead ends: 55907 [2021-06-30 11:51:33,552 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55907 states. [2021-06-30 11:51:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55907 to 54561. [2021-06-30 11:51:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54561 states, 54560 states have (on average 5.759255865102639) internal successors, (314225), 54560 states have internal predecessors, (314225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54561 states to 54561 states and 314225 transitions. [2021-06-30 11:51:35,525 INFO L78 Accepts]: Start accepts. Automaton has 54561 states and 314225 transitions. Word has length 26 [2021-06-30 11:51:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:35,526 INFO L482 AbstractCegarLoop]: Abstraction has 54561 states and 314225 transitions. [2021-06-30 11:51:35,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 54561 states and 314225 transitions. [2021-06-30 11:51:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:35,664 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:35,664 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:35,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-30 11:51:35,865 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1305081933, now seen corresponding path program 1 times [2021-06-30 11:51:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:35,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681555195] [2021-06-30 11:51:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:51:35,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:35,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681555195] [2021-06-30 11:51:35,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681555195] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:51:35,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:51:35,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:51:35,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824839865] [2021-06-30 11:51:35,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:51:35,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:35,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:51:35,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:35,893 INFO L87 Difference]: Start difference. First operand 54561 states and 314225 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:36,716 INFO L93 Difference]: Finished difference Result 56171 states and 321672 transitions. [2021-06-30 11:51:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:51:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:36,967 INFO L225 Difference]: With dead ends: 56171 [2021-06-30 11:51:36,967 INFO L226 Difference]: Without dead ends: 56129 [2021-06-30 11:51:36,967 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:37,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56129 states. [2021-06-30 11:51:38,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56129 to 54999. [2021-06-30 11:51:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54999 states, 54998 states have (on average 5.759082148441761) internal successors, (316738), 54998 states have internal predecessors, (316738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54999 states to 54999 states and 316738 transitions. [2021-06-30 11:51:39,265 INFO L78 Accepts]: Start accepts. Automaton has 54999 states and 316738 transitions. Word has length 26 [2021-06-30 11:51:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:39,265 INFO L482 AbstractCegarLoop]: Abstraction has 54999 states and 316738 transitions. [2021-06-30 11:51:39,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 54999 states and 316738 transitions. [2021-06-30 11:51:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:39,442 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:39,443 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:39,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-06-30 11:51:39,443 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:39,443 INFO L82 PathProgramCache]: Analyzing trace with hash 804802611, now seen corresponding path program 2 times [2021-06-30 11:51:39,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:39,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510311834] [2021-06-30 11:51:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:51:39,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:39,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510311834] [2021-06-30 11:51:39,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510311834] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:51:39,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:51:39,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:51:39,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442376566] [2021-06-30 11:51:39,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:51:39,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:39,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:51:39,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:39,472 INFO L87 Difference]: Start difference. First operand 54999 states and 316738 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:40,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:40,319 INFO L93 Difference]: Finished difference Result 56310 states and 322878 transitions. [2021-06-30 11:51:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:51:40,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:40,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:40,611 INFO L225 Difference]: With dead ends: 56310 [2021-06-30 11:51:40,612 INFO L226 Difference]: Without dead ends: 56286 [2021-06-30 11:51:40,612 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56286 states. [2021-06-30 11:51:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56286 to 55334. [2021-06-30 11:51:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55334 states, 55333 states have (on average 5.758878065530515) internal successors, (318656), 55333 states have internal predecessors, (318656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55334 states to 55334 states and 318656 transitions. [2021-06-30 11:51:42,859 INFO L78 Accepts]: Start accepts. Automaton has 55334 states and 318656 transitions. Word has length 26 [2021-06-30 11:51:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:42,859 INFO L482 AbstractCegarLoop]: Abstraction has 55334 states and 318656 transitions. [2021-06-30 11:51:42,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 55334 states and 318656 transitions. [2021-06-30 11:51:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:43,062 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:43,063 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:43,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-06-30 11:51:43,063 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:43,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:43,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1694722705, now seen corresponding path program 3 times [2021-06-30 11:51:43,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:43,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849079573] [2021-06-30 11:51:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:51:43,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:43,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849079573] [2021-06-30 11:51:43,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849079573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:43,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781217547] [2021-06-30 11:51:43,106 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 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 [2021-06-30 11:51:43,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:51:43,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:43,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:43,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:51:43,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781217547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:43,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:43,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:51:43,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619116956] [2021-06-30 11:51:43,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:51:43,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:51:43,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:43,528 INFO L87 Difference]: Start difference. First operand 55334 states and 318656 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:44,140 INFO L93 Difference]: Finished difference Result 57026 states and 326345 transitions. [2021-06-30 11:51:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:51:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:44,725 INFO L225 Difference]: With dead ends: 57026 [2021-06-30 11:51:44,725 INFO L226 Difference]: Without dead ends: 56926 [2021-06-30 11:51:44,725 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56926 states. [2021-06-30 11:51:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56926 to 54952. [2021-06-30 11:51:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54952 states, 54951 states have (on average 5.759021673854889) internal successors, (316464), 54951 states have internal predecessors, (316464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54952 states to 54952 states and 316464 transitions. [2021-06-30 11:51:46,781 INFO L78 Accepts]: Start accepts. Automaton has 54952 states and 316464 transitions. Word has length 26 [2021-06-30 11:51:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:46,781 INFO L482 AbstractCegarLoop]: Abstraction has 54952 states and 316464 transitions. [2021-06-30 11:51:46,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 54952 states and 316464 transitions. [2021-06-30 11:51:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:46,936 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:46,936 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:47,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-30 11:51:47,136 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -731651291, now seen corresponding path program 1 times [2021-06-30 11:51:47,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:47,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068093265] [2021-06-30 11:51:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:51:47,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:47,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068093265] [2021-06-30 11:51:47,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068093265] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:51:47,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:51:47,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:51:47,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057543769] [2021-06-30 11:51:47,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:51:47,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:47,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:51:47,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:47,165 INFO L87 Difference]: Start difference. First operand 54952 states and 316464 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:47,986 INFO L93 Difference]: Finished difference Result 56354 states and 322854 transitions. [2021-06-30 11:51:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:51:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:48,243 INFO L225 Difference]: With dead ends: 56354 [2021-06-30 11:51:48,243 INFO L226 Difference]: Without dead ends: 56299 [2021-06-30 11:51:48,243 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:48,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56299 states. [2021-06-30 11:51:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56299 to 55336. [2021-06-30 11:51:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55336 states, 55335 states have (on average 5.755453149001536) internal successors, (318478), 55335 states have internal predecessors, (318478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55336 states to 55336 states and 318478 transitions. [2021-06-30 11:51:50,582 INFO L78 Accepts]: Start accepts. Automaton has 55336 states and 318478 transitions. Word has length 26 [2021-06-30 11:51:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:50,582 INFO L482 AbstractCegarLoop]: Abstraction has 55336 states and 318478 transitions. [2021-06-30 11:51:50,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 55336 states and 318478 transitions. [2021-06-30 11:51:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:50,792 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:50,792 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:50,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-06-30 11:51:50,792 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1015222753, now seen corresponding path program 2 times [2021-06-30 11:51:50,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:50,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609543161] [2021-06-30 11:51:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:51:50,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609543161] [2021-06-30 11:51:50,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609543161] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:51:50,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:51:50,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:51:50,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025729990] [2021-06-30 11:51:50,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:51:50,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:50,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:51:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:50,824 INFO L87 Difference]: Start difference. First operand 55336 states and 318478 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:51,747 INFO L93 Difference]: Finished difference Result 56440 states and 323639 transitions. [2021-06-30 11:51:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:51:51,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:52,043 INFO L225 Difference]: With dead ends: 56440 [2021-06-30 11:51:52,044 INFO L226 Difference]: Without dead ends: 56407 [2021-06-30 11:51:52,044 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56407 states. [2021-06-30 11:51:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56407 to 55657. [2021-06-30 11:51:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55657 states, 55656 states have (on average 5.753503665373006) internal successors, (320217), 55656 states have internal predecessors, (320217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55657 states to 55657 states and 320217 transitions. [2021-06-30 11:51:53,975 INFO L78 Accepts]: Start accepts. Automaton has 55657 states and 320217 transitions. Word has length 26 [2021-06-30 11:51:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:53,975 INFO L482 AbstractCegarLoop]: Abstraction has 55657 states and 320217 transitions. [2021-06-30 11:51:53,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 55657 states and 320217 transitions. [2021-06-30 11:51:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:54,510 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:54,510 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:54,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-06-30 11:51:54,510 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:54,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:54,510 INFO L82 PathProgramCache]: Analyzing trace with hash -439632799, now seen corresponding path program 3 times [2021-06-30 11:51:54,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:54,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273872917] [2021-06-30 11:51:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:51:54,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:54,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273872917] [2021-06-30 11:51:54,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273872917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:54,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243899594] [2021-06-30 11:51:54,557 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 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 [2021-06-30 11:51:54,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:51:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:54,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:54,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:51:54,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243899594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:54,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:54,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:51:54,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444297767] [2021-06-30 11:51:54,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:51:54,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:54,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:51:54,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:54,616 INFO L87 Difference]: Start difference. First operand 55657 states and 320217 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:55,119 INFO L93 Difference]: Finished difference Result 57120 states and 326880 transitions. [2021-06-30 11:51:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:51:55,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:55,703 INFO L225 Difference]: With dead ends: 57120 [2021-06-30 11:51:55,703 INFO L226 Difference]: Without dead ends: 56945 [2021-06-30 11:51:55,703 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56945 states. [2021-06-30 11:51:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56945 to 55254. [2021-06-30 11:51:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55254 states, 55253 states have (on average 5.755506488335475) internal successors, (318009), 55253 states have internal predecessors, (318009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55254 states to 55254 states and 318009 transitions. [2021-06-30 11:51:57,817 INFO L78 Accepts]: Start accepts. Automaton has 55254 states and 318009 transitions. Word has length 26 [2021-06-30 11:51:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:57,817 INFO L482 AbstractCegarLoop]: Abstraction has 55254 states and 318009 transitions. [2021-06-30 11:51:57,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 55254 states and 318009 transitions. [2021-06-30 11:51:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:51:57,967 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:57,967 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:58,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:58,175 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:58,176 INFO L82 PathProgramCache]: Analyzing trace with hash 493834743, now seen corresponding path program 4 times [2021-06-30 11:51:58,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:58,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365293319] [2021-06-30 11:51:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:58,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:58,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365293319] [2021-06-30 11:51:58,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365293319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:58,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333371056] [2021-06-30 11:51:58,212 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 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 [2021-06-30 11:51:58,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:51:58,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:58,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:58,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333371056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:58,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:58,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:51:58,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144785249] [2021-06-30 11:51:58,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:51:58,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:58,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:51:58,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:58,286 INFO L87 Difference]: Start difference. First operand 55254 states and 318009 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:59,137 INFO L93 Difference]: Finished difference Result 57008 states and 326357 transitions. [2021-06-30 11:51:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:51:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:51:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:59,394 INFO L225 Difference]: With dead ends: 57008 [2021-06-30 11:51:59,394 INFO L226 Difference]: Without dead ends: 56937 [2021-06-30 11:51:59,394 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56937 states. [2021-06-30 11:52:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56937 to 55602. [2021-06-30 11:52:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55602 states, 55601 states have (on average 5.75833168468193) internal successors, (320169), 55601 states have internal predecessors, (320169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55602 states to 55602 states and 320169 transitions. [2021-06-30 11:52:01,663 INFO L78 Accepts]: Start accepts. Automaton has 55602 states and 320169 transitions. Word has length 26 [2021-06-30 11:52:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:01,663 INFO L482 AbstractCegarLoop]: Abstraction has 55602 states and 320169 transitions. [2021-06-30 11:52:01,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 55602 states and 320169 transitions. [2021-06-30 11:52:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:01,841 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:01,841 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:02,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:02,042 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:02,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1691248009, now seen corresponding path program 5 times [2021-06-30 11:52:02,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:02,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140237570] [2021-06-30 11:52:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:02,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:02,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140237570] [2021-06-30 11:52:02,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140237570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:02,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973461855] [2021-06-30 11:52:02,092 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 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 [2021-06-30 11:52:02,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:52:02,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:02,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:02,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:02,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973461855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:02,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:02,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:02,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252803392] [2021-06-30 11:52:02,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:02,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:02,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:02,160 INFO L87 Difference]: Start difference. First operand 55602 states and 320169 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:03,042 INFO L93 Difference]: Finished difference Result 57256 states and 328155 transitions. [2021-06-30 11:52:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:03,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:03,552 INFO L225 Difference]: With dead ends: 57256 [2021-06-30 11:52:03,552 INFO L226 Difference]: Without dead ends: 57201 [2021-06-30 11:52:03,552 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57201 states. [2021-06-30 11:52:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57201 to 56148. [2021-06-30 11:52:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56148 states, 56147 states have (on average 5.756816926995209) internal successors, (323228), 56147 states have internal predecessors, (323228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56148 states to 56148 states and 323228 transitions. [2021-06-30 11:52:06,056 INFO L78 Accepts]: Start accepts. Automaton has 56148 states and 323228 transitions. Word has length 26 [2021-06-30 11:52:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:06,056 INFO L482 AbstractCegarLoop]: Abstraction has 56148 states and 323228 transitions. [2021-06-30 11:52:06,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 56148 states and 323228 transitions. [2021-06-30 11:52:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:06,219 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:06,219 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:06,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:06,421 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:06,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash 104193971, now seen corresponding path program 6 times [2021-06-30 11:52:06,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:06,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934547338] [2021-06-30 11:52:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:06,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:06,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934547338] [2021-06-30 11:52:06,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934547338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:06,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666769212] [2021-06-30 11:52:06,463 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 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 [2021-06-30 11:52:06,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:52:06,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:06,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666769212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:06,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:06,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:06,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814225894] [2021-06-30 11:52:06,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:06,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:06,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:06,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:06,531 INFO L87 Difference]: Start difference. First operand 56148 states and 323228 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:07,419 INFO L93 Difference]: Finished difference Result 57815 states and 330811 transitions. [2021-06-30 11:52:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:07,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:07,711 INFO L225 Difference]: With dead ends: 57815 [2021-06-30 11:52:07,711 INFO L226 Difference]: Without dead ends: 57684 [2021-06-30 11:52:07,712 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57684 states. [2021-06-30 11:52:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57684 to 55209. [2021-06-30 11:52:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55209 states, 55208 states have (on average 5.7566294739892765) internal successors, (317812), 55208 states have internal predecessors, (317812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55209 states to 55209 states and 317812 transitions. [2021-06-30 11:52:10,057 INFO L78 Accepts]: Start accepts. Automaton has 55209 states and 317812 transitions. Word has length 26 [2021-06-30 11:52:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:10,057 INFO L482 AbstractCegarLoop]: Abstraction has 55209 states and 317812 transitions. [2021-06-30 11:52:10,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 55209 states and 317812 transitions. [2021-06-30 11:52:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:10,250 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:10,250 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:10,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-30 11:52:10,451 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash 410794227, now seen corresponding path program 7 times [2021-06-30 11:52:10,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:10,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190041092] [2021-06-30 11:52:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:52:10,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:10,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190041092] [2021-06-30 11:52:10,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190041092] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:52:10,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:52:10,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:52:10,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384913966] [2021-06-30 11:52:10,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:52:10,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:10,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:52:10,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:52:10,478 INFO L87 Difference]: Start difference. First operand 55209 states and 317812 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:11,336 INFO L93 Difference]: Finished difference Result 56414 states and 323451 transitions. [2021-06-30 11:52:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:52:11,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:11,640 INFO L225 Difference]: With dead ends: 56414 [2021-06-30 11:52:11,641 INFO L226 Difference]: Without dead ends: 56399 [2021-06-30 11:52:11,641 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:52:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56399 states. [2021-06-30 11:52:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56399 to 55575. [2021-06-30 11:52:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55575 states, 55574 states have (on average 5.754885378054486) internal successors, (319822), 55574 states have internal predecessors, (319822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55575 states to 55575 states and 319822 transitions. [2021-06-30 11:52:13,918 INFO L78 Accepts]: Start accepts. Automaton has 55575 states and 319822 transitions. Word has length 26 [2021-06-30 11:52:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:13,918 INFO L482 AbstractCegarLoop]: Abstraction has 55575 states and 319822 transitions. [2021-06-30 11:52:13,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 55575 states and 319822 transitions. [2021-06-30 11:52:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:14,180 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:14,180 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:14,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-06-30 11:52:14,180 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:14,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:14,180 INFO L82 PathProgramCache]: Analyzing trace with hash 395333431, now seen corresponding path program 8 times [2021-06-30 11:52:14,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:14,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074958155] [2021-06-30 11:52:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:52:14,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:14,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074958155] [2021-06-30 11:52:14,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074958155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:14,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009774935] [2021-06-30 11:52:14,225 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 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 [2021-06-30 11:52:14,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:52:14,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:14,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:14,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:52:14,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009774935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:14,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:14,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:14,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344484853] [2021-06-30 11:52:14,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:14,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:14,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:14,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:14,290 INFO L87 Difference]: Start difference. First operand 55575 states and 319822 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:15,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:15,133 INFO L93 Difference]: Finished difference Result 57333 states and 328140 transitions. [2021-06-30 11:52:15,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:15,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:15,434 INFO L225 Difference]: With dead ends: 57333 [2021-06-30 11:52:15,434 INFO L226 Difference]: Without dead ends: 57212 [2021-06-30 11:52:15,434 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57212 states. [2021-06-30 11:52:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57212 to 55559. [2021-06-30 11:52:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55559 states, 55558 states have (on average 5.758108643219698) internal successors, (319909), 55558 states have internal predecessors, (319909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55559 states to 55559 states and 319909 transitions. [2021-06-30 11:52:17,394 INFO L78 Accepts]: Start accepts. Automaton has 55559 states and 319909 transitions. Word has length 26 [2021-06-30 11:52:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:17,394 INFO L482 AbstractCegarLoop]: Abstraction has 55559 states and 319909 transitions. [2021-06-30 11:52:17,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 55559 states and 319909 transitions. [2021-06-30 11:52:17,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:17,951 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:17,951 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:18,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-30 11:52:18,165 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:18,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1182624905, now seen corresponding path program 9 times [2021-06-30 11:52:18,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:18,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203066107] [2021-06-30 11:52:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:18,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:18,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203066107] [2021-06-30 11:52:18,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203066107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:18,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120597507] [2021-06-30 11:52:18,201 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 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 [2021-06-30 11:52:18,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:52:18,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:18,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:18,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120597507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:18,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:18,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:18,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569781790] [2021-06-30 11:52:18,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:18,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:18,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:18,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:18,262 INFO L87 Difference]: Start difference. First operand 55559 states and 319909 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:18,804 INFO L93 Difference]: Finished difference Result 56816 states and 325853 transitions. [2021-06-30 11:52:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:19,417 INFO L225 Difference]: With dead ends: 56816 [2021-06-30 11:52:19,417 INFO L226 Difference]: Without dead ends: 56777 [2021-06-30 11:52:19,417 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56777 states. [2021-06-30 11:52:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56777 to 55880. [2021-06-30 11:52:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55880 states, 55879 states have (on average 5.75718964190483) internal successors, (321706), 55879 states have internal predecessors, (321706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55880 states to 55880 states and 321706 transitions. [2021-06-30 11:52:21,541 INFO L78 Accepts]: Start accepts. Automaton has 55880 states and 321706 transitions. Word has length 26 [2021-06-30 11:52:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:21,541 INFO L482 AbstractCegarLoop]: Abstraction has 55880 states and 321706 transitions. [2021-06-30 11:52:21,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 55880 states and 321706 transitions. [2021-06-30 11:52:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:21,696 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:21,696 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:21,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-30 11:52:21,896 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:21,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:21,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2081269427, now seen corresponding path program 10 times [2021-06-30 11:52:21,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:21,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039923163] [2021-06-30 11:52:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:21,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:21,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039923163] [2021-06-30 11:52:21,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039923163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:21,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718776110] [2021-06-30 11:52:21,940 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 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 [2021-06-30 11:52:21,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:52:21,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:21,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:21,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:22,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718776110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:22,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:22,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:22,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596954104] [2021-06-30 11:52:22,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:22,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:22,004 INFO L87 Difference]: Start difference. First operand 55880 states and 321706 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:22,891 INFO L93 Difference]: Finished difference Result 57436 states and 329132 transitions. [2021-06-30 11:52:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:22,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:23,428 INFO L225 Difference]: With dead ends: 57436 [2021-06-30 11:52:23,428 INFO L226 Difference]: Without dead ends: 57397 [2021-06-30 11:52:23,429 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57397 states. [2021-06-30 11:52:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57397 to 55987. [2021-06-30 11:52:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55987 states, 55986 states have (on average 5.75835030186118) internal successors, (322387), 55986 states have internal predecessors, (322387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55987 states to 55987 states and 322387 transitions. [2021-06-30 11:52:25,601 INFO L78 Accepts]: Start accepts. Automaton has 55987 states and 322387 transitions. Word has length 26 [2021-06-30 11:52:25,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:25,602 INFO L482 AbstractCegarLoop]: Abstraction has 55987 states and 322387 transitions. [2021-06-30 11:52:25,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 55987 states and 322387 transitions. [2021-06-30 11:52:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:25,763 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:25,763 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:25,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-30 11:52:25,964 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:25,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1487468723, now seen corresponding path program 11 times [2021-06-30 11:52:25,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:25,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199616238] [2021-06-30 11:52:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:26,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:26,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199616238] [2021-06-30 11:52:26,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199616238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:26,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094572564] [2021-06-30 11:52:26,006 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 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 [2021-06-30 11:52:26,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:52:26,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:26,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:26,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:26,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094572564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:26,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:26,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:26,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564658673] [2021-06-30 11:52:26,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:26,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:26,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:26,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:26,066 INFO L87 Difference]: Start difference. First operand 55987 states and 322387 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:27,141 INFO L93 Difference]: Finished difference Result 57845 states and 331397 transitions. [2021-06-30 11:52:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:27,600 INFO L225 Difference]: With dead ends: 57845 [2021-06-30 11:52:27,600 INFO L226 Difference]: Without dead ends: 57814 [2021-06-30 11:52:27,600 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57814 states. [2021-06-30 11:52:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57814 to 56487. [2021-06-30 11:52:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56487 states, 56486 states have (on average 5.7601529582551425) internal successors, (325368), 56486 states have internal predecessors, (325368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56487 states to 56487 states and 325368 transitions. [2021-06-30 11:52:29,732 INFO L78 Accepts]: Start accepts. Automaton has 56487 states and 325368 transitions. Word has length 26 [2021-06-30 11:52:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:29,733 INFO L482 AbstractCegarLoop]: Abstraction has 56487 states and 325368 transitions. [2021-06-30 11:52:29,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 56487 states and 325368 transitions. [2021-06-30 11:52:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:30,329 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:30,329 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:30,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:30,530 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1645604847, now seen corresponding path program 12 times [2021-06-30 11:52:30,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:30,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854548664] [2021-06-30 11:52:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:30,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:30,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854548664] [2021-06-30 11:52:30,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854548664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:30,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835342749] [2021-06-30 11:52:30,587 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 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 [2021-06-30 11:52:30,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:52:30,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:30,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:30,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:30,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835342749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:30,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:30,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:30,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406596053] [2021-06-30 11:52:30,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:30,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:30,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:30,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:30,659 INFO L87 Difference]: Start difference. First operand 56487 states and 325368 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:31,530 INFO L93 Difference]: Finished difference Result 58010 states and 332762 transitions. [2021-06-30 11:52:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:31,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:31,834 INFO L225 Difference]: With dead ends: 58010 [2021-06-30 11:52:31,834 INFO L226 Difference]: Without dead ends: 57995 [2021-06-30 11:52:31,834 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57995 states. [2021-06-30 11:52:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57995 to 56954. [2021-06-30 11:52:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56954 states, 56953 states have (on average 5.760785208856426) internal successors, (328094), 56953 states have internal predecessors, (328094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56954 states to 56954 states and 328094 transitions. [2021-06-30 11:52:33,902 INFO L78 Accepts]: Start accepts. Automaton has 56954 states and 328094 transitions. Word has length 26 [2021-06-30 11:52:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:33,903 INFO L482 AbstractCegarLoop]: Abstraction has 56954 states and 328094 transitions. [2021-06-30 11:52:33,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 56954 states and 328094 transitions. [2021-06-30 11:52:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:34,916 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:34,916 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:35,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-30 11:52:35,133 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash -327318221, now seen corresponding path program 13 times [2021-06-30 11:52:35,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:35,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932549635] [2021-06-30 11:52:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:35,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:35,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932549635] [2021-06-30 11:52:35,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932549635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:35,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420111321] [2021-06-30 11:52:35,186 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 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 [2021-06-30 11:52:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:35,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:35,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420111321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:35,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:35,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:35,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494173680] [2021-06-30 11:52:35,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:35,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:35,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:35,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:35,258 INFO L87 Difference]: Start difference. First operand 56954 states and 328094 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:36,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:36,439 INFO L93 Difference]: Finished difference Result 58784 states and 336754 transitions. [2021-06-30 11:52:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:36,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:36,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:36,756 INFO L225 Difference]: With dead ends: 58784 [2021-06-30 11:52:36,756 INFO L226 Difference]: Without dead ends: 58663 [2021-06-30 11:52:36,756 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:36,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58663 states. [2021-06-30 11:52:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58663 to 56767. [2021-06-30 11:52:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56767 states, 56766 states have (on average 5.761018919775922) internal successors, (327030), 56766 states have internal predecessors, (327030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56767 states to 56767 states and 327030 transitions. [2021-06-30 11:52:38,820 INFO L78 Accepts]: Start accepts. Automaton has 56767 states and 327030 transitions. Word has length 26 [2021-06-30 11:52:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:38,820 INFO L482 AbstractCegarLoop]: Abstraction has 56767 states and 327030 transitions. [2021-06-30 11:52:38,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 56767 states and 327030 transitions. [2021-06-30 11:52:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:38,992 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:38,992 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:39,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:39,192 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash -635013837, now seen corresponding path program 14 times [2021-06-30 11:52:39,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:39,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674797332] [2021-06-30 11:52:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:39,571 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-30 11:52:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:52:39,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:39,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674797332] [2021-06-30 11:52:39,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674797332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:39,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045947932] [2021-06-30 11:52:39,580 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 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 [2021-06-30 11:52:39,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:52:39,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:39,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:39,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:52:39,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045947932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:39,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:39,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:52:39,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314687145] [2021-06-30 11:52:39,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:52:39,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:39,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:52:39,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:52:39,640 INFO L87 Difference]: Start difference. First operand 56767 states and 327030 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:40,127 INFO L93 Difference]: Finished difference Result 58221 states and 333884 transitions. [2021-06-30 11:52:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:52:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:40,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:40,693 INFO L225 Difference]: With dead ends: 58221 [2021-06-30 11:52:40,693 INFO L226 Difference]: Without dead ends: 58198 [2021-06-30 11:52:40,693 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:52:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58198 states. [2021-06-30 11:52:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58198 to 57282. [2021-06-30 11:52:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57282 states, 57281 states have (on average 5.757773083570468) internal successors, (329811), 57281 states have internal predecessors, (329811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57282 states to 57282 states and 329811 transitions. [2021-06-30 11:52:42,754 INFO L78 Accepts]: Start accepts. Automaton has 57282 states and 329811 transitions. Word has length 26 [2021-06-30 11:52:42,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:42,754 INFO L482 AbstractCegarLoop]: Abstraction has 57282 states and 329811 transitions. [2021-06-30 11:52:42,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 57282 states and 329811 transitions. [2021-06-30 11:52:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:42,913 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:42,913 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:43,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:43,114 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash 295797303, now seen corresponding path program 15 times [2021-06-30 11:52:43,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:43,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025785761] [2021-06-30 11:52:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:43,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:43,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025785761] [2021-06-30 11:52:43,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025785761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:43,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152542567] [2021-06-30 11:52:43,178 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 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 [2021-06-30 11:52:43,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:52:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:43,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152542567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:43,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:43,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:43,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118594756] [2021-06-30 11:52:43,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:43,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:43,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:43,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:43,343 INFO L87 Difference]: Start difference. First operand 57282 states and 329811 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:44,362 INFO L93 Difference]: Finished difference Result 58952 states and 337677 transitions. [2021-06-30 11:52:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:44,635 INFO L225 Difference]: With dead ends: 58952 [2021-06-30 11:52:44,636 INFO L226 Difference]: Without dead ends: 58869 [2021-06-30 11:52:44,636 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58869 states. [2021-06-30 11:52:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58869 to 57224. [2021-06-30 11:52:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57224 states, 57223 states have (on average 5.759956660783251) internal successors, (329602), 57223 states have internal predecessors, (329602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57224 states to 57224 states and 329602 transitions. [2021-06-30 11:52:46,972 INFO L78 Accepts]: Start accepts. Automaton has 57224 states and 329602 transitions. Word has length 26 [2021-06-30 11:52:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:46,973 INFO L482 AbstractCegarLoop]: Abstraction has 57224 states and 329602 transitions. [2021-06-30 11:52:46,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 57224 states and 329602 transitions. [2021-06-30 11:52:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:47,130 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:47,130 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:47,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:47,331 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:47,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:47,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1761462647, now seen corresponding path program 16 times [2021-06-30 11:52:47,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:47,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961732464] [2021-06-30 11:52:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:47,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:47,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961732464] [2021-06-30 11:52:47,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961732464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:47,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025726616] [2021-06-30 11:52:47,376 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 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 [2021-06-30 11:52:47,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:52:47,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:47,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:47,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:47,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025726616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:47,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:47,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:47,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357499878] [2021-06-30 11:52:47,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:47,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:47,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:47,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:47,435 INFO L87 Difference]: Start difference. First operand 57224 states and 329602 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:48,310 INFO L93 Difference]: Finished difference Result 59775 states and 342107 transitions. [2021-06-30 11:52:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:48,597 INFO L225 Difference]: With dead ends: 59775 [2021-06-30 11:52:48,598 INFO L226 Difference]: Without dead ends: 59646 [2021-06-30 11:52:48,598 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59646 states. [2021-06-30 11:52:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59646 to 58205. [2021-06-30 11:52:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58205 states, 58204 states have (on average 5.757679884544018) internal successors, (335120), 58204 states have internal predecessors, (335120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58205 states to 58205 states and 335120 transitions. [2021-06-30 11:52:50,982 INFO L78 Accepts]: Start accepts. Automaton has 58205 states and 335120 transitions. Word has length 26 [2021-06-30 11:52:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:50,982 INFO L482 AbstractCegarLoop]: Abstraction has 58205 states and 335120 transitions. [2021-06-30 11:52:50,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 58205 states and 335120 transitions. [2021-06-30 11:52:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:51,168 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:51,168 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:51,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:51,368 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:51,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1822133449, now seen corresponding path program 17 times [2021-06-30 11:52:51,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:51,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469588614] [2021-06-30 11:52:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:51,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:51,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469588614] [2021-06-30 11:52:51,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469588614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:51,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790458324] [2021-06-30 11:52:51,411 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 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 [2021-06-30 11:52:51,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:52:51,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:51,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790458324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:51,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:51,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:51,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878547618] [2021-06-30 11:52:51,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:51,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:51,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:51,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:51,471 INFO L87 Difference]: Start difference. First operand 58205 states and 335120 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:52,596 INFO L93 Difference]: Finished difference Result 60439 states and 346030 transitions. [2021-06-30 11:52:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:53,056 INFO L225 Difference]: With dead ends: 60439 [2021-06-30 11:52:53,056 INFO L226 Difference]: Without dead ends: 60321 [2021-06-30 11:52:53,056 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60321 states. [2021-06-30 11:52:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60321 to 58492. [2021-06-30 11:52:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58492 states, 58491 states have (on average 5.757193414371442) internal successors, (336744), 58491 states have internal predecessors, (336744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58492 states to 58492 states and 336744 transitions. [2021-06-30 11:52:55,655 INFO L78 Accepts]: Start accepts. Automaton has 58492 states and 336744 transitions. Word has length 26 [2021-06-30 11:52:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:55,655 INFO L482 AbstractCegarLoop]: Abstraction has 58492 states and 336744 transitions. [2021-06-30 11:52:55,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 58492 states and 336744 transitions. [2021-06-30 11:52:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:52:55,851 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:55,851 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:56,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-30 11:52:56,051 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:56,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1540477125, now seen corresponding path program 18 times [2021-06-30 11:52:56,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:56,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173164885] [2021-06-30 11:52:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:56,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:56,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173164885] [2021-06-30 11:52:56,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173164885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:56,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972862856] [2021-06-30 11:52:56,101 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 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 [2021-06-30 11:52:56,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:52:56,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:56,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:56,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:56,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972862856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:56,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:56,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:56,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110838104] [2021-06-30 11:52:56,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:56,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:56,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:56,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:56,161 INFO L87 Difference]: Start difference. First operand 58492 states and 336744 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:57,048 INFO L93 Difference]: Finished difference Result 60347 states and 345726 transitions. [2021-06-30 11:52:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:52:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:57,365 INFO L225 Difference]: With dead ends: 60347 [2021-06-30 11:52:57,365 INFO L226 Difference]: Without dead ends: 60292 [2021-06-30 11:52:57,365 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60292 states. [2021-06-30 11:52:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60292 to 58660. [2021-06-30 11:52:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58660 states, 58659 states have (on average 5.757581956732982) internal successors, (337734), 58659 states have internal predecessors, (337734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58660 states to 58660 states and 337734 transitions. [2021-06-30 11:52:59,846 INFO L78 Accepts]: Start accepts. Automaton has 58660 states and 337734 transitions. Word has length 26 [2021-06-30 11:52:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:59,846 INFO L482 AbstractCegarLoop]: Abstraction has 58660 states and 337734 transitions. [2021-06-30 11:52:59,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 58660 states and 337734 transitions. [2021-06-30 11:53:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:00,041 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:00,041 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:00,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-30 11:53:00,242 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:00,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:00,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1723417207, now seen corresponding path program 19 times [2021-06-30 11:53:00,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:00,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662635512] [2021-06-30 11:53:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:00,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:00,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662635512] [2021-06-30 11:53:00,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662635512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:00,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029348993] [2021-06-30 11:53:00,285 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 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 [2021-06-30 11:53:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:00,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:00,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:00,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029348993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:00,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:00,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:00,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376682242] [2021-06-30 11:53:00,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:00,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:00,345 INFO L87 Difference]: Start difference. First operand 58660 states and 337734 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:01,260 INFO L93 Difference]: Finished difference Result 60878 states and 348821 transitions. [2021-06-30 11:53:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:01,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:01,586 INFO L225 Difference]: With dead ends: 60878 [2021-06-30 11:53:01,586 INFO L226 Difference]: Without dead ends: 60857 [2021-06-30 11:53:01,586 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60857 states. [2021-06-30 11:53:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60857 to 59428. [2021-06-30 11:53:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59428 states, 59427 states have (on average 5.7602436602890945) internal successors, (342314), 59427 states have internal predecessors, (342314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59428 states to 59428 states and 342314 transitions. [2021-06-30 11:53:04,611 INFO L78 Accepts]: Start accepts. Automaton has 59428 states and 342314 transitions. Word has length 26 [2021-06-30 11:53:04,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:04,611 INFO L482 AbstractCegarLoop]: Abstraction has 59428 states and 342314 transitions. [2021-06-30 11:53:04,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 59428 states and 342314 transitions. [2021-06-30 11:53:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:04,951 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:04,951 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:05,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-30 11:53:05,169 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:05,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1129616503, now seen corresponding path program 20 times [2021-06-30 11:53:05,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:05,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500113462] [2021-06-30 11:53:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:05,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:05,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500113462] [2021-06-30 11:53:05,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500113462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:05,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955773651] [2021-06-30 11:53:05,222 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 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 [2021-06-30 11:53:05,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:53:05,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:05,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:05,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:05,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955773651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:05,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:05,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:05,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267253710] [2021-06-30 11:53:05,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:05,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:05,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:05,295 INFO L87 Difference]: Start difference. First operand 59428 states and 342314 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:06,773 INFO L93 Difference]: Finished difference Result 61741 states and 353909 transitions. [2021-06-30 11:53:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:07,144 INFO L225 Difference]: With dead ends: 61741 [2021-06-30 11:53:07,144 INFO L226 Difference]: Without dead ends: 61638 [2021-06-30 11:53:07,144 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61638 states. [2021-06-30 11:53:08,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61638 to 60180. [2021-06-30 11:53:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60180 states, 60179 states have (on average 5.762907326476014) internal successors, (346806), 60179 states have internal predecessors, (346806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60180 states to 60180 states and 346806 transitions. [2021-06-30 11:53:09,788 INFO L78 Accepts]: Start accepts. Automaton has 60180 states and 346806 transitions. Word has length 26 [2021-06-30 11:53:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:09,788 INFO L482 AbstractCegarLoop]: Abstraction has 60180 states and 346806 transitions. [2021-06-30 11:53:09,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 60180 states and 346806 transitions. [2021-06-30 11:53:09,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:09,993 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:09,993 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:10,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-30 11:53:10,194 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1716492873, now seen corresponding path program 4 times [2021-06-30 11:53:10,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:10,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383207567] [2021-06-30 11:53:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:10,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383207567] [2021-06-30 11:53:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383207567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545216615] [2021-06-30 11:53:10,241 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 [2021-06-30 11:53:10,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:53:10,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:10,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:10,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545216615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:10,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:10,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:10,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171759675] [2021-06-30 11:53:10,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:10,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:10,301 INFO L87 Difference]: Start difference. First operand 60180 states and 346806 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:11,239 INFO L93 Difference]: Finished difference Result 61587 states and 353427 transitions. [2021-06-30 11:53:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:11,575 INFO L225 Difference]: With dead ends: 61587 [2021-06-30 11:53:11,576 INFO L226 Difference]: Without dead ends: 61487 [2021-06-30 11:53:11,576 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61487 states. [2021-06-30 11:53:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61487 to 60452. [2021-06-30 11:53:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60452 states, 60451 states have (on average 5.764387685894361) internal successors, (348463), 60451 states have internal predecessors, (348463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60452 states to 60452 states and 348463 transitions. [2021-06-30 11:53:14,170 INFO L78 Accepts]: Start accepts. Automaton has 60452 states and 348463 transitions. Word has length 26 [2021-06-30 11:53:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:14,170 INFO L482 AbstractCegarLoop]: Abstraction has 60452 states and 348463 transitions. [2021-06-30 11:53:14,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 60452 states and 348463 transitions. [2021-06-30 11:53:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:14,378 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:14,378 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:14,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:14,578 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:14,578 INFO L82 PathProgramCache]: Analyzing trace with hash -831600379, now seen corresponding path program 5 times [2021-06-30 11:53:14,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:14,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580006432] [2021-06-30 11:53:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:14,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:14,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580006432] [2021-06-30 11:53:14,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580006432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:14,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693265775] [2021-06-30 11:53:14,613 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 [2021-06-30 11:53:14,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:53:14,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:14,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693265775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:14,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:14,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:14,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635620972] [2021-06-30 11:53:14,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:14,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:14,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:14,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:14,677 INFO L87 Difference]: Start difference. First operand 60452 states and 348463 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:15,614 INFO L93 Difference]: Finished difference Result 61806 states and 354904 transitions. [2021-06-30 11:53:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:15,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:15,914 INFO L225 Difference]: With dead ends: 61806 [2021-06-30 11:53:15,914 INFO L226 Difference]: Without dead ends: 61725 [2021-06-30 11:53:15,914 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61725 states. [2021-06-30 11:53:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61725 to 60962. [2021-06-30 11:53:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60962 states, 60961 states have (on average 5.760108922097735) internal successors, (351142), 60961 states have internal predecessors, (351142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60962 states to 60962 states and 351142 transitions. [2021-06-30 11:53:18,731 INFO L78 Accepts]: Start accepts. Automaton has 60962 states and 351142 transitions. Word has length 26 [2021-06-30 11:53:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:18,731 INFO L482 AbstractCegarLoop]: Abstraction has 60962 states and 351142 transitions. [2021-06-30 11:53:18,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 60962 states and 351142 transitions. [2021-06-30 11:53:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:19,002 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:19,002 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:19,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:19,226 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:19,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:19,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2008511365, now seen corresponding path program 6 times [2021-06-30 11:53:19,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:19,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170362456] [2021-06-30 11:53:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:19,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:19,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170362456] [2021-06-30 11:53:19,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170362456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:19,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196176226] [2021-06-30 11:53:19,276 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 [2021-06-30 11:53:19,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:53:19,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:19,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:19,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:19,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196176226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:19,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:19,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:19,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566070705] [2021-06-30 11:53:19,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:19,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:19,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:19,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:19,355 INFO L87 Difference]: Start difference. First operand 60962 states and 351142 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:20,364 INFO L93 Difference]: Finished difference Result 62319 states and 357224 transitions. [2021-06-30 11:53:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:20,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:20,950 INFO L225 Difference]: With dead ends: 62319 [2021-06-30 11:53:20,950 INFO L226 Difference]: Without dead ends: 62102 [2021-06-30 11:53:20,950 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62102 states. [2021-06-30 11:53:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62102 to 60130. [2021-06-30 11:53:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60130 states, 60129 states have (on average 5.763774551381197) internal successors, (346570), 60129 states have internal predecessors, (346570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60130 states to 60130 states and 346570 transitions. [2021-06-30 11:53:23,650 INFO L78 Accepts]: Start accepts. Automaton has 60130 states and 346570 transitions. Word has length 26 [2021-06-30 11:53:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:23,650 INFO L482 AbstractCegarLoop]: Abstraction has 60130 states and 346570 transitions. [2021-06-30 11:53:23,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 60130 states and 346570 transitions. [2021-06-30 11:53:23,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:23,859 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:23,859 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:24,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:24,060 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1985182331, now seen corresponding path program 7 times [2021-06-30 11:53:24,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:24,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303176400] [2021-06-30 11:53:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:53:24,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303176400] [2021-06-30 11:53:24,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303176400] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:53:24,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:53:24,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:53:24,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631606995] [2021-06-30 11:53:24,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:53:24,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:24,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:53:24,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:53:24,089 INFO L87 Difference]: Start difference. First operand 60130 states and 346570 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:25,038 INFO L93 Difference]: Finished difference Result 61098 states and 351017 transitions. [2021-06-30 11:53:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:53:25,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:25,353 INFO L225 Difference]: With dead ends: 61098 [2021-06-30 11:53:25,353 INFO L226 Difference]: Without dead ends: 61083 [2021-06-30 11:53:25,353 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:53:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61083 states. [2021-06-30 11:53:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61083 to 60415. [2021-06-30 11:53:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60415 states, 60414 states have (on average 5.761429469990399) internal successors, (348071), 60414 states have internal predecessors, (348071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60415 states to 60415 states and 348071 transitions. [2021-06-30 11:53:27,891 INFO L78 Accepts]: Start accepts. Automaton has 60415 states and 348071 transitions. Word has length 26 [2021-06-30 11:53:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:27,891 INFO L482 AbstractCegarLoop]: Abstraction has 60415 states and 348071 transitions. [2021-06-30 11:53:27,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60415 states and 348071 transitions. [2021-06-30 11:53:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:28,087 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:28,087 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:28,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-06-30 11:53:28,087 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:28,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:28,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2000643127, now seen corresponding path program 8 times [2021-06-30 11:53:28,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:28,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537120417] [2021-06-30 11:53:28,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:53:28,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537120417] [2021-06-30 11:53:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537120417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164777161] [2021-06-30 11:53:28,122 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 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 [2021-06-30 11:53:28,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:53:28,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:28,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:53:28,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164777161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:28,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:28,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:28,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430243133] [2021-06-30 11:53:28,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:28,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:28,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:28,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:28,182 INFO L87 Difference]: Start difference. First operand 60415 states and 348071 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:29,080 INFO L93 Difference]: Finished difference Result 61814 states and 354478 transitions. [2021-06-30 11:53:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:29,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:29,374 INFO L225 Difference]: With dead ends: 61814 [2021-06-30 11:53:29,374 INFO L226 Difference]: Without dead ends: 61693 [2021-06-30 11:53:29,374 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61693 states. [2021-06-30 11:53:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61693 to 60418. [2021-06-30 11:53:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60418 states, 60417 states have (on average 5.763642683350713) internal successors, (348222), 60417 states have internal predecessors, (348222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60418 states to 60418 states and 348222 transitions. [2021-06-30 11:53:31,784 INFO L78 Accepts]: Start accepts. Automaton has 60418 states and 348222 transitions. Word has length 26 [2021-06-30 11:53:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:31,784 INFO L482 AbstractCegarLoop]: Abstraction has 60418 states and 348222 transitions. [2021-06-30 11:53:31,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 60418 states and 348222 transitions. [2021-06-30 11:53:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:32,007 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:32,007 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:32,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:32,207 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:32,208 INFO L82 PathProgramCache]: Analyzing trace with hash -57335867, now seen corresponding path program 9 times [2021-06-30 11:53:32,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:32,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105171604] [2021-06-30 11:53:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:32,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:32,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105171604] [2021-06-30 11:53:32,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105171604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:32,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660967099] [2021-06-30 11:53:32,244 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 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 [2021-06-30 11:53:32,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:53:32,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:32,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:32,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:32,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660967099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:32,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:32,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:32,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717257124] [2021-06-30 11:53:32,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:32,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:32,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:32,304 INFO L87 Difference]: Start difference. First operand 60418 states and 348222 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:33,249 INFO L93 Difference]: Finished difference Result 61434 states and 352976 transitions. [2021-06-30 11:53:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:33,554 INFO L225 Difference]: With dead ends: 61434 [2021-06-30 11:53:33,554 INFO L226 Difference]: Without dead ends: 61377 [2021-06-30 11:53:33,554 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61377 states. [2021-06-30 11:53:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61377 to 60717. [2021-06-30 11:53:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60717 states, 60716 states have (on average 5.761051452664866) internal successors, (349788), 60716 states have internal predecessors, (349788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60717 states to 60717 states and 349788 transitions. [2021-06-30 11:53:35,990 INFO L78 Accepts]: Start accepts. Automaton has 60717 states and 349788 transitions. Word has length 26 [2021-06-30 11:53:35,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:35,990 INFO L482 AbstractCegarLoop]: Abstraction has 60717 states and 349788 transitions. [2021-06-30 11:53:35,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 60717 states and 349788 transitions. [2021-06-30 11:53:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:36,182 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:36,182 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:36,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:36,383 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:36,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:36,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2030258935, now seen corresponding path program 10 times [2021-06-30 11:53:36,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:36,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791037154] [2021-06-30 11:53:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:36,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791037154] [2021-06-30 11:53:36,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791037154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494797644] [2021-06-30 11:53:36,425 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 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 [2021-06-30 11:53:36,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:53:36,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:36,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:36,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494797644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:36,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:36,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:36,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443896802] [2021-06-30 11:53:36,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:36,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:36,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:36,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:36,483 INFO L87 Difference]: Start difference. First operand 60717 states and 349788 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:37,437 INFO L93 Difference]: Finished difference Result 61922 states and 355509 transitions. [2021-06-30 11:53:37,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:37,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:37,753 INFO L225 Difference]: With dead ends: 61922 [2021-06-30 11:53:37,753 INFO L226 Difference]: Without dead ends: 61865 [2021-06-30 11:53:37,753 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61865 states. [2021-06-30 11:53:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61865 to 60795. [2021-06-30 11:53:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60795 states, 60794 states have (on average 5.761785702536434) internal successors, (350282), 60794 states have internal predecessors, (350282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60795 states to 60795 states and 350282 transitions. [2021-06-30 11:53:40,608 INFO L78 Accepts]: Start accepts. Automaton has 60795 states and 350282 transitions. Word has length 26 [2021-06-30 11:53:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:40,608 INFO L482 AbstractCegarLoop]: Abstraction has 60795 states and 350282 transitions. [2021-06-30 11:53:40,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:40,608 INFO L276 IsEmpty]: Start isEmpty. Operand 60795 states and 350282 transitions. [2021-06-30 11:53:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:40,846 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:40,846 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:41,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:41,061 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash 486365385, now seen corresponding path program 11 times [2021-06-30 11:53:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:41,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292447960] [2021-06-30 11:53:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:41,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:41,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292447960] [2021-06-30 11:53:41,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292447960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:41,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976578240] [2021-06-30 11:53:41,117 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 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 [2021-06-30 11:53:41,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:53:41,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:41,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:41,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976578240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:41,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:41,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:41,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535092618] [2021-06-30 11:53:41,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:41,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:41,191 INFO L87 Difference]: Start difference. First operand 60795 states and 350282 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:42,275 INFO L93 Difference]: Finished difference Result 62258 states and 357288 transitions. [2021-06-30 11:53:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:42,832 INFO L225 Difference]: With dead ends: 62258 [2021-06-30 11:53:42,833 INFO L226 Difference]: Without dead ends: 62227 [2021-06-30 11:53:42,833 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62227 states. [2021-06-30 11:53:44,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62227 to 61225. [2021-06-30 11:53:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61225 states, 61224 states have (on average 5.761841761400758) internal successors, (352763), 61224 states have internal predecessors, (352763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61225 states to 61225 states and 352763 transitions. [2021-06-30 11:53:45,529 INFO L78 Accepts]: Start accepts. Automaton has 61225 states and 352763 transitions. Word has length 26 [2021-06-30 11:53:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:45,529 INFO L482 AbstractCegarLoop]: Abstraction has 61225 states and 352763 transitions. [2021-06-30 11:53:45,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 61225 states and 352763 transitions. [2021-06-30 11:53:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:45,723 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:45,723 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:45,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:45,923 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:45,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1586227189, now seen corresponding path program 12 times [2021-06-30 11:53:45,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:45,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642486929] [2021-06-30 11:53:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:45,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:45,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642486929] [2021-06-30 11:53:45,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642486929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:45,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177160363] [2021-06-30 11:53:45,958 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 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 [2021-06-30 11:53:45,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:53:45,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:45,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:46,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177160363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:46,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:46,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:46,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013466162] [2021-06-30 11:53:46,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:46,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:46,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:46,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:46,019 INFO L87 Difference]: Start difference. First operand 61225 states and 352763 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:46,959 INFO L93 Difference]: Finished difference Result 62476 states and 358751 transitions. [2021-06-30 11:53:46,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:46,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:47,271 INFO L225 Difference]: With dead ends: 62476 [2021-06-30 11:53:47,271 INFO L226 Difference]: Without dead ends: 62461 [2021-06-30 11:53:47,271 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62461 states. [2021-06-30 11:53:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62461 to 61597. [2021-06-30 11:53:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61597 states, 61596 states have (on average 5.762159880511722) internal successors, (354926), 61596 states have internal predecessors, (354926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61597 states to 61597 states and 354926 transitions. [2021-06-30 11:53:49,849 INFO L78 Accepts]: Start accepts. Automaton has 61597 states and 354926 transitions. Word has length 26 [2021-06-30 11:53:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:49,849 INFO L482 AbstractCegarLoop]: Abstraction has 61597 states and 354926 transitions. [2021-06-30 11:53:49,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 61597 states and 354926 transitions. [2021-06-30 11:53:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:50,028 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:50,028 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:50,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:50,228 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2065511865, now seen corresponding path program 13 times [2021-06-30 11:53:50,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:50,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457483554] [2021-06-30 11:53:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:50,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:50,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457483554] [2021-06-30 11:53:50,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457483554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:50,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195171203] [2021-06-30 11:53:50,270 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 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 [2021-06-30 11:53:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:50,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:50,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:50,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195171203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:50,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:50,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:50,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589808276] [2021-06-30 11:53:50,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:50,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:50,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:50,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:50,329 INFO L87 Difference]: Start difference. First operand 61597 states and 354926 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:51,315 INFO L93 Difference]: Finished difference Result 63094 states and 361852 transitions. [2021-06-30 11:53:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:51,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:51,623 INFO L225 Difference]: With dead ends: 63094 [2021-06-30 11:53:51,623 INFO L226 Difference]: Without dead ends: 62973 [2021-06-30 11:53:51,623 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62973 states. [2021-06-30 11:53:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62973 to 61470. [2021-06-30 11:53:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61470 states, 61469 states have (on average 5.761538336397209) internal successors, (354156), 61469 states have internal predecessors, (354156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61470 states to 61470 states and 354156 transitions. [2021-06-30 11:53:54,152 INFO L78 Accepts]: Start accepts. Automaton has 61470 states and 354156 transitions. Word has length 26 [2021-06-30 11:53:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:54,152 INFO L482 AbstractCegarLoop]: Abstraction has 61470 states and 354156 transitions. [2021-06-30 11:53:54,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 61470 states and 354156 transitions. [2021-06-30 11:53:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:54,329 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:54,329 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:54,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-30 11:53:54,529 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash -17033177, now seen corresponding path program 14 times [2021-06-30 11:53:54,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:54,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872637098] [2021-06-30 11:53:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:53:54,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:54,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872637098] [2021-06-30 11:53:54,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872637098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:54,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919183954] [2021-06-30 11:53:54,557 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 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 [2021-06-30 11:53:54,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:53:54,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:54,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:53:54,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919183954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:54,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:54,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:53:54,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114795728] [2021-06-30 11:53:54,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:53:54,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:54,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:53:54,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:53:54,621 INFO L87 Difference]: Start difference. First operand 61470 states and 354156 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:55,497 INFO L93 Difference]: Finished difference Result 62646 states and 359618 transitions. [2021-06-30 11:53:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:53:55,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:56,010 INFO L225 Difference]: With dead ends: 62646 [2021-06-30 11:53:56,011 INFO L226 Difference]: Without dead ends: 62610 [2021-06-30 11:53:56,011 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:53:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62610 states. [2021-06-30 11:53:57,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62610 to 61882. [2021-06-30 11:53:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61882 states, 61881 states have (on average 5.757922464084291) internal successors, (356306), 61881 states have internal predecessors, (356306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61882 states to 61882 states and 356306 transitions. [2021-06-30 11:53:58,212 INFO L78 Accepts]: Start accepts. Automaton has 61882 states and 356306 transitions. Word has length 26 [2021-06-30 11:53:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:58,212 INFO L482 AbstractCegarLoop]: Abstraction has 61882 states and 356306 transitions. [2021-06-30 11:53:58,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 61882 states and 356306 transitions. [2021-06-30 11:53:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:53:58,386 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:58,386 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:58,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:58,589 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:58,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:58,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1651252987, now seen corresponding path program 15 times [2021-06-30 11:53:58,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:58,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744189454] [2021-06-30 11:53:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:58,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:58,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744189454] [2021-06-30 11:53:58,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744189454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:58,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641676482] [2021-06-30 11:53:58,626 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 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 [2021-06-30 11:53:59,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:53:59,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:59,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:59,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641676482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:59,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:59,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027426801] [2021-06-30 11:53:59,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:59,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:59,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:59,074 INFO L87 Difference]: Start difference. First operand 61882 states and 356306 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:59,638 INFO L93 Difference]: Finished difference Result 63303 states and 362867 transitions. [2021-06-30 11:53:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:59,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:53:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:00,206 INFO L225 Difference]: With dead ends: 63303 [2021-06-30 11:54:00,206 INFO L226 Difference]: Without dead ends: 63175 [2021-06-30 11:54:00,207 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:54:00,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63175 states. [2021-06-30 11:54:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63175 to 61828. [2021-06-30 11:54:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61828 states, 61827 states have (on average 5.7600401119252105) internal successors, (356126), 61827 states have internal predecessors, (356126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61828 states to 61828 states and 356126 transitions. [2021-06-30 11:54:02,463 INFO L78 Accepts]: Start accepts. Automaton has 61828 states and 356126 transitions. Word has length 26 [2021-06-30 11:54:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:02,463 INFO L482 AbstractCegarLoop]: Abstraction has 61828 states and 356126 transitions. [2021-06-30 11:54:02,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 61828 states and 356126 transitions. [2021-06-30 11:54:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:54:03,063 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:03,064 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:03,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:03,265 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1048106141, now seen corresponding path program 16 times [2021-06-30 11:54:03,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:03,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552827348] [2021-06-30 11:54:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:54:03,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:03,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552827348] [2021-06-30 11:54:03,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552827348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:03,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883205144] [2021-06-30 11:54:03,300 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 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 [2021-06-30 11:54:03,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:54:03,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:54:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:03,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:54:03,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883205144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:03,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:03,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:54:03,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845269491] [2021-06-30 11:54:03,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:54:03,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:03,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:54:03,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:54:03,359 INFO L87 Difference]: Start difference. First operand 61828 states and 356126 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:04,241 INFO L93 Difference]: Finished difference Result 63857 states and 365785 transitions. [2021-06-30 11:54:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:54:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:54:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:04,577 INFO L225 Difference]: With dead ends: 63857 [2021-06-30 11:54:04,577 INFO L226 Difference]: Without dead ends: 63715 [2021-06-30 11:54:04,577 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:54:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63715 states. [2021-06-30 11:54:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63715 to 62681. [2021-06-30 11:54:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62681 states, 62680 states have (on average 5.752887683471601) internal successors, (360591), 62680 states have internal predecessors, (360591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62681 states to 62681 states and 360591 transitions. [2021-06-30 11:54:07,300 INFO L78 Accepts]: Start accepts. Automaton has 62681 states and 360591 transitions. Word has length 26 [2021-06-30 11:54:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:07,300 INFO L482 AbstractCegarLoop]: Abstraction has 62681 states and 360591 transitions. [2021-06-30 11:54:07,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 62681 states and 360591 transitions. [2021-06-30 11:54:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:54:07,520 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:07,520 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:07,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:07,721 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2069750683, now seen corresponding path program 17 times [2021-06-30 11:54:07,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:07,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216186193] [2021-06-30 11:54:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:07,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:07,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216186193] [2021-06-30 11:54:07,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216186193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:07,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896295332] [2021-06-30 11:54:07,764 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 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 [2021-06-30 11:54:07,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:54:07,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:54:07,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:07,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:07,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896295332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:07,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:07,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:07,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164955530] [2021-06-30 11:54:07,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:07,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:07,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:07,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:07,824 INFO L87 Difference]: Start difference. First operand 62681 states and 360591 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:08,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:08,785 INFO L93 Difference]: Finished difference Result 64464 states and 369165 transitions. [2021-06-30 11:54:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:54:08,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:54:08,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:09,119 INFO L225 Difference]: With dead ends: 64464 [2021-06-30 11:54:09,119 INFO L226 Difference]: Without dead ends: 64300 [2021-06-30 11:54:09,119 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64300 states. [2021-06-30 11:54:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64300 to 62915. [2021-06-30 11:54:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62915 states, 62914 states have (on average 5.7508344724544616) internal successors, (361808), 62914 states have internal predecessors, (361808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62915 states to 62915 states and 361808 transitions. [2021-06-30 11:54:11,730 INFO L78 Accepts]: Start accepts. Automaton has 62915 states and 361808 transitions. Word has length 26 [2021-06-30 11:54:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:11,730 INFO L482 AbstractCegarLoop]: Abstraction has 62915 states and 361808 transitions. [2021-06-30 11:54:11,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 62915 states and 361808 transitions. [2021-06-30 11:54:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:54:11,934 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:11,934 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:12,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-30 11:54:12,134 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1644150657, now seen corresponding path program 18 times [2021-06-30 11:54:12,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:12,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769380139] [2021-06-30 11:54:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:12,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:12,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769380139] [2021-06-30 11:54:12,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769380139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:12,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190944424] [2021-06-30 11:54:12,179 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 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 [2021-06-30 11:54:12,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:54:12,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:54:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:12,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190944424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:12,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:12,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:12,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072904121] [2021-06-30 11:54:12,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:12,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:12,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:12,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:12,239 INFO L87 Difference]: Start difference. First operand 62915 states and 361808 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)