/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/concurrent_increment.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 20:30:41,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 20:30:41,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 20:30:41,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 20:30:41,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 20:30:41,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 20:30:41,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 20:30:41,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 20:30:41,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 20:30:41,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 20:30:41,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 20:30:41,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 20:30:41,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 20:30:41,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 20:30:41,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 20:30:41,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 20:30:41,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 20:30:41,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 20:30:41,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 20:30:41,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 20:30:41,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 20:30:41,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 20:30:41,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 20:30:41,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 20:30:41,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 20:30:41,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 20:30:41,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 20:30:41,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 20:30:41,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 20:30:41,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 20:30:41,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 20:30:41,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 20:30:41,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 20:30:41,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 20:30:41,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 20:30:41,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 20:30:41,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 20:30:41,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 20:30:41,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 20:30:41,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 20:30:41,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 20:30:41,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 20:30:41,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 20:30:41,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 20:30:41,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 20:30:41,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 20:30:41,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 20:30:41,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 20:30:41,963 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 20:30:41,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 20:30:41,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 20:30:41,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 20:30:41,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 20:30:41,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 20:30:41,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 20:30:41,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 20:30:41,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 20:30:41,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 20:30:41,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 20:30:41,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 20:30:41,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 20:30:41,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 20:30:41,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 20:30:41,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 20:30:41,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 20:30:41,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 20:30:41,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 20:30:41,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 20:30:41,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 20:30:41,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 20:30:41,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 20:30:41,966 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 20:30:41,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 20:30:41,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 20:30:42,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 20:30:42,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 20:30:42,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 20:30:42,318 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 20:30:42,321 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 20:30:42,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/concurrent_increment.bpl [2021-06-05 20:30:42,345 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/concurrent_increment.bpl' [2021-06-05 20:30:42,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 20:30:42,363 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 20:30:42,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 20:30:42,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 20:30:42,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 20:30:42,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... [2021-06-05 20:30:42,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... [2021-06-05 20:30:42,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 20:30:42,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 20:30:42,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 20:30:42,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 20:30:42,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... [2021-06-05 20:30:42,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... [2021-06-05 20:30:42,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... [2021-06-05 20:30:42,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... [2021-06-05 20:30:42,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... [2021-06-05 20:30:42,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... [2021-06-05 20:30:42,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... [2021-06-05 20:30:42,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 20:30:42,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 20:30:42,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 20:30:42,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 20:30:42,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 20:30:42,478 INFO L124 BoogieDeclarations]: Specification and implementation of procedure dec given in one single declaration [2021-06-05 20:30:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure dec [2021-06-05 20:30:42,478 INFO L138 BoogieDeclarations]: Found implementation of procedure dec [2021-06-05 20:30:42,478 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 20:30:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 20:30:42,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 20:30:42,479 INFO L124 BoogieDeclarations]: Specification and implementation of procedure inc given in one single declaration [2021-06-05 20:30:42,479 INFO L130 BoogieDeclarations]: Found specification of procedure inc [2021-06-05 20:30:42,479 INFO L138 BoogieDeclarations]: Found implementation of procedure inc [2021-06-05 20:30:42,479 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 20:30:42,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 20:30:42,623 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 20:30:42,625 INFO L202 PluginConnector]: Adding new model concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:30:42 BoogieIcfgContainer [2021-06-05 20:30:42,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 20:30:42,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 20:30:42,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 20:30:42,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 20:30:42,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:30:42" (1/2) ... [2021-06-05 20:30:42,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4ea96d and model type concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 08:30:42, skipping insertion in model container [2021-06-05 20:30:42,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:30:42" (2/2) ... [2021-06-05 20:30:42,631 INFO L111 eAbstractionObserver]: Analyzing ICFG concurrent_increment.bpl [2021-06-05 20:30:42,636 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 20:30:42,636 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 20:30:42,636 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 20:30:42,637 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 20:30:42,654 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,654 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,654 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,655 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,655 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,655 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,655 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,656 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,656 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,656 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,656 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,657 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,657 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,657 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,657 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,657 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,658 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,658 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,658 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,658 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,660 WARN L313 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,663 WARN L313 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:30:42,667 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 20:30:42,702 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 20:30:42,718 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:30:42,718 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 20:30:42,718 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:30:42,718 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:30:42,718 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:30:42,718 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:30:42,718 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:30:42,719 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 20:30:42,726 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-06-05 20:30:42,756 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 20:30:42,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:42,763 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:42,764 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2123029350, now seen corresponding path program 1 times [2021-06-05 20:30:42,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:42,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28173529] [2021-06-05 20:30:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:42,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:42,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28173529] [2021-06-05 20:30:42,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28173529] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:42,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:42,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-05 20:30:42,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443621359] [2021-06-05 20:30:42,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:30:42,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:30:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:30:42,941 INFO L87 Difference]: Start difference. First operand has 54 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:42,966 INFO L93 Difference]: Finished difference Result 88 states and 170 transitions. [2021-06-05 20:30:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:30:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 20:30:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:42,977 INFO L225 Difference]: With dead ends: 88 [2021-06-05 20:30:42,978 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 20:30:42,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:30:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 20:30:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2021-06-05 20:30:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-06-05 20:30:43,030 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 12 [2021-06-05 20:30:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:43,030 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-06-05 20:30:43,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-06-05 20:30:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:43,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:43,032 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:43,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 20:30:43,032 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:43,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:43,037 INFO L82 PathProgramCache]: Analyzing trace with hash -516255331, now seen corresponding path program 1 times [2021-06-05 20:30:43,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:43,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759848806] [2021-06-05 20:30:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:43,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:43,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759848806] [2021-06-05 20:30:43,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759848806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566094975] [2021-06-05 20:30:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:43,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 20:30:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:43,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566094975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:43,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:43,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 20:30:43,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244340147] [2021-06-05 20:30:43,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:30:43,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:43,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:30:43,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:30:43,307 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-06-05 20:30:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:43,452 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2021-06-05 20:30:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:30:43,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 15 [2021-06-05 20:30:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:43,455 INFO L225 Difference]: With dead ends: 108 [2021-06-05 20:30:43,456 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 20:30:43,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 20:30:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2021-06-05 20:30:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 131 transitions. [2021-06-05 20:30:43,465 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 131 transitions. Word has length 15 [2021-06-05 20:30:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:43,465 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 131 transitions. [2021-06-05 20:30:43,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-06-05 20:30:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 131 transitions. [2021-06-05 20:30:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:43,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:43,471 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:43,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 20:30:43,694 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:43,694 INFO L82 PathProgramCache]: Analyzing trace with hash -405889681, now seen corresponding path program 1 times [2021-06-05 20:30:43,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:43,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296438569] [2021-06-05 20:30:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:43,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296438569] [2021-06-05 20:30:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296438569] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:43,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:43,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:43,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153821237] [2021-06-05 20:30:43,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:43,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:43,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:43,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:43,742 INFO L87 Difference]: Start difference. First operand 66 states and 131 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:43,819 INFO L93 Difference]: Finished difference Result 115 states and 220 transitions. [2021-06-05 20:30:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:30:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:43,824 INFO L225 Difference]: With dead ends: 115 [2021-06-05 20:30:43,824 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 20:30:43,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:30:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 20:30:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2021-06-05 20:30:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 129 transitions. [2021-06-05 20:30:43,842 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 129 transitions. Word has length 15 [2021-06-05 20:30:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:43,842 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 129 transitions. [2021-06-05 20:30:43,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 129 transitions. [2021-06-05 20:30:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:43,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:43,843 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:43,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 20:30:43,844 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1486069887, now seen corresponding path program 2 times [2021-06-05 20:30:43,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:43,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517211364] [2021-06-05 20:30:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:43,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:43,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517211364] [2021-06-05 20:30:43,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517211364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:43,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929475192] [2021-06-05 20:30:43,915 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) [2021-06-05 20:30:43,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:43,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 20:30:43,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:44,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929475192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:44,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:44,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 20:30:44,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577616634] [2021-06-05 20:30:44,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 20:30:44,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 20:30:44,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:30:44,059 INFO L87 Difference]: Start difference. First operand 66 states and 129 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:44,161 INFO L93 Difference]: Finished difference Result 159 states and 301 transitions. [2021-06-05 20:30:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 20:30:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:44,163 INFO L225 Difference]: With dead ends: 159 [2021-06-05 20:30:44,163 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 20:30:44,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 20:30:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 20:30:44,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 70. [2021-06-05 20:30:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.028985507246377) internal successors, (140), 69 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2021-06-05 20:30:44,181 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 15 [2021-06-05 20:30:44,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:44,182 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2021-06-05 20:30:44,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2021-06-05 20:30:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:44,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:44,183 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:44,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:44,402 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2113545343, now seen corresponding path program 2 times [2021-06-05 20:30:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:44,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622567313] [2021-06-05 20:30:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:44,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:44,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622567313] [2021-06-05 20:30:44,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622567313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:44,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:44,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:44,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423212566] [2021-06-05 20:30:44,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:44,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:44,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:44,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:44,427 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:44,488 INFO L93 Difference]: Finished difference Result 109 states and 210 transitions. [2021-06-05 20:30:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:30:44,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:44,489 INFO L225 Difference]: With dead ends: 109 [2021-06-05 20:30:44,489 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 20:30:44,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:30:44,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 20:30:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-06-05 20:30:44,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 158 transitions. [2021-06-05 20:30:44,493 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 158 transitions. Word has length 15 [2021-06-05 20:30:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:44,493 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 158 transitions. [2021-06-05 20:30:44,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 158 transitions. [2021-06-05 20:30:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:44,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:44,495 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:44,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 20:30:44,495 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:44,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:44,495 INFO L82 PathProgramCache]: Analyzing trace with hash -482544261, now seen corresponding path program 3 times [2021-06-05 20:30:44,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:44,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038750513] [2021-06-05 20:30:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:44,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:44,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038750513] [2021-06-05 20:30:44,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038750513] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:44,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:44,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:44,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768040695] [2021-06-05 20:30:44,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:44,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:44,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:44,520 INFO L87 Difference]: Start difference. First operand 79 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:44,582 INFO L93 Difference]: Finished difference Result 99 states and 196 transitions. [2021-06-05 20:30:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:30:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:44,583 INFO L225 Difference]: With dead ends: 99 [2021-06-05 20:30:44,584 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 20:30:44,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:30:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 20:30:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2021-06-05 20:30:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 139 transitions. [2021-06-05 20:30:44,591 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 139 transitions. Word has length 15 [2021-06-05 20:30:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:44,591 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 139 transitions. [2021-06-05 20:30:44,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 139 transitions. [2021-06-05 20:30:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:44,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:44,592 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:44,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 20:30:44,592 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash -130817509, now seen corresponding path program 3 times [2021-06-05 20:30:44,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:44,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446758362] [2021-06-05 20:30:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:44,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:44,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446758362] [2021-06-05 20:30:44,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446758362] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:44,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:44,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:44,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348819652] [2021-06-05 20:30:44,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:44,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:44,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:44,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:44,643 INFO L87 Difference]: Start difference. First operand 70 states and 139 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:44,714 INFO L93 Difference]: Finished difference Result 130 states and 249 transitions. [2021-06-05 20:30:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:30:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:44,716 INFO L225 Difference]: With dead ends: 130 [2021-06-05 20:30:44,717 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 20:30:44,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:30:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 20:30:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 70. [2021-06-05 20:30:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0) internal successors, (138), 69 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 138 transitions. [2021-06-05 20:30:44,720 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 138 transitions. Word has length 15 [2021-06-05 20:30:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:44,720 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 138 transitions. [2021-06-05 20:30:44,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 138 transitions. [2021-06-05 20:30:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:44,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:44,724 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:44,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 20:30:44,725 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:44,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1915878813, now seen corresponding path program 4 times [2021-06-05 20:30:44,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:44,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192657213] [2021-06-05 20:30:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:44,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:44,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192657213] [2021-06-05 20:30:44,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192657213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:44,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282241279] [2021-06-05 20:30:44,765 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:44,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:30:44,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 20:30:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:44,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282241279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:44,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:44,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 20:30:44,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708737892] [2021-06-05 20:30:44,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:30:44,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:44,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:30:44,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:30:44,857 INFO L87 Difference]: Start difference. First operand 70 states and 138 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-06-05 20:30:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:44,927 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2021-06-05 20:30:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:30:44,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 15 [2021-06-05 20:30:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:44,928 INFO L225 Difference]: With dead ends: 107 [2021-06-05 20:30:44,928 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 20:30:44,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 20:30:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2021-06-05 20:30:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 135 transitions. [2021-06-05 20:30:44,933 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 135 transitions. Word has length 15 [2021-06-05 20:30:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:44,933 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 135 transitions. [2021-06-05 20:30:44,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-06-05 20:30:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 135 transitions. [2021-06-05 20:30:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:44,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:44,934 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:45,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:45,149 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:45,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1475226567, now seen corresponding path program 4 times [2021-06-05 20:30:45,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:45,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918793227] [2021-06-05 20:30:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:45,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:45,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918793227] [2021-06-05 20:30:45,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918793227] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:45,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:45,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:45,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237440349] [2021-06-05 20:30:45,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:45,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:45,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:45,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:45,171 INFO L87 Difference]: Start difference. First operand 68 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:45,218 INFO L93 Difference]: Finished difference Result 110 states and 212 transitions. [2021-06-05 20:30:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:30:45,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:45,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:45,219 INFO L225 Difference]: With dead ends: 110 [2021-06-05 20:30:45,219 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 20:30:45,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:30:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 20:30:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 68. [2021-06-05 20:30:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 134 transitions. [2021-06-05 20:30:45,222 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 134 transitions. Word has length 15 [2021-06-05 20:30:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:45,222 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 134 transitions. [2021-06-05 20:30:45,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 134 transitions. [2021-06-05 20:30:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:45,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:45,223 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:45,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 20:30:45,223 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:45,224 INFO L82 PathProgramCache]: Analyzing trace with hash 335223295, now seen corresponding path program 5 times [2021-06-05 20:30:45,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:45,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445673481] [2021-06-05 20:30:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:45,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:45,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445673481] [2021-06-05 20:30:45,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445673481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:45,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303543094] [2021-06-05 20:30:45,271 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:45,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:45,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:45,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 20:30:45,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:45,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303543094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:45,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:45,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 20:30:45,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831207589] [2021-06-05 20:30:45,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 20:30:45,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 20:30:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:30:45,360 INFO L87 Difference]: Start difference. First operand 68 states and 134 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:45,446 INFO L93 Difference]: Finished difference Result 127 states and 242 transitions. [2021-06-05 20:30:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 20:30:45,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:45,447 INFO L225 Difference]: With dead ends: 127 [2021-06-05 20:30:45,447 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 20:30:45,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 20:30:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 20:30:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 68. [2021-06-05 20:30:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 134 transitions. [2021-06-05 20:30:45,450 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 134 transitions. Word has length 15 [2021-06-05 20:30:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:45,450 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 134 transitions. [2021-06-05 20:30:45,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 134 transitions. [2021-06-05 20:30:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:45,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:45,451 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:45,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:45,666 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash -360128771, now seen corresponding path program 5 times [2021-06-05 20:30:45,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:45,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048997314] [2021-06-05 20:30:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:45,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:45,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048997314] [2021-06-05 20:30:45,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048997314] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:45,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:45,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:45,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739937358] [2021-06-05 20:30:45,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:45,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:45,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:45,692 INFO L87 Difference]: Start difference. First operand 68 states and 134 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:45,771 INFO L93 Difference]: Finished difference Result 129 states and 246 transitions. [2021-06-05 20:30:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:30:45,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:45,773 INFO L225 Difference]: With dead ends: 129 [2021-06-05 20:30:45,773 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 20:30:45,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:30:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 20:30:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2021-06-05 20:30:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-06-05 20:30:45,776 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 15 [2021-06-05 20:30:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:45,776 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-06-05 20:30:45,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-06-05 20:30:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:45,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:45,777 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:45,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 20:30:45,777 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1338748921, now seen corresponding path program 6 times [2021-06-05 20:30:45,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:45,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650693535] [2021-06-05 20:30:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:45,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:45,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650693535] [2021-06-05 20:30:45,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650693535] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:45,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:45,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422394706] [2021-06-05 20:30:45,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:45,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:45,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:45,798 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:45,869 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 20:30:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:30:45,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:45,870 INFO L225 Difference]: With dead ends: 113 [2021-06-05 20:30:45,870 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 20:30:45,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:30:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 20:30:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 68. [2021-06-05 20:30:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 133 transitions. [2021-06-05 20:30:45,873 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 133 transitions. Word has length 15 [2021-06-05 20:30:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:45,873 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 133 transitions. [2021-06-05 20:30:45,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 133 transitions. [2021-06-05 20:30:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 20:30:45,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:45,874 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:45,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 20:30:45,874 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1690475673, now seen corresponding path program 6 times [2021-06-05 20:30:45,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:45,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830221991] [2021-06-05 20:30:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:45,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:45,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830221991] [2021-06-05 20:30:45,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830221991] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:30:45,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:30:45,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 20:30:45,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660104552] [2021-06-05 20:30:45,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:45,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:45,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:45,894 INFO L87 Difference]: Start difference. First operand 68 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:45,965 INFO L93 Difference]: Finished difference Result 88 states and 169 transitions. [2021-06-05 20:30:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:30:45,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 20:30:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:45,967 INFO L225 Difference]: With dead ends: 88 [2021-06-05 20:30:45,967 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 20:30:45,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:30:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 20:30:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-06-05 20:30:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-06-05 20:30:45,969 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 15 [2021-06-05 20:30:45,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:45,970 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-06-05 20:30:45,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:45,970 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-06-05 20:30:45,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:45,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:45,970 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:45,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 20:30:45,971 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash -411603572, now seen corresponding path program 1 times [2021-06-05 20:30:45,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:45,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499050651] [2021-06-05 20:30:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:46,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:46,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499050651] [2021-06-05 20:30:46,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499050651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:46,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757967446] [2021-06-05 20:30:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 20:30:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:46,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 20:30:46,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:46,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757967446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:46,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:46,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-06-05 20:30:46,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896187484] [2021-06-05 20:30:46,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 20:30:46,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:46,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 20:30:46,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 20:30:46,092 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:46,103 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-06-05 20:30:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 20:30:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:46,104 INFO L225 Difference]: With dead ends: 152 [2021-06-05 20:30:46,104 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 20:30:46,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 20:30:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 20:30:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2021-06-05 20:30:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.066666666666667) internal successors, (248), 120 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 248 transitions. [2021-06-05 20:30:46,108 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 248 transitions. Word has length 18 [2021-06-05 20:30:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:46,108 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 248 transitions. [2021-06-05 20:30:46,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 248 transitions. [2021-06-05 20:30:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 20:30:46,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:46,109 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:46,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 20:30:46,317 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:46,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1490772634, now seen corresponding path program 2 times [2021-06-05 20:30:46,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:46,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133362902] [2021-06-05 20:30:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:30:46,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:46,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133362902] [2021-06-05 20:30:46,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133362902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:46,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579585667] [2021-06-05 20:30:46,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:46,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:46,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:46,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 20:30:46,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:30:46,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579585667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:46,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:46,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-06-05 20:30:46,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033710710] [2021-06-05 20:30:46,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 20:30:46,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 20:30:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 20:30:46,439 INFO L87 Difference]: Start difference. First operand 121 states and 248 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:46,457 INFO L93 Difference]: Finished difference Result 195 states and 393 transitions. [2021-06-05 20:30:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 20:30:46,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 20:30:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:46,460 INFO L225 Difference]: With dead ends: 195 [2021-06-05 20:30:46,460 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 20:30:46,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 20:30:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 20:30:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2021-06-05 20:30:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1225806451612903) internal successors, (329), 155 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 329 transitions. [2021-06-05 20:30:46,469 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 329 transitions. Word has length 18 [2021-06-05 20:30:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:46,469 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 329 transitions. [2021-06-05 20:30:46,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 329 transitions. [2021-06-05 20:30:46,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:46,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:46,471 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:46,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:46,685 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1164561487, now seen corresponding path program 3 times [2021-06-05 20:30:46,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:46,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353277099] [2021-06-05 20:30:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:46,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:46,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353277099] [2021-06-05 20:30:46,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353277099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:46,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358223688] [2021-06-05 20:30:46,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:46,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:30:46,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:46,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:46,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358223688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:46,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:46,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 20:30:46,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761654870] [2021-06-05 20:30:46,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 20:30:46,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:46,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 20:30:46,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:30:46,814 INFO L87 Difference]: Start difference. First operand 156 states and 329 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:46,935 INFO L93 Difference]: Finished difference Result 303 states and 631 transitions. [2021-06-05 20:30:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:30:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:46,944 INFO L225 Difference]: With dead ends: 303 [2021-06-05 20:30:46,944 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 20:30:46,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:30:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 20:30:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 170. [2021-06-05 20:30:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1420118343195265) internal successors, (362), 169 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 362 transitions. [2021-06-05 20:30:46,957 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 362 transitions. Word has length 21 [2021-06-05 20:30:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:46,959 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 362 transitions. [2021-06-05 20:30:46,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 362 transitions. [2021-06-05 20:30:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:46,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:46,962 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:47,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 20:30:47,185 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash -877308099, now seen corresponding path program 4 times [2021-06-05 20:30:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:47,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715553234] [2021-06-05 20:30:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:47,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:47,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715553234] [2021-06-05 20:30:47,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715553234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:47,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767125625] [2021-06-05 20:30:47,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:47,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:30:47,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:47,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:47,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:47,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767125625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:47,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:47,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 20:30:47,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581698378] [2021-06-05 20:30:47,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 20:30:47,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:47,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 20:30:47,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:30:47,358 INFO L87 Difference]: Start difference. First operand 170 states and 362 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:47,460 INFO L93 Difference]: Finished difference Result 313 states and 651 transitions. [2021-06-05 20:30:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:30:47,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:47,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:47,462 INFO L225 Difference]: With dead ends: 313 [2021-06-05 20:30:47,462 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 20:30:47,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:30:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 20:30:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 170. [2021-06-05 20:30:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1301775147928996) internal successors, (360), 169 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 360 transitions. [2021-06-05 20:30:47,468 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 360 transitions. Word has length 21 [2021-06-05 20:30:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:47,468 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 360 transitions. [2021-06-05 20:30:47,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 360 transitions. [2021-06-05 20:30:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:47,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:47,469 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:47,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 20:30:47,694 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash 505169433, now seen corresponding path program 5 times [2021-06-05 20:30:47,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:47,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507753546] [2021-06-05 20:30:47,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:47,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:47,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507753546] [2021-06-05 20:30:47,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507753546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:47,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441166302] [2021-06-05 20:30:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:47,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 20:30:47,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:47,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:47,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:47,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441166302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:47,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:47,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:47,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949767481] [2021-06-05 20:30:47,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:47,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:47,848 INFO L87 Difference]: Start difference. First operand 170 states and 360 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:48,114 INFO L93 Difference]: Finished difference Result 650 states and 1332 transitions. [2021-06-05 20:30:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:30:48,115 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:48,118 INFO L225 Difference]: With dead ends: 650 [2021-06-05 20:30:48,118 INFO L226 Difference]: Without dead ends: 650 [2021-06-05 20:30:48,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:30:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-05 20:30:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 289. [2021-06-05 20:30:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.267361111111111) internal successors, (653), 288 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 653 transitions. [2021-06-05 20:30:48,129 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 653 transitions. Word has length 21 [2021-06-05 20:30:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:48,129 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 653 transitions. [2021-06-05 20:30:48,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 653 transitions. [2021-06-05 20:30:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:48,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:48,130 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:48,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 20:30:48,345 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:48,345 INFO L82 PathProgramCache]: Analyzing trace with hash -190182633, now seen corresponding path program 6 times [2021-06-05 20:30:48,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:48,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279490618] [2021-06-05 20:30:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:48,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:48,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279490618] [2021-06-05 20:30:48,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279490618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:48,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035724442] [2021-06-05 20:30:48,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:48,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 20:30:48,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:48,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035724442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:48,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:48,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:48,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998424251] [2021-06-05 20:30:48,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:48,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:48,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:48,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:48,512 INFO L87 Difference]: Start difference. First operand 289 states and 653 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:48,736 INFO L93 Difference]: Finished difference Result 660 states and 1419 transitions. [2021-06-05 20:30:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:30:48,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:48,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:48,739 INFO L225 Difference]: With dead ends: 660 [2021-06-05 20:30:48,739 INFO L226 Difference]: Without dead ends: 656 [2021-06-05 20:30:48,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:30:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-05 20:30:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 371. [2021-06-05 20:30:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.3135135135135134) internal successors, (856), 370 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 856 transitions. [2021-06-05 20:30:48,751 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 856 transitions. Word has length 21 [2021-06-05 20:30:48,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:48,751 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 856 transitions. [2021-06-05 20:30:48,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 856 transitions. [2021-06-05 20:30:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:48,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:48,752 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:48,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:48,969 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1508695059, now seen corresponding path program 7 times [2021-06-05 20:30:48,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:48,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592772313] [2021-06-05 20:30:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:48,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:48,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592772313] [2021-06-05 20:30:48,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592772313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:48,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863029830] [2021-06-05 20:30:48,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:49,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:49,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863029830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:49,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:49,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:49,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424595585] [2021-06-05 20:30:49,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:49,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:49,108 INFO L87 Difference]: Start difference. First operand 371 states and 856 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:49,428 INFO L93 Difference]: Finished difference Result 716 states and 1527 transitions. [2021-06-05 20:30:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:30:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:49,432 INFO L225 Difference]: With dead ends: 716 [2021-06-05 20:30:49,432 INFO L226 Difference]: Without dead ends: 716 [2021-06-05 20:30:49,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:30:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-05 20:30:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 371. [2021-06-05 20:30:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.308108108108108) internal successors, (854), 370 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 854 transitions. [2021-06-05 20:30:49,445 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 854 transitions. Word has length 21 [2021-06-05 20:30:49,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:49,445 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 854 transitions. [2021-06-05 20:30:49,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 854 transitions. [2021-06-05 20:30:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:49,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:49,446 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:49,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:49,661 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1860421811, now seen corresponding path program 8 times [2021-06-05 20:30:49,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:49,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977884088] [2021-06-05 20:30:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:49,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:49,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977884088] [2021-06-05 20:30:49,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977884088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:49,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435181794] [2021-06-05 20:30:49,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:49,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:49,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435181794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:49,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:49,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:49,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210432961] [2021-06-05 20:30:49,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:49,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:49,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:49,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:49,788 INFO L87 Difference]: Start difference. First operand 371 states and 854 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:50,010 INFO L93 Difference]: Finished difference Result 740 states and 1552 transitions. [2021-06-05 20:30:50,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:30:50,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:50,013 INFO L225 Difference]: With dead ends: 740 [2021-06-05 20:30:50,014 INFO L226 Difference]: Without dead ends: 734 [2021-06-05 20:30:50,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:30:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-06-05 20:30:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 374. [2021-06-05 20:30:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.292225201072386) internal successors, (855), 373 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 855 transitions. [2021-06-05 20:30:50,025 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 855 transitions. Word has length 21 [2021-06-05 20:30:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:50,025 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 855 transitions. [2021-06-05 20:30:50,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 855 transitions. [2021-06-05 20:30:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:50,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:50,026 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:50,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:50,241 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1354075545, now seen corresponding path program 9 times [2021-06-05 20:30:50,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:50,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344031058] [2021-06-05 20:30:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:50,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:50,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344031058] [2021-06-05 20:30:50,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344031058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:50,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681957583] [2021-06-05 20:30:50,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:50,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 20:30:50,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:50,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:50,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:50,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681957583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:50,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:50,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:50,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634870781] [2021-06-05 20:30:50,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:50,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:50,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:50,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:50,371 INFO L87 Difference]: Start difference. First operand 374 states and 855 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:50,537 INFO L93 Difference]: Finished difference Result 623 states and 1353 transitions. [2021-06-05 20:30:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 20:30:50,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:50,539 INFO L225 Difference]: With dead ends: 623 [2021-06-05 20:30:50,539 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 20:30:50,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:30:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 20:30:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 378. [2021-06-05 20:30:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.2811671087533156) internal successors, (860), 377 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 860 transitions. [2021-06-05 20:30:50,550 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 860 transitions. Word has length 21 [2021-06-05 20:30:50,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:50,550 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 860 transitions. [2021-06-05 20:30:50,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 860 transitions. [2021-06-05 20:30:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:50,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:50,551 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:50,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 20:30:50,774 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:50,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:50,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1025588517, now seen corresponding path program 10 times [2021-06-05 20:30:50,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:50,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851951113] [2021-06-05 20:30:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:50,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:50,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851951113] [2021-06-05 20:30:50,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851951113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:50,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828689149] [2021-06-05 20:30:50,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:50,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:30:50,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:50,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828689149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:50,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:50,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 20:30:50,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302955484] [2021-06-05 20:30:50,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 20:30:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:50,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 20:30:50,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 20:30:50,944 INFO L87 Difference]: Start difference. First operand 378 states and 860 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:51,191 INFO L93 Difference]: Finished difference Result 832 states and 1809 transitions. [2021-06-05 20:30:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 20:30:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:51,195 INFO L225 Difference]: With dead ends: 832 [2021-06-05 20:30:51,195 INFO L226 Difference]: Without dead ends: 814 [2021-06-05 20:30:51,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:30:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-06-05 20:30:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 497. [2021-06-05 20:30:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.3245967741935485) internal successors, (1153), 496 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1153 transitions. [2021-06-05 20:30:51,208 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1153 transitions. Word has length 21 [2021-06-05 20:30:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:51,209 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1153 transitions. [2021-06-05 20:30:51,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1153 transitions. [2021-06-05 20:30:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:51,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:51,210 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:51,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:51,433 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:51,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:51,433 INFO L82 PathProgramCache]: Analyzing trace with hash -402887771, now seen corresponding path program 11 times [2021-06-05 20:30:51,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:51,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751659320] [2021-06-05 20:30:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:51,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:51,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751659320] [2021-06-05 20:30:51,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751659320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:51,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731345271] [2021-06-05 20:30:51,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:51,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 20:30:51,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:51,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:51,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731345271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:51,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:51,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 20:30:51,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109571005] [2021-06-05 20:30:51,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:51,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:51,556 INFO L87 Difference]: Start difference. First operand 497 states and 1153 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:51,807 INFO L93 Difference]: Finished difference Result 983 states and 2161 transitions. [2021-06-05 20:30:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:30:51,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:51,811 INFO L225 Difference]: With dead ends: 983 [2021-06-05 20:30:51,811 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 20:30:51,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:30:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 20:30:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 647. [2021-06-05 20:30:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.3328173374613) internal successors, (1507), 646 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1507 transitions. [2021-06-05 20:30:51,831 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1507 transitions. Word has length 21 [2021-06-05 20:30:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:51,832 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1507 transitions. [2021-06-05 20:30:51,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1507 transitions. [2021-06-05 20:30:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:51,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:51,833 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:52,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 20:30:52,056 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:52,057 INFO L82 PathProgramCache]: Analyzing trace with hash -605089831, now seen corresponding path program 12 times [2021-06-05 20:30:52,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:52,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297337591] [2021-06-05 20:30:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:52,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:52,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297337591] [2021-06-05 20:30:52,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297337591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:52,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547170569] [2021-06-05 20:30:52,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:52,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:30:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:52,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:52,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547170569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:52,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:52,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 20:30:52,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002351011] [2021-06-05 20:30:52,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 20:30:52,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 20:30:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:30:52,182 INFO L87 Difference]: Start difference. First operand 647 states and 1507 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:52,315 INFO L93 Difference]: Finished difference Result 814 states and 1851 transitions. [2021-06-05 20:30:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:30:52,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:52,318 INFO L225 Difference]: With dead ends: 814 [2021-06-05 20:30:52,318 INFO L226 Difference]: Without dead ends: 814 [2021-06-05 20:30:52,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:30:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-06-05 20:30:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 661. [2021-06-05 20:30:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.3333333333333335) internal successors, (1540), 660 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1540 transitions. [2021-06-05 20:30:52,332 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1540 transitions. Word has length 21 [2021-06-05 20:30:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:52,333 INFO L482 AbstractCegarLoop]: Abstraction has 661 states and 1540 transitions. [2021-06-05 20:30:52,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1540 transitions. [2021-06-05 20:30:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:52,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:52,334 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:52,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:52,553 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:52,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1195271101, now seen corresponding path program 13 times [2021-06-05 20:30:52,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:52,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529303249] [2021-06-05 20:30:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:52,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:52,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529303249] [2021-06-05 20:30:52,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529303249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:52,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313896333] [2021-06-05 20:30:52,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:52,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:52,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:52,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313896333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:52,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:52,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 20:30:52,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940684785] [2021-06-05 20:30:52,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 20:30:52,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:52,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 20:30:52,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:30:52,659 INFO L87 Difference]: Start difference. First operand 661 states and 1540 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:52,737 INFO L93 Difference]: Finished difference Result 885 states and 2014 transitions. [2021-06-05 20:30:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 20:30:52,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:52,740 INFO L225 Difference]: With dead ends: 885 [2021-06-05 20:30:52,740 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 20:30:52,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:30:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 20:30:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 661. [2021-06-05 20:30:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.331818181818182) internal successors, (1539), 660 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1539 transitions. [2021-06-05 20:30:52,754 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1539 transitions. Word has length 21 [2021-06-05 20:30:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:52,755 INFO L482 AbstractCegarLoop]: Abstraction has 661 states and 1539 transitions. [2021-06-05 20:30:52,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1539 transitions. [2021-06-05 20:30:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:52,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:52,756 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:52,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 20:30:52,979 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash 107806775, now seen corresponding path program 14 times [2021-06-05 20:30:52,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:52,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905444506] [2021-06-05 20:30:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:53,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:53,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905444506] [2021-06-05 20:30:53,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905444506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:53,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646567716] [2021-06-05 20:30:53,019 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 [2021-06-05 20:30:53,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:53,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:53,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:53,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646567716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:53,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:53,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:53,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697097328] [2021-06-05 20:30:53,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:53,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:53,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:53,105 INFO L87 Difference]: Start difference. First operand 661 states and 1539 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:53,258 INFO L93 Difference]: Finished difference Result 869 states and 1945 transitions. [2021-06-05 20:30:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 20:30:53,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:53,261 INFO L225 Difference]: With dead ends: 869 [2021-06-05 20:30:53,261 INFO L226 Difference]: Without dead ends: 869 [2021-06-05 20:30:53,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:30:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-06-05 20:30:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 721. [2021-06-05 20:30:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.3375) internal successors, (1683), 720 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1683 transitions. [2021-06-05 20:30:53,277 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1683 transitions. Word has length 21 [2021-06-05 20:30:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:53,277 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 1683 transitions. [2021-06-05 20:30:53,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1683 transitions. [2021-06-05 20:30:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:53,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:53,278 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:53,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 20:30:53,502 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:53,502 INFO L82 PathProgramCache]: Analyzing trace with hash -498322823, now seen corresponding path program 15 times [2021-06-05 20:30:53,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:53,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421305502] [2021-06-05 20:30:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:53,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:53,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421305502] [2021-06-05 20:30:53,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421305502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:53,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674215614] [2021-06-05 20:30:53,542 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 [2021-06-05 20:30:53,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:30:53,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:53,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:53,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:53,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674215614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:53,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:53,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:53,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644877442] [2021-06-05 20:30:53,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:53,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:53,634 INFO L87 Difference]: Start difference. First operand 721 states and 1683 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:53,818 INFO L93 Difference]: Finished difference Result 1013 states and 2270 transitions. [2021-06-05 20:30:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:30:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:53,822 INFO L225 Difference]: With dead ends: 1013 [2021-06-05 20:30:53,822 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 20:30:53,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:30:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 20:30:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 755. [2021-06-05 20:30:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.3448275862068964) internal successors, (1768), 754 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1768 transitions. [2021-06-05 20:30:53,845 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1768 transitions. Word has length 21 [2021-06-05 20:30:53,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:53,845 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 1768 transitions. [2021-06-05 20:30:53,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1768 transitions. [2021-06-05 20:30:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:53,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:53,847 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:54,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 20:30:54,070 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:54,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1920430847, now seen corresponding path program 16 times [2021-06-05 20:30:54,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:54,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493803322] [2021-06-05 20:30:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:54,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:54,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493803322] [2021-06-05 20:30:54,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493803322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:54,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238247567] [2021-06-05 20:30:54,097 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:54,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:30:54,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:54,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:54,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238247567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:54,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:54,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:54,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949782155] [2021-06-05 20:30:54,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:54,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:54,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:54,198 INFO L87 Difference]: Start difference. First operand 755 states and 1768 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:54,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:54,427 INFO L93 Difference]: Finished difference Result 1127 states and 2483 transitions. [2021-06-05 20:30:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:30:54,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:54,431 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 20:30:54,431 INFO L226 Difference]: Without dead ends: 1127 [2021-06-05 20:30:54,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:30:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-05 20:30:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 814. [2021-06-05 20:30:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.3702337023370235) internal successors, (1927), 813 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1927 transitions. [2021-06-05 20:30:54,450 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1927 transitions. Word has length 21 [2021-06-05 20:30:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:54,450 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 1927 transitions. [2021-06-05 20:30:54,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1927 transitions. [2021-06-05 20:30:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:54,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:54,452 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:54,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 20:30:54,675 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1225078781, now seen corresponding path program 17 times [2021-06-05 20:30:54,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:54,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653819272] [2021-06-05 20:30:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:54,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:54,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653819272] [2021-06-05 20:30:54,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653819272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:54,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337200023] [2021-06-05 20:30:54,707 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:54,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:54,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:54,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:54,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:54,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337200023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:54,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:54,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:54,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752007798] [2021-06-05 20:30:54,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:54,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:54,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:54,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:54,802 INFO L87 Difference]: Start difference. First operand 814 states and 1927 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:55,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:55,055 INFO L93 Difference]: Finished difference Result 1260 states and 2849 transitions. [2021-06-05 20:30:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:30:55,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:55,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:55,058 INFO L225 Difference]: With dead ends: 1260 [2021-06-05 20:30:55,058 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 20:30:55,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:30:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 20:30:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 912. [2021-06-05 20:30:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.37211855104281) internal successors, (2161), 911 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2161 transitions. [2021-06-05 20:30:55,078 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2161 transitions. Word has length 21 [2021-06-05 20:30:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:55,078 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 2161 transitions. [2021-06-05 20:30:55,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2161 transitions. [2021-06-05 20:30:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:55,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:55,080 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:55,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:55,293 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:55,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1371010823, now seen corresponding path program 18 times [2021-06-05 20:30:55,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:55,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661688122] [2021-06-05 20:30:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:55,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:55,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661688122] [2021-06-05 20:30:55,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661688122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:55,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308346826] [2021-06-05 20:30:55,322 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:55,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:30:55,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:55,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308346826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:55,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:55,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:55,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910209565] [2021-06-05 20:30:55,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:55,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:55,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:55,399 INFO L87 Difference]: Start difference. First operand 912 states and 2161 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:55,632 INFO L93 Difference]: Finished difference Result 1273 states and 2846 transitions. [2021-06-05 20:30:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:30:55,632 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:55,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:55,635 INFO L225 Difference]: With dead ends: 1273 [2021-06-05 20:30:55,636 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 20:30:55,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:30:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 20:30:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 914. [2021-06-05 20:30:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.36144578313253) internal successors, (2156), 913 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2156 transitions. [2021-06-05 20:30:55,654 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2156 transitions. Word has length 21 [2021-06-05 20:30:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:55,654 INFO L482 AbstractCegarLoop]: Abstraction has 914 states and 2156 transitions. [2021-06-05 20:30:55,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2156 transitions. [2021-06-05 20:30:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:55,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:55,656 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:55,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:55,859 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:55,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1019284071, now seen corresponding path program 19 times [2021-06-05 20:30:55,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:55,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114726327] [2021-06-05 20:30:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:55,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:55,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114726327] [2021-06-05 20:30:55,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114726327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:55,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402353636] [2021-06-05 20:30:55,889 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:55,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:55,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402353636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:55,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:55,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 20:30:55,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078161795] [2021-06-05 20:30:55,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:55,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:55,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:55,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:55,971 INFO L87 Difference]: Start difference. First operand 914 states and 2156 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:56,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:56,156 INFO L93 Difference]: Finished difference Result 1088 states and 2462 transitions. [2021-06-05 20:30:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:30:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:56,159 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 20:30:56,159 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 20:30:56,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:30:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 20:30:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 920. [2021-06-05 20:30:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.354733405875952) internal successors, (2164), 919 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2164 transitions. [2021-06-05 20:30:56,186 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2164 transitions. Word has length 21 [2021-06-05 20:30:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:56,186 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2164 transitions. [2021-06-05 20:30:56,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2164 transitions. [2021-06-05 20:30:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:56,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:56,188 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:56,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 20:30:56,401 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:56,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2120917209, now seen corresponding path program 20 times [2021-06-05 20:30:56,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:56,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46061379] [2021-06-05 20:30:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:56,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:56,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46061379] [2021-06-05 20:30:56,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46061379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:56,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802395731] [2021-06-05 20:30:56,434 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 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 [2021-06-05 20:30:56,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:56,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:56,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:56,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802395731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:56,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:56,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 20:30:56,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491686509] [2021-06-05 20:30:56,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 20:30:56,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 20:30:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 20:30:56,533 INFO L87 Difference]: Start difference. First operand 920 states and 2164 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:56,751 INFO L93 Difference]: Finished difference Result 1291 states and 2913 transitions. [2021-06-05 20:30:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:30:56,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:56,755 INFO L225 Difference]: With dead ends: 1291 [2021-06-05 20:30:56,755 INFO L226 Difference]: Without dead ends: 1291 [2021-06-05 20:30:56,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:30:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-05 20:30:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 967. [2021-06-05 20:30:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 2.3509316770186337) internal successors, (2271), 966 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2271 transitions. [2021-06-05 20:30:56,773 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2271 transitions. Word has length 21 [2021-06-05 20:30:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:56,773 INFO L482 AbstractCegarLoop]: Abstraction has 967 states and 2271 transitions. [2021-06-05 20:30:56,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2271 transitions. [2021-06-05 20:30:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:56,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:56,775 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:56,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:56,989 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:56,989 INFO L82 PathProgramCache]: Analyzing trace with hash 490589721, now seen corresponding path program 21 times [2021-06-05 20:30:56,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:56,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568322221] [2021-06-05 20:30:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:57,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:57,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568322221] [2021-06-05 20:30:57,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568322221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:57,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179823029] [2021-06-05 20:30:57,013 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:57,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:30:57,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:57,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:57,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179823029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:57,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:57,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 20:30:57,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223307573] [2021-06-05 20:30:57,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:57,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:57,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:57,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:57,093 INFO L87 Difference]: Start difference. First operand 967 states and 2271 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:57,292 INFO L93 Difference]: Finished difference Result 1476 states and 3326 transitions. [2021-06-05 20:30:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:30:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:57,297 INFO L225 Difference]: With dead ends: 1476 [2021-06-05 20:30:57,297 INFO L226 Difference]: Without dead ends: 1476 [2021-06-05 20:30:57,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:30:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-06-05 20:30:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1140. [2021-06-05 20:30:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 2.357330992098332) internal successors, (2685), 1139 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 2685 transitions. [2021-06-05 20:30:57,323 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 2685 transitions. Word has length 21 [2021-06-05 20:30:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:57,323 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 2685 transitions. [2021-06-05 20:30:57,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 2685 transitions. [2021-06-05 20:30:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:57,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:57,325 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:57,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 20:30:57,548 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1845842099, now seen corresponding path program 22 times [2021-06-05 20:30:57,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:57,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860181940] [2021-06-05 20:30:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:30:57,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:57,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860181940] [2021-06-05 20:30:57,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860181940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:57,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869903294] [2021-06-05 20:30:57,568 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:57,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:30:57,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:57,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:57,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869903294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:57,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:57,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 20:30:57,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817232402] [2021-06-05 20:30:57,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 20:30:57,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:57,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 20:30:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:30:57,649 INFO L87 Difference]: Start difference. First operand 1140 states and 2685 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:57,852 INFO L93 Difference]: Finished difference Result 1429 states and 3227 transitions. [2021-06-05 20:30:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:30:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:57,857 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 20:30:57,857 INFO L226 Difference]: Without dead ends: 1423 [2021-06-05 20:30:57,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:30:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-06-05 20:30:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1088. [2021-06-05 20:30:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 2.340386384544618) internal successors, (2544), 1087 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 2544 transitions. [2021-06-05 20:30:57,879 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 2544 transitions. Word has length 21 [2021-06-05 20:30:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:57,879 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 2544 transitions. [2021-06-05 20:30:57,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 2544 transitions. [2021-06-05 20:30:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 20:30:57,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:57,881 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:58,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 20:30:58,097 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:58,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1339495833, now seen corresponding path program 23 times [2021-06-05 20:30:58,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:58,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376798555] [2021-06-05 20:30:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:58,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:58,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376798555] [2021-06-05 20:30:58,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376798555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:58,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224789924] [2021-06-05 20:30:58,120 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:58,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 20:30:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:30:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:58,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224789924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:58,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:58,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 20:30:58,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463459908] [2021-06-05 20:30:58,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 20:30:58,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:58,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 20:30:58,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 20:30:58,211 INFO L87 Difference]: Start difference. First operand 1088 states and 2544 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:58,445 INFO L93 Difference]: Finished difference Result 1433 states and 3263 transitions. [2021-06-05 20:30:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:30:58,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 20:30:58,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:58,448 INFO L225 Difference]: With dead ends: 1433 [2021-06-05 20:30:58,448 INFO L226 Difference]: Without dead ends: 1409 [2021-06-05 20:30:58,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:30:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-06-05 20:30:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1189. [2021-06-05 20:30:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.3501683501683504) internal successors, (2792), 1188 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2792 transitions. [2021-06-05 20:30:58,470 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2792 transitions. Word has length 21 [2021-06-05 20:30:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:58,471 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 2792 transitions. [2021-06-05 20:30:58,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2792 transitions. [2021-06-05 20:30:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 20:30:58,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:58,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:58,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 20:30:58,696 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:58,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2073484698, now seen corresponding path program 24 times [2021-06-05 20:30:58,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:58,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122869060] [2021-06-05 20:30:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:58,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:58,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122869060] [2021-06-05 20:30:58,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122869060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:58,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594767780] [2021-06-05 20:30:58,735 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:58,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 20:30:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 20:30:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:58,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594767780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:58,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:58,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 20:30:58,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99302709] [2021-06-05 20:30:58,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:58,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:58,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:58,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:58,809 INFO L87 Difference]: Start difference. First operand 1189 states and 2792 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:58,831 INFO L93 Difference]: Finished difference Result 1689 states and 3935 transitions. [2021-06-05 20:30:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 20:30:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 20:30:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:58,834 INFO L225 Difference]: With dead ends: 1689 [2021-06-05 20:30:58,834 INFO L226 Difference]: Without dead ends: 1668 [2021-06-05 20:30:58,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-06-05 20:30:58,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1342. [2021-06-05 20:30:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 2.354213273676361) internal successors, (3157), 1341 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 3157 transitions. [2021-06-05 20:30:58,858 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 3157 transitions. Word has length 24 [2021-06-05 20:30:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:58,858 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 3157 transitions. [2021-06-05 20:30:58,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:58,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 3157 transitions. [2021-06-05 20:30:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 20:30:58,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:58,861 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:59,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 20:30:59,077 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1872026954, now seen corresponding path program 25 times [2021-06-05 20:30:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:59,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199959956] [2021-06-05 20:30:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:30:59,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:59,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199959956] [2021-06-05 20:30:59,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199959956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:59,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004144786] [2021-06-05 20:30:59,111 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:59,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 20:30:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:30:59,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004144786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:59,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:59,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 20:30:59,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674370266] [2021-06-05 20:30:59,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:59,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:59,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:59,185 INFO L87 Difference]: Start difference. First operand 1342 states and 3157 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:59,208 INFO L93 Difference]: Finished difference Result 2105 states and 4959 transitions. [2021-06-05 20:30:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 20:30:59,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 20:30:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:59,213 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 20:30:59,213 INFO L226 Difference]: Without dead ends: 2078 [2021-06-05 20:30:59,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-06-05 20:30:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1674. [2021-06-05 20:30:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.3915122534369395) internal successors, (4001), 1673 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4001 transitions. [2021-06-05 20:30:59,245 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4001 transitions. Word has length 24 [2021-06-05 20:30:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:59,245 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 4001 transitions. [2021-06-05 20:30:59,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4001 transitions. [2021-06-05 20:30:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 20:30:59,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:59,249 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:59,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 20:30:59,472 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:59,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:59,472 INFO L82 PathProgramCache]: Analyzing trace with hash 136519804, now seen corresponding path program 26 times [2021-06-05 20:30:59,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:59,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281519038] [2021-06-05 20:30:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:30:59,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281519038] [2021-06-05 20:30:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281519038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518225027] [2021-06-05 20:30:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:59,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:30:59,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 20:30:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:30:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:30:59,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518225027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:59,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:30:59,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 20:30:59,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436744889] [2021-06-05 20:30:59,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 20:30:59,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:30:59,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 20:30:59,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:59,572 INFO L87 Difference]: Start difference. First operand 1674 states and 4001 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:30:59,618 INFO L93 Difference]: Finished difference Result 2456 states and 5842 transitions. [2021-06-05 20:30:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 20:30:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 20:30:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:30:59,622 INFO L225 Difference]: With dead ends: 2456 [2021-06-05 20:30:59,622 INFO L226 Difference]: Without dead ends: 2438 [2021-06-05 20:30:59,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:30:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-06-05 20:30:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2316. [2021-06-05 20:30:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 2.414686825053996) internal successors, (5590), 2315 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 5590 transitions. [2021-06-05 20:30:59,657 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 5590 transitions. Word has length 24 [2021-06-05 20:30:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:30:59,658 INFO L482 AbstractCegarLoop]: Abstraction has 2316 states and 5590 transitions. [2021-06-05 20:30:59,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:30:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 5590 transitions. [2021-06-05 20:30:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:30:59,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:30:59,662 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:30:59,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:59,875 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:30:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:30:59,875 INFO L82 PathProgramCache]: Analyzing trace with hash -248914403, now seen corresponding path program 27 times [2021-06-05 20:30:59,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:30:59,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862565038] [2021-06-05 20:30:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:30:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:30:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:30:59,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:30:59,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862565038] [2021-06-05 20:30:59,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862565038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:30:59,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735963669] [2021-06-05 20:30:59,913 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:30:59,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 20:30:59,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:30:59,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:30:59,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:00,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735963669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:00,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:00,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 20:31:00,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447259763] [2021-06-05 20:31:00,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 20:31:00,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:00,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 20:31:00,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 20:31:00,029 INFO L87 Difference]: Start difference. First operand 2316 states and 5590 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:00,235 INFO L93 Difference]: Finished difference Result 3314 states and 7980 transitions. [2021-06-05 20:31:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 20:31:00,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:00,240 INFO L225 Difference]: With dead ends: 3314 [2021-06-05 20:31:00,240 INFO L226 Difference]: Without dead ends: 3314 [2021-06-05 20:31:00,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:00,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2021-06-05 20:31:00,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 2398. [2021-06-05 20:31:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.411764705882353) internal successors, (5781), 2397 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 5781 transitions. [2021-06-05 20:31:00,283 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 5781 transitions. Word has length 27 [2021-06-05 20:31:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:00,283 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 5781 transitions. [2021-06-05 20:31:00,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 5781 transitions. [2021-06-05 20:31:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:00,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:00,287 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:00,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 20:31:00,501 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:00,501 INFO L82 PathProgramCache]: Analyzing trace with hash 36062319, now seen corresponding path program 28 times [2021-06-05 20:31:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:00,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527013042] [2021-06-05 20:31:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:00,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:00,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527013042] [2021-06-05 20:31:00,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527013042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:00,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021562644] [2021-06-05 20:31:00,541 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:00,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:00,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:00,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:00,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021562644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:00,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:00,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 20:31:00,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328433566] [2021-06-05 20:31:00,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 20:31:00,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:00,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 20:31:00,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 20:31:00,641 INFO L87 Difference]: Start difference. First operand 2398 states and 5781 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:00,767 INFO L93 Difference]: Finished difference Result 3978 states and 9470 transitions. [2021-06-05 20:31:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 20:31:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:00,774 INFO L225 Difference]: With dead ends: 3978 [2021-06-05 20:31:00,774 INFO L226 Difference]: Without dead ends: 3952 [2021-06-05 20:31:00,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-06-05 20:31:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 2398. [2021-06-05 20:31:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.41093032957864) internal successors, (5779), 2397 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 5779 transitions. [2021-06-05 20:31:00,821 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 5779 transitions. Word has length 27 [2021-06-05 20:31:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:00,822 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 5779 transitions. [2021-06-05 20:31:00,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 5779 transitions. [2021-06-05 20:31:00,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:00,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:00,826 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:01,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 20:31:01,049 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:01,049 INFO L82 PathProgramCache]: Analyzing trace with hash -176137663, now seen corresponding path program 29 times [2021-06-05 20:31:01,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:01,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133818781] [2021-06-05 20:31:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:01,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:01,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133818781] [2021-06-05 20:31:01,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133818781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:01,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948267942] [2021-06-05 20:31:01,107 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:01,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 20:31:01,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:01,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:01,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948267942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:01,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:01,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:01,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180767340] [2021-06-05 20:31:01,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:01,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:01,235 INFO L87 Difference]: Start difference. First operand 2398 states and 5779 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:01,762 INFO L93 Difference]: Finished difference Result 5235 states and 12267 transitions. [2021-06-05 20:31:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 20:31:01,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:01,770 INFO L225 Difference]: With dead ends: 5235 [2021-06-05 20:31:01,771 INFO L226 Difference]: Without dead ends: 5233 [2021-06-05 20:31:01,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 394.3ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 20:31:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2021-06-05 20:31:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 3397. [2021-06-05 20:31:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 2.4375736160188457) internal successors, (8278), 3396 states have internal predecessors, (8278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 8278 transitions. [2021-06-05 20:31:01,851 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 8278 transitions. Word has length 27 [2021-06-05 20:31:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:01,851 INFO L482 AbstractCegarLoop]: Abstraction has 3397 states and 8278 transitions. [2021-06-05 20:31:01,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 8278 transitions. [2021-06-05 20:31:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:01,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:01,856 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:02,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:02,075 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash -871489729, now seen corresponding path program 30 times [2021-06-05 20:31:02,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:02,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693137266] [2021-06-05 20:31:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:02,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:02,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693137266] [2021-06-05 20:31:02,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693137266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:02,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903954911] [2021-06-05 20:31:02,121 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:02,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 20:31:02,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:02,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903954911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:02,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:02,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:02,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314140601] [2021-06-05 20:31:02,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:02,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:02,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:02,253 INFO L87 Difference]: Start difference. First operand 3397 states and 8278 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:02,618 INFO L93 Difference]: Finished difference Result 4601 states and 10905 transitions. [2021-06-05 20:31:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:31:02,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:02,623 INFO L225 Difference]: With dead ends: 4601 [2021-06-05 20:31:02,623 INFO L226 Difference]: Without dead ends: 4597 [2021-06-05 20:31:02,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:31:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4597 states. [2021-06-05 20:31:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4597 to 3714. [2021-06-05 20:31:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.449232426609211) internal successors, (9094), 3713 states have internal predecessors, (9094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9094 transitions. [2021-06-05 20:31:02,693 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9094 transitions. Word has length 27 [2021-06-05 20:31:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:02,693 INFO L482 AbstractCegarLoop]: Abstraction has 3714 states and 9094 transitions. [2021-06-05 20:31:02,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9094 transitions. [2021-06-05 20:31:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:02,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:02,699 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:02,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 20:31:02,921 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:02,921 INFO L82 PathProgramCache]: Analyzing trace with hash 827387963, now seen corresponding path program 31 times [2021-06-05 20:31:02,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:02,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681266303] [2021-06-05 20:31:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:02,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:02,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681266303] [2021-06-05 20:31:02,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681266303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:02,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555828319] [2021-06-05 20:31:02,958 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:02,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:03,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555828319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:03,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:03,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:03,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518716099] [2021-06-05 20:31:03,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:03,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:03,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:03,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:03,066 INFO L87 Difference]: Start difference. First operand 3714 states and 9094 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:03,519 INFO L93 Difference]: Finished difference Result 4766 states and 11235 transitions. [2021-06-05 20:31:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 20:31:03,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:03,524 INFO L225 Difference]: With dead ends: 4766 [2021-06-05 20:31:03,524 INFO L226 Difference]: Without dead ends: 4766 [2021-06-05 20:31:03,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 20:31:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2021-06-05 20:31:03,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 3355. [2021-06-05 20:31:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 2.4421586165772213) internal successors, (8191), 3354 states have internal predecessors, (8191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:03,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 8191 transitions. [2021-06-05 20:31:03,591 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 8191 transitions. Word has length 27 [2021-06-05 20:31:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:03,591 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 8191 transitions. [2021-06-05 20:31:03,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 8191 transitions. [2021-06-05 20:31:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:03,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:03,596 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:03,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:03,809 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1179114715, now seen corresponding path program 32 times [2021-06-05 20:31:03,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:03,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612042137] [2021-06-05 20:31:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:03,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:03,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612042137] [2021-06-05 20:31:03,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612042137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:03,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550864211] [2021-06-05 20:31:03,850 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 [2021-06-05 20:31:03,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:03,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:03,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:03,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550864211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:03,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:03,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:03,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938616266] [2021-06-05 20:31:03,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:03,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:03,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:03,961 INFO L87 Difference]: Start difference. First operand 3355 states and 8191 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:04,286 INFO L93 Difference]: Finished difference Result 5106 states and 12038 transitions. [2021-06-05 20:31:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:31:04,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:04,291 INFO L225 Difference]: With dead ends: 5106 [2021-06-05 20:31:04,291 INFO L226 Difference]: Without dead ends: 5100 [2021-06-05 20:31:04,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-06-05 20:31:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 2971. [2021-06-05 20:31:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2970 states have (on average 2.426262626262626) internal successors, (7206), 2970 states have internal predecessors, (7206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 7206 transitions. [2021-06-05 20:31:04,362 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 7206 transitions. Word has length 27 [2021-06-05 20:31:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:04,362 INFO L482 AbstractCegarLoop]: Abstraction has 2971 states and 7206 transitions. [2021-06-05 20:31:04,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 7206 transitions. [2021-06-05 20:31:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:04,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:04,367 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:04,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 20:31:04,579 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:04,580 INFO L82 PathProgramCache]: Analyzing trace with hash 672768449, now seen corresponding path program 33 times [2021-06-05 20:31:04,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:04,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929449388] [2021-06-05 20:31:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:04,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:04,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929449388] [2021-06-05 20:31:04,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929449388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:04,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371586818] [2021-06-05 20:31:04,614 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 [2021-06-05 20:31:04,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:31:04,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:04,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:04,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371586818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:04,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:04,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:04,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019532295] [2021-06-05 20:31:04,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:04,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:04,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:04,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:04,721 INFO L87 Difference]: Start difference. First operand 2971 states and 7206 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:05,029 INFO L93 Difference]: Finished difference Result 5036 states and 11882 transitions. [2021-06-05 20:31:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:31:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:05,035 INFO L225 Difference]: With dead ends: 5036 [2021-06-05 20:31:05,035 INFO L226 Difference]: Without dead ends: 5012 [2021-06-05 20:31:05,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 20:31:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2021-06-05 20:31:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 3115. [2021-06-05 20:31:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3115 states, 3114 states have (on average 2.423892100192678) internal successors, (7548), 3114 states have internal predecessors, (7548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 7548 transitions. [2021-06-05 20:31:05,088 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 7548 transitions. Word has length 27 [2021-06-05 20:31:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:05,088 INFO L482 AbstractCegarLoop]: Abstraction has 3115 states and 7548 transitions. [2021-06-05 20:31:05,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 7548 transitions. [2021-06-05 20:31:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:05,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:05,093 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:05,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 20:31:05,309 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:05,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1880862689, now seen corresponding path program 34 times [2021-06-05 20:31:05,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:05,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137766972] [2021-06-05 20:31:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:05,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:05,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137766972] [2021-06-05 20:31:05,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137766972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:05,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642670125] [2021-06-05 20:31:05,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:05,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:05,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:05,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:05,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:05,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642670125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:05,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:05,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:05,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284840297] [2021-06-05 20:31:05,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:05,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:05,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:05,479 INFO L87 Difference]: Start difference. First operand 3115 states and 7548 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:05,725 INFO L93 Difference]: Finished difference Result 4575 states and 10848 transitions. [2021-06-05 20:31:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:31:05,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:05,730 INFO L225 Difference]: With dead ends: 4575 [2021-06-05 20:31:05,730 INFO L226 Difference]: Without dead ends: 4554 [2021-06-05 20:31:05,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-06-05 20:31:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-06-05 20:31:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3118. [2021-06-05 20:31:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 2.421880012832852) internal successors, (7549), 3117 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 7549 transitions. [2021-06-05 20:31:05,782 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 7549 transitions. Word has length 27 [2021-06-05 20:31:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:05,782 INFO L482 AbstractCegarLoop]: Abstraction has 3118 states and 7549 transitions. [2021-06-05 20:31:05,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 7549 transitions. [2021-06-05 20:31:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:05,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:05,787 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:05,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 20:31:05,997 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:05,997 INFO L82 PathProgramCache]: Analyzing trace with hash -496641799, now seen corresponding path program 35 times [2021-06-05 20:31:05,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:05,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551702793] [2021-06-05 20:31:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:06,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:06,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551702793] [2021-06-05 20:31:06,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551702793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:06,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965689860] [2021-06-05 20:31:06,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:06,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 20:31:06,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:06,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:06,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:06,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965689860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:06,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:06,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 20:31:06,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582134701] [2021-06-05 20:31:06,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 20:31:06,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 20:31:06,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 20:31:06,178 INFO L87 Difference]: Start difference. First operand 3118 states and 7549 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:06,639 INFO L93 Difference]: Finished difference Result 4547 states and 10660 transitions. [2021-06-05 20:31:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:31:06,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:06,643 INFO L225 Difference]: With dead ends: 4547 [2021-06-05 20:31:06,643 INFO L226 Difference]: Without dead ends: 4527 [2021-06-05 20:31:06,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 20:31:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2021-06-05 20:31:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 3177. [2021-06-05 20:31:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 2.413727959697733) internal successors, (7666), 3176 states have internal predecessors, (7666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 7666 transitions. [2021-06-05 20:31:06,695 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 7666 transitions. Word has length 27 [2021-06-05 20:31:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:06,724 INFO L482 AbstractCegarLoop]: Abstraction has 3177 states and 7666 transitions. [2021-06-05 20:31:06,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 7666 transitions. [2021-06-05 20:31:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:06,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:06,728 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:06,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 20:31:06,929 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:06,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1925118087, now seen corresponding path program 36 times [2021-06-05 20:31:06,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:06,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647761529] [2021-06-05 20:31:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:06,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:06,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647761529] [2021-06-05 20:31:06,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647761529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:06,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065541093] [2021-06-05 20:31:06,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:06,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 20:31:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:06,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:06,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:07,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065541093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:07,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:07,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 20:31:07,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601372271] [2021-06-05 20:31:07,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:07,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:07,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:07,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:07,087 INFO L87 Difference]: Start difference. First operand 3177 states and 7666 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:07,556 INFO L93 Difference]: Finished difference Result 4685 states and 10870 transitions. [2021-06-05 20:31:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 20:31:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:07,560 INFO L225 Difference]: With dead ends: 4685 [2021-06-05 20:31:07,560 INFO L226 Difference]: Without dead ends: 4682 [2021-06-05 20:31:07,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 20:31:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4682 states. [2021-06-05 20:31:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4682 to 3227. [2021-06-05 20:31:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3226 states have (on average 2.4097954122752636) internal successors, (7774), 3226 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 7774 transitions. [2021-06-05 20:31:07,607 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 7774 transitions. Word has length 27 [2021-06-05 20:31:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:07,607 INFO L482 AbstractCegarLoop]: Abstraction has 3227 states and 7774 transitions. [2021-06-05 20:31:07,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 7774 transitions. [2021-06-05 20:31:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:07,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:07,611 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:07,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:07,811 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:07,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1183683391, now seen corresponding path program 37 times [2021-06-05 20:31:07,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:07,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656130981] [2021-06-05 20:31:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:07,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:07,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656130981] [2021-06-05 20:31:07,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656130981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:07,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25154509] [2021-06-05 20:31:07,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:07,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:07,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:07,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25154509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:07,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:07,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 20:31:07,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560577552] [2021-06-05 20:31:07,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 20:31:07,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 20:31:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:31:07,968 INFO L87 Difference]: Start difference. First operand 3227 states and 7774 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:08,429 INFO L93 Difference]: Finished difference Result 5003 states and 11695 transitions. [2021-06-05 20:31:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:31:08,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:08,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:08,434 INFO L225 Difference]: With dead ends: 5003 [2021-06-05 20:31:08,434 INFO L226 Difference]: Without dead ends: 4965 [2021-06-05 20:31:08,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 20:31:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2021-06-05 20:31:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 3763. [2021-06-05 20:31:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.4066985645933014) internal successors, (9054), 3762 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 9054 transitions. [2021-06-05 20:31:08,483 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 9054 transitions. Word has length 27 [2021-06-05 20:31:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:08,483 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 9054 transitions. [2021-06-05 20:31:08,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 9054 transitions. [2021-06-05 20:31:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:08,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:08,487 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:08,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 20:31:08,687 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash -260837957, now seen corresponding path program 38 times [2021-06-05 20:31:08,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:08,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121122691] [2021-06-05 20:31:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:08,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:08,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121122691] [2021-06-05 20:31:08,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121122691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:08,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695505971] [2021-06-05 20:31:08,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:08,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:08,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:08,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:08,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:08,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695505971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:08,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:08,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 20:31:08,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049764329] [2021-06-05 20:31:08,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:08,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:08,818 INFO L87 Difference]: Start difference. First operand 3763 states and 9054 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:09,302 INFO L93 Difference]: Finished difference Result 6111 states and 14280 transitions. [2021-06-05 20:31:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 20:31:09,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:09,311 INFO L225 Difference]: With dead ends: 6111 [2021-06-05 20:31:09,311 INFO L226 Difference]: Without dead ends: 6108 [2021-06-05 20:31:09,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 20:31:09,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2021-06-05 20:31:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 4898. [2021-06-05 20:31:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4898 states, 4897 states have (on average 2.404533387788442) internal successors, (11775), 4897 states have internal predecessors, (11775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4898 states to 4898 states and 11775 transitions. [2021-06-05 20:31:09,434 INFO L78 Accepts]: Start accepts. Automaton has 4898 states and 11775 transitions. Word has length 27 [2021-06-05 20:31:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:09,434 INFO L482 AbstractCegarLoop]: Abstraction has 4898 states and 11775 transitions. [2021-06-05 20:31:09,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4898 states and 11775 transitions. [2021-06-05 20:31:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:09,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:09,442 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:09,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:09,657 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2132252835, now seen corresponding path program 39 times [2021-06-05 20:31:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:09,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484751876] [2021-06-05 20:31:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:09,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:09,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484751876] [2021-06-05 20:31:09,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484751876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:09,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227651882] [2021-06-05 20:31:09,696 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 [2021-06-05 20:31:09,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 20:31:09,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:09,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:09,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227651882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:09,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:09,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 20:31:09,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412552759] [2021-06-05 20:31:09,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 20:31:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:09,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 20:31:09,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 20:31:09,797 INFO L87 Difference]: Start difference. First operand 4898 states and 11775 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:09,951 INFO L93 Difference]: Finished difference Result 5703 states and 13619 transitions. [2021-06-05 20:31:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 20:31:09,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:09,957 INFO L225 Difference]: With dead ends: 5703 [2021-06-05 20:31:09,957 INFO L226 Difference]: Without dead ends: 5703 [2021-06-05 20:31:09,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-06-05 20:31:10,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 4948. [2021-06-05 20:31:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4947 states have (on average 2.4042854255104102) internal successors, (11894), 4947 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 11894 transitions. [2021-06-05 20:31:10,017 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 11894 transitions. Word has length 27 [2021-06-05 20:31:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:10,018 INFO L482 AbstractCegarLoop]: Abstraction has 4948 states and 11894 transitions. [2021-06-05 20:31:10,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 11894 transitions. [2021-06-05 20:31:10,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:10,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:10,022 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:10,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:10,223 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:10,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1163647225, now seen corresponding path program 40 times [2021-06-05 20:31:10,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:10,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864314782] [2021-06-05 20:31:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:10,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:10,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864314782] [2021-06-05 20:31:10,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864314782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:10,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336440860] [2021-06-05 20:31:10,261 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) [2021-06-05 20:31:10,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:10,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:10,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:10,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:10,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336440860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:10,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:10,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 20:31:10,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348457199] [2021-06-05 20:31:10,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 20:31:10,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 20:31:10,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 20:31:10,378 INFO L87 Difference]: Start difference. First operand 4948 states and 11894 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:10,500 INFO L93 Difference]: Finished difference Result 6194 states and 14713 transitions. [2021-06-05 20:31:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 20:31:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:10,506 INFO L225 Difference]: With dead ends: 6194 [2021-06-05 20:31:10,506 INFO L226 Difference]: Without dead ends: 6178 [2021-06-05 20:31:10,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:31:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6178 states. [2021-06-05 20:31:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6178 to 4948. [2021-06-05 20:31:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4947 states have (on average 2.404083282797655) internal successors, (11893), 4947 states have internal predecessors, (11893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 11893 transitions. [2021-06-05 20:31:10,601 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 11893 transitions. Word has length 27 [2021-06-05 20:31:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:10,601 INFO L482 AbstractCegarLoop]: Abstraction has 4948 states and 11893 transitions. [2021-06-05 20:31:10,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 11893 transitions. [2021-06-05 20:31:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:10,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:10,605 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:10,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 20:31:10,806 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1452225087, now seen corresponding path program 41 times [2021-06-05 20:31:10,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:10,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159207813] [2021-06-05 20:31:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:10,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:10,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159207813] [2021-06-05 20:31:10,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159207813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:10,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569114007] [2021-06-05 20:31:10,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:10,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 20:31:10,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:10,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:10,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:10,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569114007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:10,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:10,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:10,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005313756] [2021-06-05 20:31:10,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:10,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:10,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:10,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:10,935 INFO L87 Difference]: Start difference. First operand 4948 states and 11893 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:11,187 INFO L93 Difference]: Finished difference Result 5593 states and 13250 transitions. [2021-06-05 20:31:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:31:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:11,192 INFO L225 Difference]: With dead ends: 5593 [2021-06-05 20:31:11,193 INFO L226 Difference]: Without dead ends: 5593 [2021-06-05 20:31:11,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-06-05 20:31:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-06-05 20:31:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 5023. [2021-06-05 20:31:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5022 states have (on average 2.4034249303066506) internal successors, (12070), 5022 states have internal predecessors, (12070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 12070 transitions. [2021-06-05 20:31:11,273 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 12070 transitions. Word has length 27 [2021-06-05 20:31:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:11,273 INFO L482 AbstractCegarLoop]: Abstraction has 5023 states and 12070 transitions. [2021-06-05 20:31:11,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 12070 transitions. [2021-06-05 20:31:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:11,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:11,279 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:11,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:11,489 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash 287883453, now seen corresponding path program 42 times [2021-06-05 20:31:11,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:11,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408557446] [2021-06-05 20:31:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:11,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:11,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408557446] [2021-06-05 20:31:11,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408557446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:11,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93231393] [2021-06-05 20:31:11,524 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:11,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 20:31:11,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:11,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93231393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:11,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:11,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:11,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279069002] [2021-06-05 20:31:11,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:11,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:11,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:11,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:11,633 INFO L87 Difference]: Start difference. First operand 5023 states and 12070 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:11,887 INFO L93 Difference]: Finished difference Result 6424 states and 15145 transitions. [2021-06-05 20:31:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:31:11,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:11,893 INFO L225 Difference]: With dead ends: 6424 [2021-06-05 20:31:11,893 INFO L226 Difference]: Without dead ends: 6410 [2021-06-05 20:31:11,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:31:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6410 states. [2021-06-05 20:31:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6410 to 5222. [2021-06-05 20:31:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 2.411798506033327) internal successors, (12592), 5221 states have internal predecessors, (12592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 12592 transitions. [2021-06-05 20:31:12,006 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 12592 transitions. Word has length 27 [2021-06-05 20:31:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:12,006 INFO L482 AbstractCegarLoop]: Abstraction has 5222 states and 12592 transitions. [2021-06-05 20:31:12,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 12592 transitions. [2021-06-05 20:31:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:12,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:12,010 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:12,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 20:31:12,211 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:12,211 INFO L82 PathProgramCache]: Analyzing trace with hash 712141431, now seen corresponding path program 43 times [2021-06-05 20:31:12,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:12,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433752183] [2021-06-05 20:31:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:12,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:12,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433752183] [2021-06-05 20:31:12,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433752183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:12,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128833534] [2021-06-05 20:31:12,248 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:12,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:12,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:12,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128833534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:12,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:12,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:12,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535986125] [2021-06-05 20:31:12,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:12,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:12,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:12,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:12,351 INFO L87 Difference]: Start difference. First operand 5222 states and 12592 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:12,749 INFO L93 Difference]: Finished difference Result 6346 states and 14943 transitions. [2021-06-05 20:31:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:31:12,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:12,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:12,755 INFO L225 Difference]: With dead ends: 6346 [2021-06-05 20:31:12,756 INFO L226 Difference]: Without dead ends: 6346 [2021-06-05 20:31:12,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 20:31:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6346 states. [2021-06-05 20:31:12,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6346 to 5473. [2021-06-05 20:31:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 2.4089912280701755) internal successors, (13182), 5472 states have internal predecessors, (13182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 13182 transitions. [2021-06-05 20:31:12,825 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 13182 transitions. Word has length 27 [2021-06-05 20:31:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:12,825 INFO L482 AbstractCegarLoop]: Abstraction has 5473 states and 13182 transitions. [2021-06-05 20:31:12,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 13182 transitions. [2021-06-05 20:31:12,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:12,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:12,831 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:13,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:13,043 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash 106011833, now seen corresponding path program 44 times [2021-06-05 20:31:13,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:13,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249510474] [2021-06-05 20:31:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:13,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249510474] [2021-06-05 20:31:13,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249510474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075070282] [2021-06-05 20:31:13,076 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:13,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:13,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:13,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075070282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:13,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:13,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:13,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881017134] [2021-06-05 20:31:13,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:13,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:13,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:13,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:13,174 INFO L87 Difference]: Start difference. First operand 5473 states and 13182 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:13,539 INFO L93 Difference]: Finished difference Result 7393 states and 17489 transitions. [2021-06-05 20:31:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:31:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:13,547 INFO L225 Difference]: With dead ends: 7393 [2021-06-05 20:31:13,547 INFO L226 Difference]: Without dead ends: 7377 [2021-06-05 20:31:13,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7377 states. [2021-06-05 20:31:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7377 to 6211. [2021-06-05 20:31:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6211 states, 6210 states have (on average 2.4033816425120773) internal successors, (14925), 6210 states have internal predecessors, (14925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6211 states to 6211 states and 14925 transitions. [2021-06-05 20:31:13,630 INFO L78 Accepts]: Start accepts. Automaton has 6211 states and 14925 transitions. Word has length 27 [2021-06-05 20:31:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:13,630 INFO L482 AbstractCegarLoop]: Abstraction has 6211 states and 14925 transitions. [2021-06-05 20:31:13,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6211 states and 14925 transitions. [2021-06-05 20:31:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:13,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:13,635 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:13,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 20:31:13,835 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:13,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1770201793, now seen corresponding path program 45 times [2021-06-05 20:31:13,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:13,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777090312] [2021-06-05 20:31:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:13,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:13,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777090312] [2021-06-05 20:31:13,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777090312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:13,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75694609] [2021-06-05 20:31:13,873 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:13,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 20:31:13,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:13,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:13,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75694609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:13,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:13,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:13,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151897849] [2021-06-05 20:31:13,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:13,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:13,998 INFO L87 Difference]: Start difference. First operand 6211 states and 14925 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:14,552 INFO L93 Difference]: Finished difference Result 7527 states and 17693 transitions. [2021-06-05 20:31:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 20:31:14,553 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:14,560 INFO L225 Difference]: With dead ends: 7527 [2021-06-05 20:31:14,560 INFO L226 Difference]: Without dead ends: 7527 [2021-06-05 20:31:14,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 20:31:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2021-06-05 20:31:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 6569. [2021-06-05 20:31:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 2.4141291108404386) internal successors, (15856), 6568 states have internal predecessors, (15856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 15856 transitions. [2021-06-05 20:31:14,680 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 15856 transitions. Word has length 27 [2021-06-05 20:31:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:14,681 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 15856 transitions. [2021-06-05 20:31:14,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 15856 transitions. [2021-06-05 20:31:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:14,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:14,685 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:14,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 20:31:14,886 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:14,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:14,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1829413437, now seen corresponding path program 46 times [2021-06-05 20:31:14,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:14,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367215346] [2021-06-05 20:31:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:14,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:14,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367215346] [2021-06-05 20:31:14,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367215346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:14,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614178809] [2021-06-05 20:31:14,921 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:14,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:14,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:14,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:15,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614178809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:15,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:15,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:15,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424075777] [2021-06-05 20:31:15,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:15,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:15,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:15,037 INFO L87 Difference]: Start difference. First operand 6569 states and 15856 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:15,373 INFO L93 Difference]: Finished difference Result 8303 states and 19745 transitions. [2021-06-05 20:31:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:31:15,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:15,382 INFO L225 Difference]: With dead ends: 8303 [2021-06-05 20:31:15,382 INFO L226 Difference]: Without dead ends: 8297 [2021-06-05 20:31:15,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2021-06-05 20:31:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 6809. [2021-06-05 20:31:15,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6809 states, 6808 states have (on average 2.4159811985898942) internal successors, (16448), 6808 states have internal predecessors, (16448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6809 states to 6809 states and 16448 transitions. [2021-06-05 20:31:15,483 INFO L78 Accepts]: Start accepts. Automaton has 6809 states and 16448 transitions. Word has length 27 [2021-06-05 20:31:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:15,483 INFO L482 AbstractCegarLoop]: Abstraction has 6809 states and 16448 transitions. [2021-06-05 20:31:15,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 6809 states and 16448 transitions. [2021-06-05 20:31:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:15,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:15,488 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:15,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 20:31:15,689 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash -766676167, now seen corresponding path program 47 times [2021-06-05 20:31:15,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:15,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638888375] [2021-06-05 20:31:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:15,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638888375] [2021-06-05 20:31:15,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638888375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:15,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010048013] [2021-06-05 20:31:15,725 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:15,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 20:31:15,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:15,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:15,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:15,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010048013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:15,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:15,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:15,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945129553] [2021-06-05 20:31:15,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:15,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:15,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:15,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:15,820 INFO L87 Difference]: Start difference. First operand 6809 states and 16448 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:16,320 INFO L93 Difference]: Finished difference Result 8107 states and 19029 transitions. [2021-06-05 20:31:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 20:31:16,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:16,328 INFO L225 Difference]: With dead ends: 8107 [2021-06-05 20:31:16,328 INFO L226 Difference]: Without dead ends: 8104 [2021-06-05 20:31:16,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 20:31:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8104 states. [2021-06-05 20:31:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8104 to 6516. [2021-06-05 20:31:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6516 states, 6515 states have (on average 2.399846508058327) internal successors, (15635), 6515 states have internal predecessors, (15635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6516 states to 6516 states and 15635 transitions. [2021-06-05 20:31:16,424 INFO L78 Accepts]: Start accepts. Automaton has 6516 states and 15635 transitions. Word has length 27 [2021-06-05 20:31:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:16,424 INFO L482 AbstractCegarLoop]: Abstraction has 6516 states and 15635 transitions. [2021-06-05 20:31:16,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:16,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6516 states and 15635 transitions. [2021-06-05 20:31:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:16,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:16,430 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:16,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 20:31:16,631 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:16,631 INFO L82 PathProgramCache]: Analyzing trace with hash -414949415, now seen corresponding path program 48 times [2021-06-05 20:31:16,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:16,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156359207] [2021-06-05 20:31:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:16,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:16,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156359207] [2021-06-05 20:31:16,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156359207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:16,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639287742] [2021-06-05 20:31:16,665 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:16,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 20:31:16,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:16,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:16,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:16,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639287742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:16,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:16,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 20:31:16,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646405919] [2021-06-05 20:31:16,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:16,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:16,788 INFO L87 Difference]: Start difference. First operand 6516 states and 15635 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:17,143 INFO L93 Difference]: Finished difference Result 7119 states and 16802 transitions. [2021-06-05 20:31:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:31:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:17,150 INFO L225 Difference]: With dead ends: 7119 [2021-06-05 20:31:17,150 INFO L226 Difference]: Without dead ends: 7113 [2021-06-05 20:31:17,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 20:31:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-06-05 20:31:17,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 5894. [2021-06-05 20:31:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5894 states, 5893 states have (on average 2.400644832852537) internal successors, (14147), 5893 states have internal predecessors, (14147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5894 states to 5894 states and 14147 transitions. [2021-06-05 20:31:17,229 INFO L78 Accepts]: Start accepts. Automaton has 5894 states and 14147 transitions. Word has length 27 [2021-06-05 20:31:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:17,229 INFO L482 AbstractCegarLoop]: Abstraction has 5894 states and 14147 transitions. [2021-06-05 20:31:17,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5894 states and 14147 transitions. [2021-06-05 20:31:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:17,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:17,268 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:17,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:17,469 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:17,469 INFO L82 PathProgramCache]: Analyzing trace with hash -898156963, now seen corresponding path program 49 times [2021-06-05 20:31:17,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:17,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227691534] [2021-06-05 20:31:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:17,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:17,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227691534] [2021-06-05 20:31:17,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227691534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:17,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198274991] [2021-06-05 20:31:17,513 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:17,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:17,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198274991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:17,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:17,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 20:31:17,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112942217] [2021-06-05 20:31:17,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 20:31:17,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:17,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 20:31:17,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 20:31:17,633 INFO L87 Difference]: Start difference. First operand 5894 states and 14147 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:17,993 INFO L93 Difference]: Finished difference Result 6833 states and 16077 transitions. [2021-06-05 20:31:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:31:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:18,000 INFO L225 Difference]: With dead ends: 6833 [2021-06-05 20:31:18,000 INFO L226 Difference]: Without dead ends: 6829 [2021-06-05 20:31:18,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 20:31:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2021-06-05 20:31:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 5972. [2021-06-05 20:31:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 5971 states have (on average 2.400602914084743) internal successors, (14334), 5971 states have internal predecessors, (14334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 14334 transitions. [2021-06-05 20:31:18,071 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 14334 transitions. Word has length 27 [2021-06-05 20:31:18,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:18,071 INFO L482 AbstractCegarLoop]: Abstraction has 5972 states and 14334 transitions. [2021-06-05 20:31:18,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 14334 transitions. [2021-06-05 20:31:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:18,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:18,076 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:18,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 20:31:18,276 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1800798493, now seen corresponding path program 50 times [2021-06-05 20:31:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117013719] [2021-06-05 20:31:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:18,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:18,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117013719] [2021-06-05 20:31:18,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117013719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:18,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884332040] [2021-06-05 20:31:18,309 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:18,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:18,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:18,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:18,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884332040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:18,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:18,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 20:31:18,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372899376] [2021-06-05 20:31:18,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:18,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:18,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:18,417 INFO L87 Difference]: Start difference. First operand 5972 states and 14334 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:18,823 INFO L93 Difference]: Finished difference Result 7209 states and 16949 transitions. [2021-06-05 20:31:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:31:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:18,830 INFO L225 Difference]: With dead ends: 7209 [2021-06-05 20:31:18,830 INFO L226 Difference]: Without dead ends: 7207 [2021-06-05 20:31:18,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:31:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2021-06-05 20:31:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 5960. [2021-06-05 20:31:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5960 states, 5959 states have (on average 2.4005705655311296) internal successors, (14305), 5959 states have internal predecessors, (14305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5960 states to 5960 states and 14305 transitions. [2021-06-05 20:31:18,939 INFO L78 Accepts]: Start accepts. Automaton has 5960 states and 14305 transitions. Word has length 27 [2021-06-05 20:31:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:18,939 INFO L482 AbstractCegarLoop]: Abstraction has 5960 states and 14305 transitions. [2021-06-05 20:31:18,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states and 14305 transitions. [2021-06-05 20:31:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:18,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:18,944 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:19,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:19,158 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash 170471005, now seen corresponding path program 51 times [2021-06-05 20:31:19,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:19,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230817486] [2021-06-05 20:31:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:19,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230817486] [2021-06-05 20:31:19,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230817486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787859395] [2021-06-05 20:31:19,190 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 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 [2021-06-05 20:31:19,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 20:31:19,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:19,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:19,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787859395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:19,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:19,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 20:31:19,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269070050] [2021-06-05 20:31:19,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:19,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:19,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:19,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:19,323 INFO L87 Difference]: Start difference. First operand 5960 states and 14305 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:19,826 INFO L93 Difference]: Finished difference Result 7671 states and 18014 transitions. [2021-06-05 20:31:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 20:31:19,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:19,836 INFO L225 Difference]: With dead ends: 7671 [2021-06-05 20:31:19,837 INFO L226 Difference]: Without dead ends: 7671 [2021-06-05 20:31:19,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 20:31:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2021-06-05 20:31:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 6423. [2021-06-05 20:31:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6423 states, 6422 states have (on average 2.4040797259420743) internal successors, (15439), 6422 states have internal predecessors, (15439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6423 states to 6423 states and 15439 transitions. [2021-06-05 20:31:19,960 INFO L78 Accepts]: Start accepts. Automaton has 6423 states and 15439 transitions. Word has length 27 [2021-06-05 20:31:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:19,960 INFO L482 AbstractCegarLoop]: Abstraction has 6423 states and 15439 transitions. [2021-06-05 20:31:19,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6423 states and 15439 transitions. [2021-06-05 20:31:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:19,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:19,966 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:20,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:20,185 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:20,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1525723383, now seen corresponding path program 52 times [2021-06-05 20:31:20,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:20,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011159033] [2021-06-05 20:31:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:31:20,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:20,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011159033] [2021-06-05 20:31:20,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011159033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:20,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367382901] [2021-06-05 20:31:20,213 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:20,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:20,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:20,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367382901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:20,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:20,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 20:31:20,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090575667] [2021-06-05 20:31:20,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:20,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:20,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:20,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:20,308 INFO L87 Difference]: Start difference. First operand 6423 states and 15439 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:20,677 INFO L93 Difference]: Finished difference Result 7487 states and 17614 transitions. [2021-06-05 20:31:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:31:20,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:20,685 INFO L225 Difference]: With dead ends: 7487 [2021-06-05 20:31:20,685 INFO L226 Difference]: Without dead ends: 7478 [2021-06-05 20:31:20,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 20:31:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-05 20:31:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 5692. [2021-06-05 20:31:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 2.392725355824987) internal successors, (13617), 5691 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 13617 transitions. [2021-06-05 20:31:20,773 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 13617 transitions. Word has length 27 [2021-06-05 20:31:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:20,773 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 13617 transitions. [2021-06-05 20:31:20,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 13617 transitions. [2021-06-05 20:31:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:20,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:20,779 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:21,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:21,002 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1019377117, now seen corresponding path program 53 times [2021-06-05 20:31:21,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:21,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322211167] [2021-06-05 20:31:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:21,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:21,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322211167] [2021-06-05 20:31:21,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322211167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:21,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291656872] [2021-06-05 20:31:21,038 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:21,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 20:31:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:21,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:21,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:21,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291656872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:21,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:21,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 20:31:21,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243635292] [2021-06-05 20:31:21,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 20:31:21,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:21,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 20:31:21,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 20:31:21,148 INFO L87 Difference]: Start difference. First operand 5692 states and 13617 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:21,483 INFO L93 Difference]: Finished difference Result 7031 states and 16507 transitions. [2021-06-05 20:31:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:31:21,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:21,490 INFO L225 Difference]: With dead ends: 7031 [2021-06-05 20:31:21,490 INFO L226 Difference]: Without dead ends: 7007 [2021-06-05 20:31:21,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:31:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7007 states. [2021-06-05 20:31:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7007 to 5831. [2021-06-05 20:31:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5831 states, 5830 states have (on average 2.398456260720412) internal successors, (13983), 5830 states have internal predecessors, (13983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5831 states to 5831 states and 13983 transitions. [2021-06-05 20:31:21,561 INFO L78 Accepts]: Start accepts. Automaton has 5831 states and 13983 transitions. Word has length 27 [2021-06-05 20:31:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:21,561 INFO L482 AbstractCegarLoop]: Abstraction has 5831 states and 13983 transitions. [2021-06-05 20:31:21,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5831 states and 13983 transitions. [2021-06-05 20:31:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:21,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:21,565 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:21,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:21,766 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:21,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1936909445, now seen corresponding path program 54 times [2021-06-05 20:31:21,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:21,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804064703] [2021-06-05 20:31:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:21,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:21,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804064703] [2021-06-05 20:31:21,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804064703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:21,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128337568] [2021-06-05 20:31:21,808 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:21,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 20:31:21,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:21,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:21,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:21,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128337568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:21,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:21,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 20:31:21,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634891585] [2021-06-05 20:31:21,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 20:31:21,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:21,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 20:31:21,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:31:21,941 INFO L87 Difference]: Start difference. First operand 5831 states and 13983 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:22,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:22,363 INFO L93 Difference]: Finished difference Result 7242 states and 16991 transitions. [2021-06-05 20:31:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:31:22,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:22,377 INFO L225 Difference]: With dead ends: 7242 [2021-06-05 20:31:22,378 INFO L226 Difference]: Without dead ends: 7238 [2021-06-05 20:31:22,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 20:31:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-06-05 20:31:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 6132. [2021-06-05 20:31:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.391779481324417) internal successors, (14664), 6131 states have internal predecessors, (14664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 14664 transitions. [2021-06-05 20:31:22,479 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 14664 transitions. Word has length 27 [2021-06-05 20:31:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:22,479 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 14664 transitions. [2021-06-05 20:31:22,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 14664 transitions. [2021-06-05 20:31:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:22,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:22,484 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:22,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 20:31:22,696 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:22,696 INFO L82 PathProgramCache]: Analyzing trace with hash 299087095, now seen corresponding path program 55 times [2021-06-05 20:31:22,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:22,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21254866] [2021-06-05 20:31:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:22,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:22,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21254866] [2021-06-05 20:31:22,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21254866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:22,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744091499] [2021-06-05 20:31:22,727 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:22,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:22,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:22,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744091499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:22,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:22,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 20:31:22,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955289747] [2021-06-05 20:31:22,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 20:31:22,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:22,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 20:31:22,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 20:31:22,837 INFO L87 Difference]: Start difference. First operand 6132 states and 14664 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:23,256 INFO L93 Difference]: Finished difference Result 8492 states and 19891 transitions. [2021-06-05 20:31:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 20:31:23,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:23,264 INFO L225 Difference]: With dead ends: 8492 [2021-06-05 20:31:23,265 INFO L226 Difference]: Without dead ends: 8490 [2021-06-05 20:31:23,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 20:31:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8490 states. [2021-06-05 20:31:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8490 to 7007. [2021-06-05 20:31:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 2.396089066514416) internal successors, (16787), 7006 states have internal predecessors, (16787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 16787 transitions. [2021-06-05 20:31:23,354 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 16787 transitions. Word has length 27 [2021-06-05 20:31:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:23,354 INFO L482 AbstractCegarLoop]: Abstraction has 7007 states and 16787 transitions. [2021-06-05 20:31:23,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 16787 transitions. [2021-06-05 20:31:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:23,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:23,359 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:23,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:23,559 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1207702277, now seen corresponding path program 56 times [2021-06-05 20:31:23,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:23,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167109565] [2021-06-05 20:31:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:23,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:23,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167109565] [2021-06-05 20:31:23,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167109565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:23,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531450131] [2021-06-05 20:31:23,585 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:23,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:23,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:23,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:23,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:23,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531450131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:23,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:23,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 20:31:23,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139378713] [2021-06-05 20:31:23,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:23,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:23,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:23,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:23,684 INFO L87 Difference]: Start difference. First operand 7007 states and 16787 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:24,151 INFO L93 Difference]: Finished difference Result 9905 states and 23301 transitions. [2021-06-05 20:31:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 20:31:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:24,164 INFO L225 Difference]: With dead ends: 9905 [2021-06-05 20:31:24,164 INFO L226 Difference]: Without dead ends: 9905 [2021-06-05 20:31:24,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 20:31:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9905 states. [2021-06-05 20:31:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9905 to 8467. [2021-06-05 20:31:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8467 states, 8466 states have (on average 2.394991731632412) internal successors, (20276), 8466 states have internal predecessors, (20276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8467 states to 8467 states and 20276 transitions. [2021-06-05 20:31:24,304 INFO L78 Accepts]: Start accepts. Automaton has 8467 states and 20276 transitions. Word has length 27 [2021-06-05 20:31:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:24,304 INFO L482 AbstractCegarLoop]: Abstraction has 8467 states and 20276 transitions. [2021-06-05 20:31:24,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 8467 states and 20276 transitions. [2021-06-05 20:31:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:24,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:24,309 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:24,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 20:31:24,510 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash 147550101, now seen corresponding path program 57 times [2021-06-05 20:31:24,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:24,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817339576] [2021-06-05 20:31:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:31:24,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:24,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817339576] [2021-06-05 20:31:24,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817339576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:24,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279817551] [2021-06-05 20:31:24,536 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:24,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 20:31:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:24,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279817551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:24,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:24,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 20:31:24,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445364879] [2021-06-05 20:31:24,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 20:31:24,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:24,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 20:31:24,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 20:31:24,636 INFO L87 Difference]: Start difference. First operand 8467 states and 20276 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:25,030 INFO L93 Difference]: Finished difference Result 9754 states and 22974 transitions. [2021-06-05 20:31:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:31:25,030 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:25,041 INFO L225 Difference]: With dead ends: 9754 [2021-06-05 20:31:25,041 INFO L226 Difference]: Without dead ends: 9748 [2021-06-05 20:31:25,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 20:31:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9748 states. [2021-06-05 20:31:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9748 to 8287. [2021-06-05 20:31:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8287 states, 8286 states have (on average 2.3880038619357955) internal successors, (19787), 8286 states have internal predecessors, (19787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8287 states to 8287 states and 19787 transitions. [2021-06-05 20:31:25,158 INFO L78 Accepts]: Start accepts. Automaton has 8287 states and 19787 transitions. Word has length 27 [2021-06-05 20:31:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:25,159 INFO L482 AbstractCegarLoop]: Abstraction has 8287 states and 19787 transitions. [2021-06-05 20:31:25,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8287 states and 19787 transitions. [2021-06-05 20:31:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:25,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:25,164 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:25,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:25,365 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:25,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:25,365 INFO L82 PathProgramCache]: Analyzing trace with hash -358796165, now seen corresponding path program 58 times [2021-06-05 20:31:25,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:25,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056738740] [2021-06-05 20:31:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:31:25,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:25,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056738740] [2021-06-05 20:31:25,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056738740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:25,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269976743] [2021-06-05 20:31:25,396 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:25,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:25,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:25,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:25,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:25,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269976743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:25,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:25,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 20:31:25,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604292091] [2021-06-05 20:31:25,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 20:31:25,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:25,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 20:31:25,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 20:31:25,528 INFO L87 Difference]: Start difference. First operand 8287 states and 19787 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:25,938 INFO L93 Difference]: Finished difference Result 9921 states and 23343 transitions. [2021-06-05 20:31:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:31:25,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:25,948 INFO L225 Difference]: With dead ends: 9921 [2021-06-05 20:31:25,948 INFO L226 Difference]: Without dead ends: 9897 [2021-06-05 20:31:25,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 20:31:25,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2021-06-05 20:31:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 8623. [2021-06-05 20:31:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8623 states, 8622 states have (on average 2.38842495940617) internal successors, (20593), 8622 states have internal predecessors, (20593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8623 states to 8623 states and 20593 transitions. [2021-06-05 20:31:26,066 INFO L78 Accepts]: Start accepts. Automaton has 8623 states and 20593 transitions. Word has length 27 [2021-06-05 20:31:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:26,066 INFO L482 AbstractCegarLoop]: Abstraction has 8623 states and 20593 transitions. [2021-06-05 20:31:26,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 8623 states and 20593 transitions. [2021-06-05 20:31:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:31:26,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:26,072 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:26,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:26,295 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1382539993, now seen corresponding path program 59 times [2021-06-05 20:31:26,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:26,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024963231] [2021-06-05 20:31:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:26,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:26,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024963231] [2021-06-05 20:31:26,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024963231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:26,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190790874] [2021-06-05 20:31:26,330 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:26,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 20:31:26,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:26,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:31:26,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:26,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190790874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:26,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:26,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 20:31:26,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222841180] [2021-06-05 20:31:26,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 20:31:26,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:26,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 20:31:26,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:31:26,477 INFO L87 Difference]: Start difference. First operand 8623 states and 20593 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:26,788 INFO L93 Difference]: Finished difference Result 10314 states and 24325 transitions. [2021-06-05 20:31:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 20:31:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 20:31:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:26,799 INFO L225 Difference]: With dead ends: 10314 [2021-06-05 20:31:26,799 INFO L226 Difference]: Without dead ends: 10272 [2021-06-05 20:31:26,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 20:31:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10272 states. [2021-06-05 20:31:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10272 to 9112. [2021-06-05 20:31:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9112 states, 9111 states have (on average 2.388541323674679) internal successors, (21762), 9111 states have internal predecessors, (21762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 21762 transitions. [2021-06-05 20:31:26,913 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 21762 transitions. Word has length 27 [2021-06-05 20:31:26,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:26,913 INFO L482 AbstractCegarLoop]: Abstraction has 9112 states and 21762 transitions. [2021-06-05 20:31:26,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 21762 transitions. [2021-06-05 20:31:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 20:31:26,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:26,921 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:27,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:27,121 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:27,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1072615692, now seen corresponding path program 60 times [2021-06-05 20:31:27,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:27,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120863959] [2021-06-05 20:31:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:27,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120863959] [2021-06-05 20:31:27,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120863959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071868270] [2021-06-05 20:31:27,159 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:27,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 20:31:27,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:27,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 20:31:27,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:27,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071868270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:27,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:27,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 20:31:27,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681166619] [2021-06-05 20:31:27,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:31:27,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:27,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:31:27,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:31:27,221 INFO L87 Difference]: Start difference. First operand 9112 states and 21762 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:27,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:27,264 INFO L93 Difference]: Finished difference Result 10611 states and 25338 transitions. [2021-06-05 20:31:27,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:31:27,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 20:31:27,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:27,275 INFO L225 Difference]: With dead ends: 10611 [2021-06-05 20:31:27,275 INFO L226 Difference]: Without dead ends: 10581 [2021-06-05 20:31:27,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:31:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10581 states. [2021-06-05 20:31:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10581 to 9513. [2021-06-05 20:31:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9513 states, 9512 states have (on average 2.390138772077376) internal successors, (22735), 9512 states have internal predecessors, (22735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9513 states to 9513 states and 22735 transitions. [2021-06-05 20:31:27,428 INFO L78 Accepts]: Start accepts. Automaton has 9513 states and 22735 transitions. Word has length 30 [2021-06-05 20:31:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:27,428 INFO L482 AbstractCegarLoop]: Abstraction has 9513 states and 22735 transitions. [2021-06-05 20:31:27,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 9513 states and 22735 transitions. [2021-06-05 20:31:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 20:31:27,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:27,435 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:27,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:27,636 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash -541645990, now seen corresponding path program 61 times [2021-06-05 20:31:27,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:27,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390429096] [2021-06-05 20:31:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:31:27,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:27,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390429096] [2021-06-05 20:31:27,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390429096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:27,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687596377] [2021-06-05 20:31:27,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:27,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 20:31:27,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:31:27,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687596377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:27,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:27,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 20:31:27,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696341689] [2021-06-05 20:31:27,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:31:27,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:27,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:31:27,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:31:27,753 INFO L87 Difference]: Start difference. First operand 9513 states and 22735 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:27,816 INFO L93 Difference]: Finished difference Result 12295 states and 29532 transitions. [2021-06-05 20:31:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:31:27,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 20:31:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:27,834 INFO L225 Difference]: With dead ends: 12295 [2021-06-05 20:31:27,834 INFO L226 Difference]: Without dead ends: 12259 [2021-06-05 20:31:27,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:31:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12259 states. [2021-06-05 20:31:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12259 to 10001. [2021-06-05 20:31:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10001 states, 10000 states have (on average 2.4045) internal successors, (24045), 10000 states have internal predecessors, (24045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 24045 transitions. [2021-06-05 20:31:28,020 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 24045 transitions. Word has length 30 [2021-06-05 20:31:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:28,020 INFO L482 AbstractCegarLoop]: Abstraction has 10001 states and 24045 transitions. [2021-06-05 20:31:28,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 24045 transitions. [2021-06-05 20:31:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 20:31:28,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:28,031 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:28,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 20:31:28,246 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1911465064, now seen corresponding path program 62 times [2021-06-05 20:31:28,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:28,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021377457] [2021-06-05 20:31:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:31:28,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:28,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021377457] [2021-06-05 20:31:28,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021377457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:28,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469558181] [2021-06-05 20:31:28,278 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:28,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:28,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 20:31:28,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:31:28,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469558181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:28,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:28,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 20:31:28,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620131122] [2021-06-05 20:31:28,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:31:28,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:28,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:31:28,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:31:28,340 INFO L87 Difference]: Start difference. First operand 10001 states and 24045 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:28,394 INFO L93 Difference]: Finished difference Result 14193 states and 34282 transitions. [2021-06-05 20:31:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:31:28,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 20:31:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:28,411 INFO L225 Difference]: With dead ends: 14193 [2021-06-05 20:31:28,411 INFO L226 Difference]: Without dead ends: 14160 [2021-06-05 20:31:28,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:31:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2021-06-05 20:31:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 11674. [2021-06-05 20:31:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11674 states, 11673 states have (on average 2.424226848282361) internal successors, (28298), 11673 states have internal predecessors, (28298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11674 states to 11674 states and 28298 transitions. [2021-06-05 20:31:28,572 INFO L78 Accepts]: Start accepts. Automaton has 11674 states and 28298 transitions. Word has length 30 [2021-06-05 20:31:28,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:28,572 INFO L482 AbstractCegarLoop]: Abstraction has 11674 states and 28298 transitions. [2021-06-05 20:31:28,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11674 states and 28298 transitions. [2021-06-05 20:31:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 20:31:28,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:28,581 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:28,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:28,781 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:28,782 INFO L82 PathProgramCache]: Analyzing trace with hash 587747994, now seen corresponding path program 63 times [2021-06-05 20:31:28,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:28,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083014469] [2021-06-05 20:31:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:31:28,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:28,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083014469] [2021-06-05 20:31:28,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083014469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:28,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573100032] [2021-06-05 20:31:28,821 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:28,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 20:31:28,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 20:31:28,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:31:28,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573100032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:28,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:28,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 20:31:28,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090807779] [2021-06-05 20:31:28,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:31:28,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:28,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:31:28,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:31:28,887 INFO L87 Difference]: Start difference. First operand 11674 states and 28298 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:28,984 INFO L93 Difference]: Finished difference Result 16136 states and 39070 transitions. [2021-06-05 20:31:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:31:28,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 20:31:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:29,000 INFO L225 Difference]: With dead ends: 16136 [2021-06-05 20:31:29,000 INFO L226 Difference]: Without dead ends: 16112 [2021-06-05 20:31:29,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:31:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16112 states. [2021-06-05 20:31:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16112 to 15897. [2021-06-05 20:31:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15897 states, 15896 states have (on average 2.4291016607951685) internal successors, (38613), 15896 states have internal predecessors, (38613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 38613 transitions. [2021-06-05 20:31:29,198 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 38613 transitions. Word has length 30 [2021-06-05 20:31:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:29,198 INFO L482 AbstractCegarLoop]: Abstraction has 15897 states and 38613 transitions. [2021-06-05 20:31:29,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:29,198 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 38613 transitions. [2021-06-05 20:31:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:29,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:29,213 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:29,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:29,413 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash 219292495, now seen corresponding path program 64 times [2021-06-05 20:31:29,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:29,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487105419] [2021-06-05 20:31:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:29,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:29,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487105419] [2021-06-05 20:31:29,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487105419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:29,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515506530] [2021-06-05 20:31:29,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:29,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:29,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:29,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:29,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:29,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515506530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:29,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:29,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 20:31:29,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252458215] [2021-06-05 20:31:29,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 20:31:29,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 20:31:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:31:29,575 INFO L87 Difference]: Start difference. First operand 15897 states and 38613 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:29,859 INFO L93 Difference]: Finished difference Result 20455 states and 49641 transitions. [2021-06-05 20:31:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:31:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:29,883 INFO L225 Difference]: With dead ends: 20455 [2021-06-05 20:31:29,883 INFO L226 Difference]: Without dead ends: 20455 [2021-06-05 20:31:29,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:31:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20455 states. [2021-06-05 20:31:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20455 to 16120. [2021-06-05 20:31:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16120 states, 16119 states have (on average 2.4278801414479805) internal successors, (39135), 16119 states have internal predecessors, (39135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16120 states to 16120 states and 39135 transitions. [2021-06-05 20:31:30,192 INFO L78 Accepts]: Start accepts. Automaton has 16120 states and 39135 transitions. Word has length 33 [2021-06-05 20:31:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:30,192 INFO L482 AbstractCegarLoop]: Abstraction has 16120 states and 39135 transitions. [2021-06-05 20:31:30,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 16120 states and 39135 transitions. [2021-06-05 20:31:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:30,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:30,207 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:30,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 20:31:30,408 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1189526595, now seen corresponding path program 65 times [2021-06-05 20:31:30,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:30,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075328192] [2021-06-05 20:31:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:30,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:30,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075328192] [2021-06-05 20:31:30,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075328192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:30,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879667673] [2021-06-05 20:31:30,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:30,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 20:31:30,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:30,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:30,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:30,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879667673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:30,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:30,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 20:31:30,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487788855] [2021-06-05 20:31:30,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 20:31:30,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:30,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 20:31:30,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:31:30,600 INFO L87 Difference]: Start difference. First operand 16120 states and 39135 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:30,795 INFO L93 Difference]: Finished difference Result 24604 states and 59046 transitions. [2021-06-05 20:31:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:31:30,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:30,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:30,825 INFO L225 Difference]: With dead ends: 24604 [2021-06-05 20:31:30,825 INFO L226 Difference]: Without dead ends: 24569 [2021-06-05 20:31:30,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:31:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24569 states. [2021-06-05 20:31:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24569 to 16120. [2021-06-05 20:31:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16120 states, 16119 states have (on average 2.427756064271977) internal successors, (39133), 16119 states have internal predecessors, (39133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16120 states to 16120 states and 39133 transitions. [2021-06-05 20:31:31,089 INFO L78 Accepts]: Start accepts. Automaton has 16120 states and 39133 transitions. Word has length 33 [2021-06-05 20:31:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:31,089 INFO L482 AbstractCegarLoop]: Abstraction has 16120 states and 39133 transitions. [2021-06-05 20:31:31,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 16120 states and 39133 transitions. [2021-06-05 20:31:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:31,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:31,105 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:31,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:31,305 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:31,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1806285095, now seen corresponding path program 66 times [2021-06-05 20:31:31,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:31,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509841120] [2021-06-05 20:31:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:31,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509841120] [2021-06-05 20:31:31,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509841120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000160215] [2021-06-05 20:31:31,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:31,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:31:31,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:31,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:31,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:31,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000160215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:31,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:31,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:31,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793112935] [2021-06-05 20:31:31,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:31,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:31,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:31,493 INFO L87 Difference]: Start difference. First operand 16120 states and 39133 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:32,390 INFO L93 Difference]: Finished difference Result 29053 states and 69475 transitions. [2021-06-05 20:31:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 20:31:32,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:32,427 INFO L225 Difference]: With dead ends: 29053 [2021-06-05 20:31:32,427 INFO L226 Difference]: Without dead ends: 29043 [2021-06-05 20:31:32,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 655.9ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:31:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29043 states. [2021-06-05 20:31:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29043 to 20414. [2021-06-05 20:31:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20414 states, 20413 states have (on average 2.4425121246264636) internal successors, (49859), 20413 states have internal predecessors, (49859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20414 states to 20414 states and 49859 transitions. [2021-06-05 20:31:32,788 INFO L78 Accepts]: Start accepts. Automaton has 20414 states and 49859 transitions. Word has length 33 [2021-06-05 20:31:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:32,788 INFO L482 AbstractCegarLoop]: Abstraction has 20414 states and 49859 transitions. [2021-06-05 20:31:32,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 20414 states and 49859 transitions. [2021-06-05 20:31:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:32,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:32,804 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:33,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 20:31:33,005 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:33,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1793330135, now seen corresponding path program 67 times [2021-06-05 20:31:33,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:33,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067339231] [2021-06-05 20:31:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:33,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:33,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067339231] [2021-06-05 20:31:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067339231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:33,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388280321] [2021-06-05 20:31:33,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:33,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:33,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:33,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388280321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:33,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:33,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:33,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319728427] [2021-06-05 20:31:33,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:33,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:33,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:33,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:33,177 INFO L87 Difference]: Start difference. First operand 20414 states and 49859 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:33,812 INFO L93 Difference]: Finished difference Result 23900 states and 57743 transitions. [2021-06-05 20:31:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 20:31:33,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:33,838 INFO L225 Difference]: With dead ends: 23900 [2021-06-05 20:31:33,838 INFO L226 Difference]: Without dead ends: 23896 [2021-06-05 20:31:33,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=876, Invalid=1674, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:31:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23896 states. [2021-06-05 20:31:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23896 to 21251. [2021-06-05 20:31:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21251 states, 21250 states have (on average 2.448) internal successors, (52020), 21250 states have internal predecessors, (52020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21251 states to 21251 states and 52020 transitions. [2021-06-05 20:31:34,170 INFO L78 Accepts]: Start accepts. Automaton has 21251 states and 52020 transitions. Word has length 33 [2021-06-05 20:31:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:34,170 INFO L482 AbstractCegarLoop]: Abstraction has 21251 states and 52020 transitions. [2021-06-05 20:31:34,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 21251 states and 52020 transitions. [2021-06-05 20:31:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:34,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:34,187 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:34,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 20:31:34,388 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash -802759469, now seen corresponding path program 68 times [2021-06-05 20:31:34,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:34,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626614241] [2021-06-05 20:31:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:34,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:34,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626614241] [2021-06-05 20:31:34,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626614241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:34,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089862879] [2021-06-05 20:31:34,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:34,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:34,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:34,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089862879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:34,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:34,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:34,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604206277] [2021-06-05 20:31:34,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:34,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:34,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:34,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:34,554 INFO L87 Difference]: Start difference. First operand 21251 states and 52020 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:35,367 INFO L93 Difference]: Finished difference Result 24375 states and 58715 transitions. [2021-06-05 20:31:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 20:31:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:35,393 INFO L225 Difference]: With dead ends: 24375 [2021-06-05 20:31:35,393 INFO L226 Difference]: Without dead ends: 24375 [2021-06-05 20:31:35,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 563.3ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:31:35,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24375 states. [2021-06-05 20:31:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24375 to 19878. [2021-06-05 20:31:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19878 states, 19877 states have (on average 2.442923982492328) internal successors, (48558), 19877 states have internal predecessors, (48558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19878 states to 19878 states and 48558 transitions. [2021-06-05 20:31:35,733 INFO L78 Accepts]: Start accepts. Automaton has 19878 states and 48558 transitions. Word has length 33 [2021-06-05 20:31:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:35,733 INFO L482 AbstractCegarLoop]: Abstraction has 19878 states and 48558 transitions. [2021-06-05 20:31:35,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 19878 states and 48558 transitions. [2021-06-05 20:31:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:35,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:35,749 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:35,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:35,950 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash -451032717, now seen corresponding path program 69 times [2021-06-05 20:31:35,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:35,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474319235] [2021-06-05 20:31:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:36,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:36,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474319235] [2021-06-05 20:31:36,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474319235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:36,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113940261] [2021-06-05 20:31:36,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:36,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 20:31:36,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:36,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:36,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113940261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:36,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:36,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:36,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069352092] [2021-06-05 20:31:36,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:36,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:36,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:36,136 INFO L87 Difference]: Start difference. First operand 19878 states and 48558 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:36,816 INFO L93 Difference]: Finished difference Result 28185 states and 67521 transitions. [2021-06-05 20:31:36,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 20:31:36,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:36,857 INFO L225 Difference]: With dead ends: 28185 [2021-06-05 20:31:36,857 INFO L226 Difference]: Without dead ends: 28179 [2021-06-05 20:31:36,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:31:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28179 states. [2021-06-05 20:31:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28179 to 17968. [2021-06-05 20:31:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.4288974230533755) internal successors, (43640), 17967 states have internal predecessors, (43640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 43640 transitions. [2021-06-05 20:31:37,270 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 43640 transitions. Word has length 33 [2021-06-05 20:31:37,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:37,270 INFO L482 AbstractCegarLoop]: Abstraction has 17968 states and 43640 transitions. [2021-06-05 20:31:37,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 43640 transitions. [2021-06-05 20:31:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:37,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:37,286 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:37,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:37,487 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash -957378983, now seen corresponding path program 70 times [2021-06-05 20:31:37,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:37,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426146670] [2021-06-05 20:31:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:37,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:37,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426146670] [2021-06-05 20:31:37,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426146670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:37,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369377324] [2021-06-05 20:31:37,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:37,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:37,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:37,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:37,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:37,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369377324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:37,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:37,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:37,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632429128] [2021-06-05 20:31:37,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:37,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:37,690 INFO L87 Difference]: Start difference. First operand 17968 states and 43640 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:38,235 INFO L93 Difference]: Finished difference Result 26897 states and 64354 transitions. [2021-06-05 20:31:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 20:31:38,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:38,268 INFO L225 Difference]: With dead ends: 26897 [2021-06-05 20:31:38,269 INFO L226 Difference]: Without dead ends: 26873 [2021-06-05 20:31:38,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 20:31:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26873 states. [2021-06-05 20:31:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26873 to 18288. [2021-06-05 20:31:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18288 states, 18287 states have (on average 2.4269699786733745) internal successors, (44382), 18287 states have internal predecessors, (44382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18288 states to 18288 states and 44382 transitions. [2021-06-05 20:31:38,573 INFO L78 Accepts]: Start accepts. Automaton has 18288 states and 44382 transitions. Word has length 33 [2021-06-05 20:31:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:38,573 INFO L482 AbstractCegarLoop]: Abstraction has 18288 states and 44382 transitions. [2021-06-05 20:31:38,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 18288 states and 44382 transitions. [2021-06-05 20:31:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:38,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:38,587 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:38,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:38,788 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash 783957175, now seen corresponding path program 71 times [2021-06-05 20:31:38,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:38,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096303070] [2021-06-05 20:31:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:38,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:38,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096303070] [2021-06-05 20:31:38,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096303070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:38,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981982414] [2021-06-05 20:31:38,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:38,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 20:31:38,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:38,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:38,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981982414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:38,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:38,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:38,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867984865] [2021-06-05 20:31:38,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:38,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:38,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:38,971 INFO L87 Difference]: Start difference. First operand 18288 states and 44382 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:39,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:39,460 INFO L93 Difference]: Finished difference Result 27620 states and 66056 transitions. [2021-06-05 20:31:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 20:31:39,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:39,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:39,495 INFO L225 Difference]: With dead ends: 27620 [2021-06-05 20:31:39,495 INFO L226 Difference]: Without dead ends: 27578 [2021-06-05 20:31:39,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 20:31:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27578 states. [2021-06-05 20:31:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27578 to 18474. [2021-06-05 20:31:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18474 states, 18473 states have (on average 2.426081307854707) internal successors, (44817), 18473 states have internal predecessors, (44817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18474 states to 18474 states and 44817 transitions. [2021-06-05 20:31:39,824 INFO L78 Accepts]: Start accepts. Automaton has 18474 states and 44817 transitions. Word has length 33 [2021-06-05 20:31:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:39,824 INFO L482 AbstractCegarLoop]: Abstraction has 18474 states and 44817 transitions. [2021-06-05 20:31:39,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 18474 states and 44817 transitions. [2021-06-05 20:31:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:39,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:39,840 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:40,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:40,040 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1980528231, now seen corresponding path program 72 times [2021-06-05 20:31:40,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:40,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262344355] [2021-06-05 20:31:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:40,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:40,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262344355] [2021-06-05 20:31:40,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262344355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:40,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264464756] [2021-06-05 20:31:40,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:40,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 20:31:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:40,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264464756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:40,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:40,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:40,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299683737] [2021-06-05 20:31:40,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:40,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:40,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:40,204 INFO L87 Difference]: Start difference. First operand 18474 states and 44817 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:40,538 INFO L93 Difference]: Finished difference Result 25842 states and 61833 transitions. [2021-06-05 20:31:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 20:31:40,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:40,572 INFO L225 Difference]: With dead ends: 25842 [2021-06-05 20:31:40,572 INFO L226 Difference]: Without dead ends: 25812 [2021-06-05 20:31:40,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 20:31:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25812 states. [2021-06-05 20:31:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25812 to 18474. [2021-06-05 20:31:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18474 states, 18473 states have (on average 2.425431711145997) internal successors, (44805), 18473 states have internal predecessors, (44805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18474 states to 18474 states and 44805 transitions. [2021-06-05 20:31:40,971 INFO L78 Accepts]: Start accepts. Automaton has 18474 states and 44805 transitions. Word has length 33 [2021-06-05 20:31:40,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:40,971 INFO L482 AbstractCegarLoop]: Abstraction has 18474 states and 44805 transitions. [2021-06-05 20:31:40,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 18474 states and 44805 transitions. [2021-06-05 20:31:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:40,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:40,987 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:41,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:41,187 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:41,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1526198683, now seen corresponding path program 73 times [2021-06-05 20:31:41,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:41,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322087736] [2021-06-05 20:31:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:41,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:41,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322087736] [2021-06-05 20:31:41,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322087736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:41,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125383315] [2021-06-05 20:31:41,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 20:31:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:41,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:41,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125383315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:41,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:41,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 20:31:41,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624125880] [2021-06-05 20:31:41,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 20:31:41,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:41,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 20:31:41,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 20:31:41,393 INFO L87 Difference]: Start difference. First operand 18474 states and 44805 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:42,000 INFO L93 Difference]: Finished difference Result 22066 states and 52977 transitions. [2021-06-05 20:31:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 20:31:42,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:42,026 INFO L225 Difference]: With dead ends: 22066 [2021-06-05 20:31:42,026 INFO L226 Difference]: Without dead ends: 22046 [2021-06-05 20:31:42,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=973, Invalid=2107, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:31:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22046 states. [2021-06-05 20:31:42,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22046 to 19236. [2021-06-05 20:31:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19236 states, 19235 states have (on average 2.4252144528203794) internal successors, (46649), 19235 states have internal predecessors, (46649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19236 states to 19236 states and 46649 transitions. [2021-06-05 20:31:42,341 INFO L78 Accepts]: Start accepts. Automaton has 19236 states and 46649 transitions. Word has length 33 [2021-06-05 20:31:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:42,341 INFO L482 AbstractCegarLoop]: Abstraction has 19236 states and 46649 transitions. [2021-06-05 20:31:42,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 19236 states and 46649 transitions. [2021-06-05 20:31:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:42,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:42,357 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:42,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 20:31:42,558 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:42,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1340292325, now seen corresponding path program 74 times [2021-06-05 20:31:42,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:42,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836043133] [2021-06-05 20:31:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:42,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:42,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836043133] [2021-06-05 20:31:42,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836043133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:42,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636357730] [2021-06-05 20:31:42,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:42,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:42,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:42,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:42,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:42,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636357730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:42,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:42,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 20:31:42,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340339797] [2021-06-05 20:31:42,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:42,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:42,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:42,737 INFO L87 Difference]: Start difference. First operand 19236 states and 46649 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:43,506 INFO L93 Difference]: Finished difference Result 22673 states and 54112 transitions. [2021-06-05 20:31:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 20:31:43,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:43,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:43,531 INFO L225 Difference]: With dead ends: 22673 [2021-06-05 20:31:43,531 INFO L226 Difference]: Without dead ends: 22661 [2021-06-05 20:31:43,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:31:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22661 states. [2021-06-05 20:31:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22661 to 17519. [2021-06-05 20:31:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17519 states, 17518 states have (on average 2.4243635118164173) internal successors, (42470), 17518 states have internal predecessors, (42470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 42470 transitions. [2021-06-05 20:31:43,829 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 42470 transitions. Word has length 33 [2021-06-05 20:31:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:43,829 INFO L482 AbstractCegarLoop]: Abstraction has 17519 states and 42470 transitions. [2021-06-05 20:31:43,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 42470 transitions. [2021-06-05 20:31:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:43,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:43,844 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:44,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:44,045 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash 492503059, now seen corresponding path program 75 times [2021-06-05 20:31:44,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:44,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749469054] [2021-06-05 20:31:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:44,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:44,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749469054] [2021-06-05 20:31:44,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749469054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:44,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503825854] [2021-06-05 20:31:44,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:44,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 20:31:44,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:44,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:44,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503825854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:44,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:44,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 20:31:44,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928056488] [2021-06-05 20:31:44,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:31:44,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:44,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:31:44,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:31:44,235 INFO L87 Difference]: Start difference. First operand 17519 states and 42470 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:44,909 INFO L93 Difference]: Finished difference Result 22452 states and 53652 transitions. [2021-06-05 20:31:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 20:31:44,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:44,935 INFO L225 Difference]: With dead ends: 22452 [2021-06-05 20:31:44,935 INFO L226 Difference]: Without dead ends: 22406 [2021-06-05 20:31:44,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=996, Invalid=2426, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 20:31:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22406 states. [2021-06-05 20:31:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22406 to 18251. [2021-06-05 20:31:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18251 states, 18250 states have (on average 2.4206575342465753) internal successors, (44177), 18250 states have internal predecessors, (44177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18251 states to 18251 states and 44177 transitions. [2021-06-05 20:31:45,333 INFO L78 Accepts]: Start accepts. Automaton has 18251 states and 44177 transitions. Word has length 33 [2021-06-05 20:31:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:45,334 INFO L482 AbstractCegarLoop]: Abstraction has 18251 states and 44177 transitions. [2021-06-05 20:31:45,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 18251 states and 44177 transitions. [2021-06-05 20:31:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:45,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:45,349 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:45,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:45,550 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:45,550 INFO L82 PathProgramCache]: Analyzing trace with hash -952018289, now seen corresponding path program 76 times [2021-06-05 20:31:45,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:45,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905165733] [2021-06-05 20:31:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:45,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:45,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905165733] [2021-06-05 20:31:45,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905165733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:45,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009980826] [2021-06-05 20:31:45,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:45,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:45,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:45,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:45,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:45,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009980826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:45,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:45,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 20:31:45,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158432355] [2021-06-05 20:31:45,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:45,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:45,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:45,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:45,726 INFO L87 Difference]: Start difference. First operand 18251 states and 44177 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:46,631 INFO L93 Difference]: Finished difference Result 23972 states and 57036 transitions. [2021-06-05 20:31:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 20:31:46,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:46,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:46,660 INFO L225 Difference]: With dead ends: 23972 [2021-06-05 20:31:46,660 INFO L226 Difference]: Without dead ends: 23957 [2021-06-05 20:31:46,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 678.2ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 20:31:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23957 states. [2021-06-05 20:31:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23957 to 19212. [2021-06-05 20:31:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19212 states, 19211 states have (on average 2.422882723439696) internal successors, (46546), 19211 states have internal predecessors, (46546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19212 states to 19212 states and 46546 transitions. [2021-06-05 20:31:47,004 INFO L78 Accepts]: Start accepts. Automaton has 19212 states and 46546 transitions. Word has length 33 [2021-06-05 20:31:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:47,005 INFO L482 AbstractCegarLoop]: Abstraction has 19212 states and 46546 transitions. [2021-06-05 20:31:47,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 19212 states and 46546 transitions. [2021-06-05 20:31:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:47,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:47,021 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:47,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 20:31:47,225 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:47,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1504020389, now seen corresponding path program 77 times [2021-06-05 20:31:47,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:47,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701939070] [2021-06-05 20:31:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:47,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:47,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701939070] [2021-06-05 20:31:47,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701939070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:47,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30385866] [2021-06-05 20:31:47,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:47,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 20:31:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:47,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:47,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:47,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30385866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:47,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:47,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:31:47,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717246196] [2021-06-05 20:31:47,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:31:47,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:47,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:31:47,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:31:47,479 INFO L87 Difference]: Start difference. First operand 19212 states and 46546 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:48,243 INFO L93 Difference]: Finished difference Result 24404 states and 58210 transitions. [2021-06-05 20:31:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 20:31:48,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:48,272 INFO L225 Difference]: With dead ends: 24404 [2021-06-05 20:31:48,272 INFO L226 Difference]: Without dead ends: 24340 [2021-06-05 20:31:48,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 604.1ms TimeCoverageRelationStatistics Valid=1034, Invalid=2748, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:31:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24340 states. [2021-06-05 20:31:48,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24340 to 20582. [2021-06-05 20:31:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20582 states, 20581 states have (on average 2.418395607599242) internal successors, (49773), 20581 states have internal predecessors, (49773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20582 states to 20582 states and 49773 transitions. [2021-06-05 20:31:48,650 INFO L78 Accepts]: Start accepts. Automaton has 20582 states and 49773 transitions. Word has length 33 [2021-06-05 20:31:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:48,650 INFO L482 AbstractCegarLoop]: Abstraction has 20582 states and 49773 transitions. [2021-06-05 20:31:48,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 20582 states and 49773 transitions. [2021-06-05 20:31:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:48,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:48,666 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:48,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:48,867 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:48,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1197513563, now seen corresponding path program 78 times [2021-06-05 20:31:48,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:48,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279424904] [2021-06-05 20:31:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:48,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:48,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279424904] [2021-06-05 20:31:48,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279424904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:48,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899877461] [2021-06-05 20:31:48,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:48,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:31:48,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:48,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:48,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:49,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899877461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:49,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:49,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 20:31:49,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118284408] [2021-06-05 20:31:49,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:49,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:49,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:49,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:49,077 INFO L87 Difference]: Start difference. First operand 20582 states and 49773 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:49,972 INFO L93 Difference]: Finished difference Result 29066 states and 69261 transitions. [2021-06-05 20:31:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 20:31:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:50,011 INFO L225 Difference]: With dead ends: 29066 [2021-06-05 20:31:50,011 INFO L226 Difference]: Without dead ends: 29054 [2021-06-05 20:31:50,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 20:31:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29054 states. [2021-06-05 20:31:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29054 to 24272. [2021-06-05 20:31:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24272 states, 24271 states have (on average 2.411890733797536) internal successors, (58539), 24271 states have internal predecessors, (58539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24272 states to 24272 states and 58539 transitions. [2021-06-05 20:31:50,409 INFO L78 Accepts]: Start accepts. Automaton has 24272 states and 58539 transitions. Word has length 33 [2021-06-05 20:31:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:50,409 INFO L482 AbstractCegarLoop]: Abstraction has 24272 states and 58539 transitions. [2021-06-05 20:31:50,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24272 states and 58539 transitions. [2021-06-05 20:31:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:50,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:50,427 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:50,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:50,628 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash -635657063, now seen corresponding path program 79 times [2021-06-05 20:31:50,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:50,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153829867] [2021-06-05 20:31:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:50,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:50,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153829867] [2021-06-05 20:31:50,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153829867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:50,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276890600] [2021-06-05 20:31:50,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:50,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:50,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:50,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276890600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:50,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:50,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 20:31:50,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756065932] [2021-06-05 20:31:50,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 20:31:50,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:50,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 20:31:50,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:31:50,774 INFO L87 Difference]: Start difference. First operand 24272 states and 58539 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:51,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:51,028 INFO L93 Difference]: Finished difference Result 27352 states and 65734 transitions. [2021-06-05 20:31:51,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:31:51,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:51,061 INFO L225 Difference]: With dead ends: 27352 [2021-06-05 20:31:51,062 INFO L226 Difference]: Without dead ends: 27352 [2021-06-05 20:31:51,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:31:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27352 states. [2021-06-05 20:31:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27352 to 24467. [2021-06-05 20:31:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24467 states, 24466 states have (on average 2.412245565274258) internal successors, (59018), 24466 states have internal predecessors, (59018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24467 states to 24467 states and 59018 transitions. [2021-06-05 20:31:51,468 INFO L78 Accepts]: Start accepts. Automaton has 24467 states and 59018 transitions. Word has length 33 [2021-06-05 20:31:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:51,468 INFO L482 AbstractCegarLoop]: Abstraction has 24467 states and 59018 transitions. [2021-06-05 20:31:51,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24467 states and 59018 transitions. [2021-06-05 20:31:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:51,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:51,486 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:51,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:51,687 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash 275676541, now seen corresponding path program 80 times [2021-06-05 20:31:51,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:51,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152800445] [2021-06-05 20:31:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:51,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:51,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152800445] [2021-06-05 20:31:51,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152800445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:51,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670229601] [2021-06-05 20:31:51,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:51,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:31:51,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:51,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670229601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:51,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:51,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 20:31:51,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227349596] [2021-06-05 20:31:51,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 20:31:51,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:51,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 20:31:51,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:31:51,926 INFO L87 Difference]: Start difference. First operand 24467 states and 59018 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:52,137 INFO L93 Difference]: Finished difference Result 29499 states and 70438 transitions. [2021-06-05 20:31:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 20:31:52,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:52,180 INFO L225 Difference]: With dead ends: 29499 [2021-06-05 20:31:52,180 INFO L226 Difference]: Without dead ends: 29477 [2021-06-05 20:31:52,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:31:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29477 states. [2021-06-05 20:31:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29477 to 24467. [2021-06-05 20:31:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24467 states, 24466 states have (on average 2.4122046922259464) internal successors, (59017), 24466 states have internal predecessors, (59017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24467 states to 24467 states and 59017 transitions. [2021-06-05 20:31:52,596 INFO L78 Accepts]: Start accepts. Automaton has 24467 states and 59017 transitions. Word has length 33 [2021-06-05 20:31:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:52,596 INFO L482 AbstractCegarLoop]: Abstraction has 24467 states and 59017 transitions. [2021-06-05 20:31:52,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 24467 states and 59017 transitions. [2021-06-05 20:31:52,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:52,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:52,616 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:52,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 20:31:52,817 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:52,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:52,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1225763209, now seen corresponding path program 81 times [2021-06-05 20:31:52,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:52,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828164036] [2021-06-05 20:31:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:52,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:52,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828164036] [2021-06-05 20:31:52,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828164036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:52,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856040228] [2021-06-05 20:31:52,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:52,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 20:31:52,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:52,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:52,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:53,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856040228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:53,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:53,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:53,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132638576] [2021-06-05 20:31:53,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:53,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:53,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:53,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:53,014 INFO L87 Difference]: Start difference. First operand 24467 states and 59017 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:53,382 INFO L93 Difference]: Finished difference Result 26726 states and 63944 transitions. [2021-06-05 20:31:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 20:31:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:53,415 INFO L225 Difference]: With dead ends: 26726 [2021-06-05 20:31:53,415 INFO L226 Difference]: Without dead ends: 26726 [2021-06-05 20:31:53,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:31:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26726 states. [2021-06-05 20:31:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26726 to 24638. [2021-06-05 20:31:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24638 states, 24637 states have (on average 2.4116572634655196) internal successors, (59416), 24637 states have internal predecessors, (59416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24638 states to 24638 states and 59416 transitions. [2021-06-05 20:31:53,860 INFO L78 Accepts]: Start accepts. Automaton has 24638 states and 59416 transitions. Word has length 33 [2021-06-05 20:31:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:53,860 INFO L482 AbstractCegarLoop]: Abstraction has 24638 states and 59416 transitions. [2021-06-05 20:31:53,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 24638 states and 59416 transitions. [2021-06-05 20:31:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:53,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:53,879 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:54,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:54,079 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:54,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1971499207, now seen corresponding path program 82 times [2021-06-05 20:31:54,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:54,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656626173] [2021-06-05 20:31:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:54,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656626173] [2021-06-05 20:31:54,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656626173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925737951] [2021-06-05 20:31:54,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:54,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:31:54,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:54,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:54,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:54,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925737951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:54,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:54,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:54,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934612072] [2021-06-05 20:31:54,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:54,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:54,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:54,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:54,256 INFO L87 Difference]: Start difference. First operand 24638 states and 59416 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:54,635 INFO L93 Difference]: Finished difference Result 29922 states and 71247 transitions. [2021-06-05 20:31:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 20:31:54,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:54,672 INFO L225 Difference]: With dead ends: 29922 [2021-06-05 20:31:54,672 INFO L226 Difference]: Without dead ends: 29902 [2021-06-05 20:31:54,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 20:31:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29902 states. [2021-06-05 20:31:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29902 to 25555. [2021-06-05 20:31:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25555 states, 25554 states have (on average 2.415668779838773) internal successors, (61730), 25554 states have internal predecessors, (61730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25555 states to 25555 states and 61730 transitions. [2021-06-05 20:31:55,089 INFO L78 Accepts]: Start accepts. Automaton has 25555 states and 61730 transitions. Word has length 33 [2021-06-05 20:31:55,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:55,089 INFO L482 AbstractCegarLoop]: Abstraction has 25555 states and 61730 transitions. [2021-06-05 20:31:55,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 25555 states and 61730 transitions. [2021-06-05 20:31:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:55,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:55,108 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:55,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 20:31:55,309 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1304138559, now seen corresponding path program 83 times [2021-06-05 20:31:55,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:55,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835194904] [2021-06-05 20:31:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:55,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835194904] [2021-06-05 20:31:55,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835194904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967872179] [2021-06-05 20:31:55,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:55,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 20:31:55,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:55,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967872179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:55,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:55,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:55,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568882189] [2021-06-05 20:31:55,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:55,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:55,489 INFO L87 Difference]: Start difference. First operand 25555 states and 61730 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:56,173 INFO L93 Difference]: Finished difference Result 28456 states and 68010 transitions. [2021-06-05 20:31:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 20:31:56,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:56,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:56,208 INFO L225 Difference]: With dead ends: 28456 [2021-06-05 20:31:56,208 INFO L226 Difference]: Without dead ends: 28456 [2021-06-05 20:31:56,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 448.3ms TimeCoverageRelationStatistics Valid=814, Invalid=1838, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:31:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28456 states. [2021-06-05 20:31:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28456 to 26023. [2021-06-05 20:31:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26023 states, 26022 states have (on average 2.4139189916224733) internal successors, (62815), 26022 states have internal predecessors, (62815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26023 states to 26023 states and 62815 transitions. [2021-06-05 20:31:56,692 INFO L78 Accepts]: Start accepts. Automaton has 26023 states and 62815 transitions. Word has length 33 [2021-06-05 20:31:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:56,692 INFO L482 AbstractCegarLoop]: Abstraction has 26023 states and 62815 transitions. [2021-06-05 20:31:56,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 26023 states and 62815 transitions. [2021-06-05 20:31:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:56,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:56,712 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:56,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 20:31:56,912 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:56,913 INFO L82 PathProgramCache]: Analyzing trace with hash 139796925, now seen corresponding path program 84 times [2021-06-05 20:31:56,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:56,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169668107] [2021-06-05 20:31:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:56,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:56,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169668107] [2021-06-05 20:31:56,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169668107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:56,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490705204] [2021-06-05 20:31:56,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:57,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 20:31:57,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:31:57,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:57,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490705204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:57,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:57,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:57,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354812523] [2021-06-05 20:31:57,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:57,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:57,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:57,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:57,113 INFO L87 Difference]: Start difference. First operand 26023 states and 62815 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:57,690 INFO L93 Difference]: Finished difference Result 35447 states and 84761 transitions. [2021-06-05 20:31:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 20:31:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:57,737 INFO L225 Difference]: With dead ends: 35447 [2021-06-05 20:31:57,737 INFO L226 Difference]: Without dead ends: 35419 [2021-06-05 20:31:57,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=497, Invalid=1573, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 20:31:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35419 states. [2021-06-05 20:31:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35419 to 29307. [2021-06-05 20:31:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29307 states, 29306 states have (on average 2.4098136900293454) internal successors, (70622), 29306 states have internal predecessors, (70622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29307 states to 29307 states and 70622 transitions. [2021-06-05 20:31:58,271 INFO L78 Accepts]: Start accepts. Automaton has 29307 states and 70622 transitions. Word has length 33 [2021-06-05 20:31:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:31:58,271 INFO L482 AbstractCegarLoop]: Abstraction has 29307 states and 70622 transitions. [2021-06-05 20:31:58,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 29307 states and 70622 transitions. [2021-06-05 20:31:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:31:58,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:31:58,291 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:31:58,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:58,496 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:31:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:31:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash 564054903, now seen corresponding path program 85 times [2021-06-05 20:31:58,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:31:58,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669714362] [2021-06-05 20:31:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:31:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:58,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:31:58,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669714362] [2021-06-05 20:31:58,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669714362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:58,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218693891] [2021-06-05 20:31:58,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:31:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:31:58,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:31:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:31:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:31:58,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218693891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:31:58,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:31:58,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:31:58,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371036697] [2021-06-05 20:31:58,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:31:58,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:31:58,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:31:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:31:58,653 INFO L87 Difference]: Start difference. First operand 29307 states and 70622 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:31:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:31:59,522 INFO L93 Difference]: Finished difference Result 33697 states and 80300 transitions. [2021-06-05 20:31:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 20:31:59,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:31:59,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:31:59,570 INFO L225 Difference]: With dead ends: 33697 [2021-06-05 20:31:59,571 INFO L226 Difference]: Without dead ends: 33697 [2021-06-05 20:31:59,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 530.8ms TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:31:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33697 states. [2021-06-05 20:32:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33697 to 30105. [2021-06-05 20:32:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30105 states, 30104 states have (on average 2.4114403401541322) internal successors, (72594), 30104 states have internal predecessors, (72594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30105 states to 30105 states and 72594 transitions. [2021-06-05 20:32:00,159 INFO L78 Accepts]: Start accepts. Automaton has 30105 states and 72594 transitions. Word has length 33 [2021-06-05 20:32:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:00,159 INFO L482 AbstractCegarLoop]: Abstraction has 30105 states and 72594 transitions. [2021-06-05 20:32:00,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 30105 states and 72594 transitions. [2021-06-05 20:32:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:00,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:00,180 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:00,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:00,381 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:00,381 INFO L82 PathProgramCache]: Analyzing trace with hash -42074695, now seen corresponding path program 86 times [2021-06-05 20:32:00,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:00,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290573087] [2021-06-05 20:32:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:00,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:00,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290573087] [2021-06-05 20:32:00,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290573087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:00,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766512733] [2021-06-05 20:32:00,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:00,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:00,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:00,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766512733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:00,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:00,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:32:00,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021313636] [2021-06-05 20:32:00,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:00,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:00,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:00,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:00,571 INFO L87 Difference]: Start difference. First operand 30105 states and 72594 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:01,148 INFO L93 Difference]: Finished difference Result 37149 states and 89163 transitions. [2021-06-05 20:32:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 20:32:01,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:01,196 INFO L225 Difference]: With dead ends: 37149 [2021-06-05 20:32:01,196 INFO L226 Difference]: Without dead ends: 37125 [2021-06-05 20:32:01,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 388.7ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 20:32:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37125 states. [2021-06-05 20:32:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37125 to 31549. [2021-06-05 20:32:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31549 states, 31548 states have (on average 2.4157157347533915) internal successors, (76211), 31548 states have internal predecessors, (76211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31549 states to 31549 states and 76211 transitions. [2021-06-05 20:32:01,737 INFO L78 Accepts]: Start accepts. Automaton has 31549 states and 76211 transitions. Word has length 33 [2021-06-05 20:32:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:01,737 INFO L482 AbstractCegarLoop]: Abstraction has 31549 states and 76211 transitions. [2021-06-05 20:32:01,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 31549 states and 76211 transitions. [2021-06-05 20:32:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:01,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:01,758 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:01,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:01,959 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:01,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1918288321, now seen corresponding path program 87 times [2021-06-05 20:32:01,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:01,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498804590] [2021-06-05 20:32:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:02,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:02,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498804590] [2021-06-05 20:32:02,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498804590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:02,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697649666] [2021-06-05 20:32:02,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:02,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 20:32:02,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:02,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697649666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:02,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:02,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:32:02,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217698305] [2021-06-05 20:32:02,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:02,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:02,151 INFO L87 Difference]: Start difference. First operand 31549 states and 76211 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:03,029 INFO L93 Difference]: Finished difference Result 35699 states and 85430 transitions. [2021-06-05 20:32:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 20:32:03,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:03,076 INFO L225 Difference]: With dead ends: 35699 [2021-06-05 20:32:03,076 INFO L226 Difference]: Without dead ends: 35699 [2021-06-05 20:32:03,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 571.6ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:32:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35699 states. [2021-06-05 20:32:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35699 to 32809. [2021-06-05 20:32:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32809 states, 32808 states have (on average 2.4214216044867105) internal successors, (79442), 32808 states have internal predecessors, (79442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32809 states to 32809 states and 79442 transitions. [2021-06-05 20:32:03,684 INFO L78 Accepts]: Start accepts. Automaton has 32809 states and 79442 transitions. Word has length 33 [2021-06-05 20:32:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:03,684 INFO L482 AbstractCegarLoop]: Abstraction has 32809 states and 79442 transitions. [2021-06-05 20:32:03,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 32809 states and 79442 transitions. [2021-06-05 20:32:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:03,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:03,704 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:03,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 20:32:03,905 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:03,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:03,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1681326909, now seen corresponding path program 88 times [2021-06-05 20:32:03,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:03,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358665246] [2021-06-05 20:32:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:03,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:03,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358665246] [2021-06-05 20:32:03,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358665246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:03,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63760084] [2021-06-05 20:32:03,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:03,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:03,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:03,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:04,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63760084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:04,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:04,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:32:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259971717] [2021-06-05 20:32:04,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:04,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:04,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:04,084 INFO L87 Difference]: Start difference. First operand 32809 states and 79442 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:04,702 INFO L93 Difference]: Finished difference Result 39072 states and 93960 transitions. [2021-06-05 20:32:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 20:32:04,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:04,754 INFO L225 Difference]: With dead ends: 39072 [2021-06-05 20:32:04,755 INFO L226 Difference]: Without dead ends: 39066 [2021-06-05 20:32:04,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:32:04,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39066 states. [2021-06-05 20:32:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39066 to 33965. [2021-06-05 20:32:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33965 states, 33964 states have (on average 2.4235366859027203) internal successors, (82313), 33964 states have internal predecessors, (82313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33965 states to 33965 states and 82313 transitions. [2021-06-05 20:32:05,317 INFO L78 Accepts]: Start accepts. Automaton has 33965 states and 82313 transitions. Word has length 33 [2021-06-05 20:32:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:05,317 INFO L482 AbstractCegarLoop]: Abstraction has 33965 states and 82313 transitions. [2021-06-05 20:32:05,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 33965 states and 82313 transitions. [2021-06-05 20:32:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:05,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:05,338 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:05,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 20:32:05,539 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:05,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:05,539 INFO L82 PathProgramCache]: Analyzing trace with hash -914762695, now seen corresponding path program 89 times [2021-06-05 20:32:05,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:05,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922109357] [2021-06-05 20:32:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:05,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:05,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922109357] [2021-06-05 20:32:05,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922109357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:05,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871821675] [2021-06-05 20:32:05,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:05,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 20:32:05,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:05,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:05,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:05,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871821675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:05,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:05,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:32:05,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024036694] [2021-06-05 20:32:05,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:05,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:05,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:05,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:05,697 INFO L87 Difference]: Start difference. First operand 33965 states and 82313 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:06,608 INFO L93 Difference]: Finished difference Result 38739 states and 92205 transitions. [2021-06-05 20:32:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 20:32:06,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:06,659 INFO L225 Difference]: With dead ends: 38739 [2021-06-05 20:32:06,660 INFO L226 Difference]: Without dead ends: 38724 [2021-06-05 20:32:06,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:32:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38724 states. [2021-06-05 20:32:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38724 to 31951. [2021-06-05 20:32:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31951 states, 31950 states have (on average 2.4071048513302036) internal successors, (76907), 31950 states have internal predecessors, (76907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31951 states to 31951 states and 76907 transitions. [2021-06-05 20:32:07,312 INFO L78 Accepts]: Start accepts. Automaton has 31951 states and 76907 transitions. Word has length 33 [2021-06-05 20:32:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:07,312 INFO L482 AbstractCegarLoop]: Abstraction has 31951 states and 76907 transitions. [2021-06-05 20:32:07,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 31951 states and 76907 transitions. [2021-06-05 20:32:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:07,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:07,332 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:07,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 20:32:07,533 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash -563035943, now seen corresponding path program 90 times [2021-06-05 20:32:07,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:07,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085385111] [2021-06-05 20:32:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:07,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:07,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085385111] [2021-06-05 20:32:07,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085385111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:07,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350270694] [2021-06-05 20:32:07,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:07,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:32:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:07,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:07,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350270694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:07,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:07,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 20:32:07,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567432922] [2021-06-05 20:32:07,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:07,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:07,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:07,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:07,700 INFO L87 Difference]: Start difference. First operand 31951 states and 76907 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:08,299 INFO L93 Difference]: Finished difference Result 33646 states and 80405 transitions. [2021-06-05 20:32:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 20:32:08,299 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:08,342 INFO L225 Difference]: With dead ends: 33646 [2021-06-05 20:32:08,342 INFO L226 Difference]: Without dead ends: 33640 [2021-06-05 20:32:08,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 375.2ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:32:08,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33640 states. [2021-06-05 20:32:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33640 to 28584. [2021-06-05 20:32:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28584 states, 28583 states have (on average 2.402581954308505) internal successors, (68673), 28583 states have internal predecessors, (68673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28584 states to 28584 states and 68673 transitions. [2021-06-05 20:32:08,798 INFO L78 Accepts]: Start accepts. Automaton has 28584 states and 68673 transitions. Word has length 33 [2021-06-05 20:32:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:08,798 INFO L482 AbstractCegarLoop]: Abstraction has 28584 states and 68673 transitions. [2021-06-05 20:32:08,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 28584 states and 68673 transitions. [2021-06-05 20:32:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:08,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:08,817 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:09,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 20:32:09,018 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:09,018 INFO L82 PathProgramCache]: Analyzing trace with hash -605588071, now seen corresponding path program 91 times [2021-06-05 20:32:09,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:09,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571896558] [2021-06-05 20:32:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:09,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:09,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571896558] [2021-06-05 20:32:09,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571896558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:09,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745102835] [2021-06-05 20:32:09,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:09,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:09,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745102835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:09,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:09,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 20:32:09,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968407865] [2021-06-05 20:32:09,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 20:32:09,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:09,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 20:32:09,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 20:32:09,194 INFO L87 Difference]: Start difference. First operand 28584 states and 68673 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:09,820 INFO L93 Difference]: Finished difference Result 31047 states and 73946 transitions. [2021-06-05 20:32:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 20:32:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:09,860 INFO L225 Difference]: With dead ends: 31047 [2021-06-05 20:32:09,860 INFO L226 Difference]: Without dead ends: 31025 [2021-06-05 20:32:09,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=631, Invalid=1439, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 20:32:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31025 states. [2021-06-05 20:32:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31025 to 28517. [2021-06-05 20:32:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28517 states, 28516 states have (on average 2.402966755505681) internal successors, (68523), 28516 states have internal predecessors, (68523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28517 states to 28517 states and 68523 transitions. [2021-06-05 20:32:10,424 INFO L78 Accepts]: Start accepts. Automaton has 28517 states and 68523 transitions. Word has length 33 [2021-06-05 20:32:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:10,424 INFO L482 AbstractCegarLoop]: Abstraction has 28517 states and 68523 transitions. [2021-06-05 20:32:10,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 28517 states and 68523 transitions. [2021-06-05 20:32:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:10,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:10,443 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:10,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 20:32:10,644 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:10,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2106346791, now seen corresponding path program 92 times [2021-06-05 20:32:10,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:10,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521843962] [2021-06-05 20:32:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:10,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:10,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521843962] [2021-06-05 20:32:10,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521843962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:10,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688706483] [2021-06-05 20:32:10,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:10,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:10,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:10,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688706483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:10,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:10,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 20:32:10,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656891949] [2021-06-05 20:32:10,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:10,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:10,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:10,841 INFO L87 Difference]: Start difference. First operand 28517 states and 68523 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:11,577 INFO L93 Difference]: Finished difference Result 31772 states and 75615 transitions. [2021-06-05 20:32:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 20:32:11,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:11,619 INFO L225 Difference]: With dead ends: 31772 [2021-06-05 20:32:11,619 INFO L226 Difference]: Without dead ends: 31762 [2021-06-05 20:32:11,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:32:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31762 states. [2021-06-05 20:32:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31762 to 28744. [2021-06-05 20:32:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28744 states, 28743 states have (on average 2.4025675816720593) internal successors, (69057), 28743 states have internal predecessors, (69057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28744 states to 28744 states and 69057 transitions. [2021-06-05 20:32:12,125 INFO L78 Accepts]: Start accepts. Automaton has 28744 states and 69057 transitions. Word has length 33 [2021-06-05 20:32:12,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:12,125 INFO L482 AbstractCegarLoop]: Abstraction has 28744 states and 69057 transitions. [2021-06-05 20:32:12,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 28744 states and 69057 transitions. [2021-06-05 20:32:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:12,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:12,145 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:12,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 20:32:12,346 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:12,351 INFO L82 PathProgramCache]: Analyzing trace with hash 592608665, now seen corresponding path program 93 times [2021-06-05 20:32:12,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:12,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649889967] [2021-06-05 20:32:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:12,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:12,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649889967] [2021-06-05 20:32:12,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649889967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:12,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744044328] [2021-06-05 20:32:12,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:12,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 20:32:12,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:12,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:12,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:12,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744044328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:12,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:12,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 20:32:12,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112799872] [2021-06-05 20:32:12,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:12,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:12,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:12,576 INFO L87 Difference]: Start difference. First operand 28744 states and 69057 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:13,368 INFO L93 Difference]: Finished difference Result 34173 states and 81150 transitions. [2021-06-05 20:32:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 20:32:13,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:13,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:13,413 INFO L225 Difference]: With dead ends: 34173 [2021-06-05 20:32:13,413 INFO L226 Difference]: Without dead ends: 34169 [2021-06-05 20:32:13,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=983, Invalid=2097, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 20:32:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34169 states. [2021-06-05 20:32:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34169 to 29028. [2021-06-05 20:32:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29028 states, 29027 states have (on average 2.401384917490612) internal successors, (69705), 29027 states have internal predecessors, (69705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29028 states to 29028 states and 69705 transitions. [2021-06-05 20:32:13,880 INFO L78 Accepts]: Start accepts. Automaton has 29028 states and 69705 transitions. Word has length 33 [2021-06-05 20:32:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:13,880 INFO L482 AbstractCegarLoop]: Abstraction has 29028 states and 69705 transitions. [2021-06-05 20:32:13,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:13,880 INFO L276 IsEmpty]: Start isEmpty. Operand 29028 states and 69705 transitions. [2021-06-05 20:32:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:13,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:13,899 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:14,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 20:32:14,099 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1037718823, now seen corresponding path program 94 times [2021-06-05 20:32:14,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:14,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910757369] [2021-06-05 20:32:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:14,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910757369] [2021-06-05 20:32:14,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910757369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999816309] [2021-06-05 20:32:14,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:14,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:14,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:14,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999816309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:14,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:14,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 20:32:14,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293295763] [2021-06-05 20:32:14,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:14,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:14,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:14,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:14,259 INFO L87 Difference]: Start difference. First operand 29028 states and 69705 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:15,090 INFO L93 Difference]: Finished difference Result 34423 states and 81836 transitions. [2021-06-05 20:32:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 20:32:15,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:15,133 INFO L225 Difference]: With dead ends: 34423 [2021-06-05 20:32:15,133 INFO L226 Difference]: Without dead ends: 34423 [2021-06-05 20:32:15,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 546.0ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:32:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34423 states. [2021-06-05 20:32:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34423 to 30566. [2021-06-05 20:32:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30566 states, 30565 states have (on average 2.405332897104531) internal successors, (73519), 30565 states have internal predecessors, (73519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30566 states to 30566 states and 73519 transitions. [2021-06-05 20:32:15,698 INFO L78 Accepts]: Start accepts. Automaton has 30566 states and 73519 transitions. Word has length 33 [2021-06-05 20:32:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:15,698 INFO L482 AbstractCegarLoop]: Abstraction has 30566 states and 73519 transitions. [2021-06-05 20:32:15,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 30566 states and 73519 transitions. [2021-06-05 20:32:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:15,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:15,717 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:15,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:15,918 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:15,918 INFO L82 PathProgramCache]: Analyzing trace with hash 317533555, now seen corresponding path program 95 times [2021-06-05 20:32:15,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:15,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947415896] [2021-06-05 20:32:15,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:15,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:15,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947415896] [2021-06-05 20:32:15,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947415896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:15,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7417760] [2021-06-05 20:32:15,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:15,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 20:32:15,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:16,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7417760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:16,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:16,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 20:32:16,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921860361] [2021-06-05 20:32:16,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:16,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:16,074 INFO L87 Difference]: Start difference. First operand 30566 states and 73519 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:16,739 INFO L93 Difference]: Finished difference Result 33401 states and 79605 transitions. [2021-06-05 20:32:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 20:32:16,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:16,781 INFO L225 Difference]: With dead ends: 33401 [2021-06-05 20:32:16,782 INFO L226 Difference]: Without dead ends: 33392 [2021-06-05 20:32:16,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=847, Invalid=1703, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:32:16,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33392 states. [2021-06-05 20:32:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33392 to 26944. [2021-06-05 20:32:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26944 states, 26943 states have (on average 2.395427383736035) internal successors, (64540), 26943 states have internal predecessors, (64540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26944 states to 26944 states and 64540 transitions. [2021-06-05 20:32:17,234 INFO L78 Accepts]: Start accepts. Automaton has 26944 states and 64540 transitions. Word has length 33 [2021-06-05 20:32:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:17,234 INFO L482 AbstractCegarLoop]: Abstraction has 26944 states and 64540 transitions. [2021-06-05 20:32:17,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26944 states and 64540 transitions. [2021-06-05 20:32:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:17,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:17,253 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:17,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 20:32:17,454 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash -188812711, now seen corresponding path program 96 times [2021-06-05 20:32:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:17,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591644699] [2021-06-05 20:32:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:17,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591644699] [2021-06-05 20:32:17,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591644699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402494090] [2021-06-05 20:32:17,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:17,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 20:32:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:17,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402494090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:17,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:17,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 20:32:17,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411937421] [2021-06-05 20:32:17,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 20:32:17,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:17,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 20:32:17,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 20:32:17,652 INFO L87 Difference]: Start difference. First operand 26944 states and 64540 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:18,232 INFO L93 Difference]: Finished difference Result 30318 states and 71996 transitions. [2021-06-05 20:32:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 20:32:18,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:18,271 INFO L225 Difference]: With dead ends: 30318 [2021-06-05 20:32:18,271 INFO L226 Difference]: Without dead ends: 30294 [2021-06-05 20:32:18,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 394.0ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:32:18,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30294 states. [2021-06-05 20:32:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30294 to 26469. [2021-06-05 20:32:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26469 states, 26468 states have (on average 2.400861417560828) internal successors, (63546), 26468 states have internal predecessors, (63546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26469 states to 26469 states and 63546 transitions. [2021-06-05 20:32:18,704 INFO L78 Accepts]: Start accepts. Automaton has 26469 states and 63546 transitions. Word has length 33 [2021-06-05 20:32:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:18,704 INFO L482 AbstractCegarLoop]: Abstraction has 26469 states and 63546 transitions. [2021-06-05 20:32:18,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 26469 states and 63546 transitions. [2021-06-05 20:32:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:18,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:18,722 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:18,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:18,922 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash -841411653, now seen corresponding path program 97 times [2021-06-05 20:32:18,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:18,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019100994] [2021-06-05 20:32:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:18,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:18,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019100994] [2021-06-05 20:32:18,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019100994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:18,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634316683] [2021-06-05 20:32:18,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:18,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:18,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:19,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634316683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:19,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:19,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 20:32:19,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821657960] [2021-06-05 20:32:19,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:32:19,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:19,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:32:19,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:32:19,099 INFO L87 Difference]: Start difference. First operand 26469 states and 63546 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:19,712 INFO L93 Difference]: Finished difference Result 28516 states and 67822 transitions. [2021-06-05 20:32:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 20:32:19,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:19,747 INFO L225 Difference]: With dead ends: 28516 [2021-06-05 20:32:19,747 INFO L226 Difference]: Without dead ends: 28494 [2021-06-05 20:32:19,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 426.3ms TimeCoverageRelationStatistics Valid=676, Invalid=1676, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:32:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28494 states. [2021-06-05 20:32:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28494 to 26253. [2021-06-05 20:32:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26253 states, 26252 states have (on average 2.400693280511961) internal successors, (63023), 26252 states have internal predecessors, (63023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26253 states to 26253 states and 63023 transitions. [2021-06-05 20:32:20,202 INFO L78 Accepts]: Start accepts. Automaton has 26253 states and 63023 transitions. Word has length 33 [2021-06-05 20:32:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:20,202 INFO L482 AbstractCegarLoop]: Abstraction has 26253 states and 63023 transitions. [2021-06-05 20:32:20,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 26253 states and 63023 transitions. [2021-06-05 20:32:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:20,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:20,220 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:20,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 20:32:20,422 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:20,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:20,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1083717823, now seen corresponding path program 98 times [2021-06-05 20:32:20,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:20,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380734953] [2021-06-05 20:32:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:20,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:20,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380734953] [2021-06-05 20:32:20,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380734953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:20,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542076625] [2021-06-05 20:32:20,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:20,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:20,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:20,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542076625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:20,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:20,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 20:32:20,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735636010] [2021-06-05 20:32:20,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 20:32:20,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:20,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 20:32:20,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 20:32:20,605 INFO L87 Difference]: Start difference. First operand 26253 states and 63023 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:21,306 INFO L93 Difference]: Finished difference Result 30910 states and 73350 transitions. [2021-06-05 20:32:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 20:32:21,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:21,344 INFO L225 Difference]: With dead ends: 30910 [2021-06-05 20:32:21,344 INFO L226 Difference]: Without dead ends: 30900 [2021-06-05 20:32:21,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=732, Invalid=1718, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:32:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30900 states. [2021-06-05 20:32:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30900 to 26551. [2021-06-05 20:32:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26551 states, 26550 states have (on average 2.3992090395480226) internal successors, (63699), 26550 states have internal predecessors, (63699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26551 states to 26551 states and 63699 transitions. [2021-06-05 20:32:21,756 INFO L78 Accepts]: Start accepts. Automaton has 26551 states and 63699 transitions. Word has length 33 [2021-06-05 20:32:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:21,757 INFO L482 AbstractCegarLoop]: Abstraction has 26551 states and 63699 transitions. [2021-06-05 20:32:21,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 26551 states and 63699 transitions. [2021-06-05 20:32:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:21,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:21,779 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:21,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:21,993 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash -975252933, now seen corresponding path program 99 times [2021-06-05 20:32:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:21,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431210046] [2021-06-05 20:32:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:22,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431210046] [2021-06-05 20:32:22,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431210046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314954904] [2021-06-05 20:32:22,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:22,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:32:22,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:22,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:22,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:22,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314954904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:22,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:22,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 20:32:22,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044515776] [2021-06-05 20:32:22,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:22,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:22,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:22,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:22,172 INFO L87 Difference]: Start difference. First operand 26551 states and 63699 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:22,962 INFO L93 Difference]: Finished difference Result 34573 states and 82100 transitions. [2021-06-05 20:32:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 20:32:22,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:23,007 INFO L225 Difference]: With dead ends: 34573 [2021-06-05 20:32:23,008 INFO L226 Difference]: Without dead ends: 34571 [2021-06-05 20:32:23,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=975, Invalid=1995, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:32:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34571 states. [2021-06-05 20:32:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34571 to 27411. [2021-06-05 20:32:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27411 states, 27410 states have (on average 2.39799343305363) internal successors, (65729), 27410 states have internal predecessors, (65729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27411 states to 27411 states and 65729 transitions. [2021-06-05 20:32:23,458 INFO L78 Accepts]: Start accepts. Automaton has 27411 states and 65729 transitions. Word has length 33 [2021-06-05 20:32:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:23,458 INFO L482 AbstractCegarLoop]: Abstraction has 27411 states and 65729 transitions. [2021-06-05 20:32:23,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 27411 states and 65729 transitions. [2021-06-05 20:32:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:23,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:23,475 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:23,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 20:32:23,676 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1812924991, now seen corresponding path program 100 times [2021-06-05 20:32:23,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:23,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56614593] [2021-06-05 20:32:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:23,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:23,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56614593] [2021-06-05 20:32:23,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56614593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:23,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986993553] [2021-06-05 20:32:23,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:23,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:23,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:23,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986993553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:23,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:23,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 20:32:23,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013450726] [2021-06-05 20:32:23,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:23,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:23,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:23,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:23,870 INFO L87 Difference]: Start difference. First operand 27411 states and 65729 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:24,736 INFO L93 Difference]: Finished difference Result 35488 states and 84024 transitions. [2021-06-05 20:32:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 20:32:24,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:24,782 INFO L225 Difference]: With dead ends: 35488 [2021-06-05 20:32:24,782 INFO L226 Difference]: Without dead ends: 35488 [2021-06-05 20:32:24,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 20:32:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35488 states. [2021-06-05 20:32:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35488 to 29994. [2021-06-05 20:32:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29994 states, 29993 states have (on average 2.400693495148868) internal successors, (72004), 29993 states have internal predecessors, (72004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29994 states to 29994 states and 72004 transitions. [2021-06-05 20:32:25,341 INFO L78 Accepts]: Start accepts. Automaton has 29994 states and 72004 transitions. Word has length 33 [2021-06-05 20:32:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:25,341 INFO L482 AbstractCegarLoop]: Abstraction has 29994 states and 72004 transitions. [2021-06-05 20:32:25,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 29994 states and 72004 transitions. [2021-06-05 20:32:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:25,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:25,360 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:25,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 20:32:25,561 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:25,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1126789927, now seen corresponding path program 101 times [2021-06-05 20:32:25,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:25,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966137076] [2021-06-05 20:32:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:25,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:25,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966137076] [2021-06-05 20:32:25,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966137076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312862689] [2021-06-05 20:32:25,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:25,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 20:32:25,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:25,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:25,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:25,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312862689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:25,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:25,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 20:32:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419052314] [2021-06-05 20:32:25,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:25,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:25,720 INFO L87 Difference]: Start difference. First operand 29994 states and 72004 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:26,448 INFO L93 Difference]: Finished difference Result 34655 states and 82191 transitions. [2021-06-05 20:32:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 20:32:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:26,492 INFO L225 Difference]: With dead ends: 34655 [2021-06-05 20:32:26,492 INFO L226 Difference]: Without dead ends: 34646 [2021-06-05 20:32:26,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 487.7ms TimeCoverageRelationStatistics Valid=1030, Invalid=2162, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:32:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34646 states. [2021-06-05 20:32:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34646 to 28301. [2021-06-05 20:32:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28301 states, 28300 states have (on average 2.3935689045936397) internal successors, (67738), 28300 states have internal predecessors, (67738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28301 states to 28301 states and 67738 transitions. [2021-06-05 20:32:26,953 INFO L78 Accepts]: Start accepts. Automaton has 28301 states and 67738 transitions. Word has length 33 [2021-06-05 20:32:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:26,953 INFO L482 AbstractCegarLoop]: Abstraction has 28301 states and 67738 transitions. [2021-06-05 20:32:26,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 28301 states and 67738 transitions. [2021-06-05 20:32:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:26,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:26,972 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:27,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 20:32:27,173 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1633136193, now seen corresponding path program 102 times [2021-06-05 20:32:27,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:27,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56808182] [2021-06-05 20:32:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:27,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:27,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56808182] [2021-06-05 20:32:27,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56808182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:27,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024135530] [2021-06-05 20:32:27,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:27,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 20:32:27,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:27,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:27,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:27,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024135530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:27,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:27,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 20:32:27,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834926239] [2021-06-05 20:32:27,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 20:32:27,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 20:32:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 20:32:27,335 INFO L87 Difference]: Start difference. First operand 28301 states and 67738 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:27,970 INFO L93 Difference]: Finished difference Result 33895 states and 80186 transitions. [2021-06-05 20:32:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 20:32:27,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:28,026 INFO L225 Difference]: With dead ends: 33895 [2021-06-05 20:32:28,026 INFO L226 Difference]: Without dead ends: 33859 [2021-06-05 20:32:28,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=877, Invalid=1985, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:32:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33859 states. [2021-06-05 20:32:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33859 to 27687. [2021-06-05 20:32:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27687 states, 27686 states have (on average 2.394567651520624) internal successors, (66296), 27686 states have internal predecessors, (66296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27687 states to 27687 states and 66296 transitions. [2021-06-05 20:32:28,480 INFO L78 Accepts]: Start accepts. Automaton has 27687 states and 66296 transitions. Word has length 33 [2021-06-05 20:32:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:28,480 INFO L482 AbstractCegarLoop]: Abstraction has 27687 states and 66296 transitions. [2021-06-05 20:32:28,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 27687 states and 66296 transitions. [2021-06-05 20:32:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:28,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:28,498 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:28,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:28,705 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash 108199965, now seen corresponding path program 103 times [2021-06-05 20:32:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:28,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089498385] [2021-06-05 20:32:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:28,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:28,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089498385] [2021-06-05 20:32:28,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089498385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:28,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151748728] [2021-06-05 20:32:28,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:28,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:28,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:28,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151748728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:28,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:28,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 20:32:28,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463478566] [2021-06-05 20:32:28,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:32:28,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:28,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:32:28,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:32:28,877 INFO L87 Difference]: Start difference. First operand 27687 states and 66296 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:29,431 INFO L93 Difference]: Finished difference Result 33459 states and 79150 transitions. [2021-06-05 20:32:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 20:32:29,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:29,474 INFO L225 Difference]: With dead ends: 33459 [2021-06-05 20:32:29,474 INFO L226 Difference]: Without dead ends: 33417 [2021-06-05 20:32:29,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:32:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33417 states. [2021-06-05 20:32:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33417 to 27981. [2021-06-05 20:32:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27981 states, 27980 states have (on average 2.398141529664046) internal successors, (67100), 27980 states have internal predecessors, (67100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27981 states to 27981 states and 67100 transitions. [2021-06-05 20:32:30,017 INFO L78 Accepts]: Start accepts. Automaton has 27981 states and 67100 transitions. Word has length 33 [2021-06-05 20:32:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:30,017 INFO L482 AbstractCegarLoop]: Abstraction has 27981 states and 67100 transitions. [2021-06-05 20:32:30,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27981 states and 67100 transitions. [2021-06-05 20:32:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:30,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:30,036 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:30,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 20:32:30,237 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash 304753241, now seen corresponding path program 104 times [2021-06-05 20:32:30,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:30,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768630479] [2021-06-05 20:32:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:30,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:30,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768630479] [2021-06-05 20:32:30,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768630479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:30,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649332652] [2021-06-05 20:32:30,283 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:30,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:30,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:30,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649332652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:30,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:30,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:32:30,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105743772] [2021-06-05 20:32:30,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:32:30,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:30,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:32:30,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:32:30,437 INFO L87 Difference]: Start difference. First operand 27981 states and 67100 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:31,101 INFO L93 Difference]: Finished difference Result 31375 states and 74465 transitions. [2021-06-05 20:32:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 20:32:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:31,142 INFO L225 Difference]: With dead ends: 31375 [2021-06-05 20:32:31,143 INFO L226 Difference]: Without dead ends: 31353 [2021-06-05 20:32:31,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:32:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31353 states. [2021-06-05 20:32:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31353 to 28442. [2021-06-05 20:32:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28442 states, 28441 states have (on average 2.3948876621778417) internal successors, (68113), 28441 states have internal predecessors, (68113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28442 states to 28442 states and 68113 transitions. [2021-06-05 20:32:31,557 INFO L78 Accepts]: Start accepts. Automaton has 28442 states and 68113 transitions. Word has length 33 [2021-06-05 20:32:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:31,557 INFO L482 AbstractCegarLoop]: Abstraction has 28442 states and 68113 transitions. [2021-06-05 20:32:31,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 28442 states and 68113 transitions. [2021-06-05 20:32:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:31,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:31,575 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:31,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:31,775 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:31,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1557274905, now seen corresponding path program 105 times [2021-06-05 20:32:31,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:31,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247271205] [2021-06-05 20:32:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:31,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:31,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247271205] [2021-06-05 20:32:31,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247271205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:31,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613039856] [2021-06-05 20:32:31,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:31,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 20:32:31,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:31,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:31,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:31,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613039856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:31,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:31,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 20:32:31,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528934812] [2021-06-05 20:32:31,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:32:31,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:31,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:32:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:32:31,993 INFO L87 Difference]: Start difference. First operand 28442 states and 68113 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:32,747 INFO L93 Difference]: Finished difference Result 35592 states and 84293 transitions. [2021-06-05 20:32:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 20:32:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:32,790 INFO L225 Difference]: With dead ends: 35592 [2021-06-05 20:32:32,791 INFO L226 Difference]: Without dead ends: 35582 [2021-06-05 20:32:32,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=809, Invalid=2053, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:32:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35582 states. [2021-06-05 20:32:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35582 to 29983. [2021-06-05 20:32:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29983 states, 29982 states have (on average 2.395337202321393) internal successors, (71817), 29982 states have internal predecessors, (71817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29983 states to 29983 states and 71817 transitions. [2021-06-05 20:32:33,246 INFO L78 Accepts]: Start accepts. Automaton has 29983 states and 71817 transitions. Word has length 33 [2021-06-05 20:32:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:33,246 INFO L482 AbstractCegarLoop]: Abstraction has 29983 states and 71817 transitions. [2021-06-05 20:32:33,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 29983 states and 71817 transitions. [2021-06-05 20:32:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:33,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:33,265 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:33,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 20:32:33,466 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:33,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1370774951, now seen corresponding path program 106 times [2021-06-05 20:32:33,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:33,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828837262] [2021-06-05 20:32:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:33,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:33,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828837262] [2021-06-05 20:32:33,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828837262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:33,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338264948] [2021-06-05 20:32:33,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:33,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:33,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:33,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:33,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338264948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:33,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:33,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 20:32:33,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538891782] [2021-06-05 20:32:33,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 20:32:33,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 20:32:33,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 20:32:33,642 INFO L87 Difference]: Start difference. First operand 29983 states and 71817 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:34,538 INFO L93 Difference]: Finished difference Result 39533 states and 93839 transitions. [2021-06-05 20:32:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 20:32:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:34,586 INFO L225 Difference]: With dead ends: 39533 [2021-06-05 20:32:34,586 INFO L226 Difference]: Without dead ends: 39531 [2021-06-05 20:32:34,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 620.0ms TimeCoverageRelationStatistics Valid=1227, Invalid=2679, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:32:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39531 states. [2021-06-05 20:32:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39531 to 32701. [2021-06-05 20:32:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32701 states, 32700 states have (on average 2.3938837920489298) internal successors, (78280), 32700 states have internal predecessors, (78280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32701 states to 32701 states and 78280 transitions. [2021-06-05 20:32:35,160 INFO L78 Accepts]: Start accepts. Automaton has 32701 states and 78280 transitions. Word has length 33 [2021-06-05 20:32:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:35,160 INFO L482 AbstractCegarLoop]: Abstraction has 32701 states and 78280 transitions. [2021-06-05 20:32:35,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 32701 states and 78280 transitions. [2021-06-05 20:32:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:35,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:35,180 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:35,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 20:32:35,382 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:35,382 INFO L82 PathProgramCache]: Analyzing trace with hash 954444057, now seen corresponding path program 107 times [2021-06-05 20:32:35,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:35,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354716314] [2021-06-05 20:32:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:35,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:35,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354716314] [2021-06-05 20:32:35,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354716314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:35,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792874198] [2021-06-05 20:32:35,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:35,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 20:32:35,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:35,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792874198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:35,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:35,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 20:32:35,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078083975] [2021-06-05 20:32:35,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:35,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:35,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:35,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:35,552 INFO L87 Difference]: Start difference. First operand 32701 states and 78280 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:36,433 INFO L93 Difference]: Finished difference Result 46041 states and 109158 transitions. [2021-06-05 20:32:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 20:32:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:36,493 INFO L225 Difference]: With dead ends: 46041 [2021-06-05 20:32:36,493 INFO L226 Difference]: Without dead ends: 46041 [2021-06-05 20:32:36,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 607.1ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 20:32:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46041 states. [2021-06-05 20:32:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46041 to 40567. [2021-06-05 20:32:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40567 states, 40566 states have (on average 2.3920524577232163) internal successors, (97036), 40566 states have internal predecessors, (97036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40567 states to 40567 states and 97036 transitions. [2021-06-05 20:32:37,148 INFO L78 Accepts]: Start accepts. Automaton has 40567 states and 97036 transitions. Word has length 33 [2021-06-05 20:32:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:37,148 INFO L482 AbstractCegarLoop]: Abstraction has 40567 states and 97036 transitions. [2021-06-05 20:32:37,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:37,148 INFO L276 IsEmpty]: Start isEmpty. Operand 40567 states and 97036 transitions. [2021-06-05 20:32:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:37,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:37,169 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:37,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 20:32:37,370 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:37,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1985270861, now seen corresponding path program 108 times [2021-06-05 20:32:37,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:37,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115628592] [2021-06-05 20:32:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:37,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:37,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115628592] [2021-06-05 20:32:37,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115628592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:37,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399210950] [2021-06-05 20:32:37,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:37,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:32:37,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:37,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:37,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399210950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:37,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:37,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 20:32:37,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295284778] [2021-06-05 20:32:37,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 20:32:37,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:37,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 20:32:37,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 20:32:37,528 INFO L87 Difference]: Start difference. First operand 40567 states and 97036 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:38,315 INFO L93 Difference]: Finished difference Result 45487 states and 107865 transitions. [2021-06-05 20:32:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 20:32:38,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:38,372 INFO L225 Difference]: With dead ends: 45487 [2021-06-05 20:32:38,372 INFO L226 Difference]: Without dead ends: 45481 [2021-06-05 20:32:38,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=1091, Invalid=2449, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:32:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45481 states. [2021-06-05 20:32:39,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45481 to 39993. [2021-06-05 20:32:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39993 states, 39992 states have (on average 2.389602920584117) internal successors, (95565), 39992 states have internal predecessors, (95565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39993 states to 39993 states and 95565 transitions. [2021-06-05 20:32:39,119 INFO L78 Accepts]: Start accepts. Automaton has 39993 states and 95565 transitions. Word has length 33 [2021-06-05 20:32:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:39,119 INFO L482 AbstractCegarLoop]: Abstraction has 39993 states and 95565 transitions. [2021-06-05 20:32:39,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 39993 states and 95565 transitions. [2021-06-05 20:32:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:39,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:39,142 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:39,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:39,342 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1803350169, now seen corresponding path program 109 times [2021-06-05 20:32:39,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:39,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406495930] [2021-06-05 20:32:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:39,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:39,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406495930] [2021-06-05 20:32:39,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406495930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:39,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841602754] [2021-06-05 20:32:39,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:39,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:39,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:39,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841602754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:39,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:39,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 20:32:39,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782191949] [2021-06-05 20:32:39,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 20:32:39,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:39,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 20:32:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 20:32:39,502 INFO L87 Difference]: Start difference. First operand 39993 states and 95565 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:40,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:40,243 INFO L93 Difference]: Finished difference Result 45917 states and 108842 transitions. [2021-06-05 20:32:40,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 20:32:40,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:40,302 INFO L225 Difference]: With dead ends: 45917 [2021-06-05 20:32:40,303 INFO L226 Difference]: Without dead ends: 45893 [2021-06-05 20:32:40,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:32:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45893 states. [2021-06-05 20:32:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45893 to 41022. [2021-06-05 20:32:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41022 states, 41021 states have (on average 2.388825235854806) internal successors, (97992), 41021 states have internal predecessors, (97992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41022 states to 41022 states and 97992 transitions. [2021-06-05 20:32:40,930 INFO L78 Accepts]: Start accepts. Automaton has 41022 states and 97992 transitions. Word has length 33 [2021-06-05 20:32:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:40,930 INFO L482 AbstractCegarLoop]: Abstraction has 41022 states and 97992 transitions. [2021-06-05 20:32:40,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 41022 states and 97992 transitions. [2021-06-05 20:32:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:40,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:40,951 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:41,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:41,152 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash -750280969, now seen corresponding path program 110 times [2021-06-05 20:32:41,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:41,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262878823] [2021-06-05 20:32:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:41,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:41,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262878823] [2021-06-05 20:32:41,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262878823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:41,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546702794] [2021-06-05 20:32:41,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:41,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:41,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:41,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:41,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546702794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:41,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:41,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 20:32:41,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840010235] [2021-06-05 20:32:41,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:32:41,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:41,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:32:41,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:32:41,357 INFO L87 Difference]: Start difference. First operand 41022 states and 97992 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:42,009 INFO L93 Difference]: Finished difference Result 48036 states and 113852 transitions. [2021-06-05 20:32:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 20:32:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:42,068 INFO L225 Difference]: With dead ends: 48036 [2021-06-05 20:32:42,069 INFO L226 Difference]: Without dead ends: 47994 [2021-06-05 20:32:42,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=806, Invalid=2056, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:32:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47994 states. [2021-06-05 20:32:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47994 to 43024. [2021-06-05 20:32:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43024 states, 43023 states have (on average 2.388420147363038) internal successors, (102757), 43023 states have internal predecessors, (102757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43024 states to 43024 states and 102757 transitions. [2021-06-05 20:32:42,736 INFO L78 Accepts]: Start accepts. Automaton has 43024 states and 102757 transitions. Word has length 33 [2021-06-05 20:32:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:42,736 INFO L482 AbstractCegarLoop]: Abstraction has 43024 states and 102757 transitions. [2021-06-05 20:32:42,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 43024 states and 102757 transitions. [2021-06-05 20:32:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 20:32:42,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:42,956 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:43,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:43,156 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash 780200921, now seen corresponding path program 111 times [2021-06-05 20:32:43,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:43,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939132977] [2021-06-05 20:32:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:43,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:43,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939132977] [2021-06-05 20:32:43,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939132977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:43,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866750375] [2021-06-05 20:32:43,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:43,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:32:43,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:32:43,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:43,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866750375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:43,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:43,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 20:32:43,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826321745] [2021-06-05 20:32:43,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:32:43,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:32:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:32:43,359 INFO L87 Difference]: Start difference. First operand 43024 states and 102757 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:43,959 INFO L93 Difference]: Finished difference Result 49178 states and 116640 transitions. [2021-06-05 20:32:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 20:32:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 20:32:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:44,021 INFO L225 Difference]: With dead ends: 49178 [2021-06-05 20:32:44,022 INFO L226 Difference]: Without dead ends: 49118 [2021-06-05 20:32:44,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 20:32:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49118 states. [2021-06-05 20:32:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49118 to 44346. [2021-06-05 20:32:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44346 states, 44345 states have (on average 2.387529597474349) internal successors, (105875), 44345 states have internal predecessors, (105875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44346 states to 44346 states and 105875 transitions. [2021-06-05 20:32:44,702 INFO L78 Accepts]: Start accepts. Automaton has 44346 states and 105875 transitions. Word has length 33 [2021-06-05 20:32:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:44,702 INFO L482 AbstractCegarLoop]: Abstraction has 44346 states and 105875 transitions. [2021-06-05 20:32:44,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 44346 states and 105875 transitions. [2021-06-05 20:32:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 20:32:44,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:44,735 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:44,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 20:32:44,936 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash -629463398, now seen corresponding path program 112 times [2021-06-05 20:32:44,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:44,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333381997] [2021-06-05 20:32:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:45,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:45,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333381997] [2021-06-05 20:32:45,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333381997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:45,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375513819] [2021-06-05 20:32:45,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:45,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:45,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:32:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:45,248 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 20:32:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:45,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375513819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:45,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:45,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 20:32:45,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945624919] [2021-06-05 20:32:45,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 20:32:45,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 20:32:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:45,273 INFO L87 Difference]: Start difference. First operand 44346 states and 105875 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:45,428 INFO L93 Difference]: Finished difference Result 48008 states and 114788 transitions. [2021-06-05 20:32:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:32:45,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 20:32:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:45,491 INFO L225 Difference]: With dead ends: 48008 [2021-06-05 20:32:45,492 INFO L226 Difference]: Without dead ends: 47969 [2021-06-05 20:32:45,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47969 states. [2021-06-05 20:32:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47969 to 45223. [2021-06-05 20:32:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45223 states, 45222 states have (on average 2.3889036309760736) internal successors, (108031), 45222 states have internal predecessors, (108031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45223 states to 45223 states and 108031 transitions. [2021-06-05 20:32:46,249 INFO L78 Accepts]: Start accepts. Automaton has 45223 states and 108031 transitions. Word has length 36 [2021-06-05 20:32:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:46,249 INFO L482 AbstractCegarLoop]: Abstraction has 45223 states and 108031 transitions. [2021-06-05 20:32:46,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 45223 states and 108031 transitions. [2021-06-05 20:32:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 20:32:46,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:46,284 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:46,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 20:32:46,485 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:46,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1597045130, now seen corresponding path program 113 times [2021-06-05 20:32:46,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:46,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167496975] [2021-06-05 20:32:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:46,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:46,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167496975] [2021-06-05 20:32:46,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167496975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:46,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718083830] [2021-06-05 20:32:46,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:46,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 20:32:46,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:46,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:32:46,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:46,803 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 20:32:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:46,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718083830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:46,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:46,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 20:32:46,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585236091] [2021-06-05 20:32:46,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 20:32:46,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:46,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 20:32:46,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:46,815 INFO L87 Difference]: Start difference. First operand 45223 states and 108031 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:46,979 INFO L93 Difference]: Finished difference Result 52337 states and 125670 transitions. [2021-06-05 20:32:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:32:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 20:32:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:47,053 INFO L225 Difference]: With dead ends: 52337 [2021-06-05 20:32:47,053 INFO L226 Difference]: Without dead ends: 52292 [2021-06-05 20:32:47,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52292 states. [2021-06-05 20:32:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52292 to 46254. [2021-06-05 20:32:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46254 states, 46253 states have (on average 2.3954986703565173) internal successors, (110799), 46253 states have internal predecessors, (110799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46254 states to 46254 states and 110799 transitions. [2021-06-05 20:32:47,945 INFO L78 Accepts]: Start accepts. Automaton has 46254 states and 110799 transitions. Word has length 36 [2021-06-05 20:32:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:47,945 INFO L482 AbstractCegarLoop]: Abstraction has 46254 states and 110799 transitions. [2021-06-05 20:32:47,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:47,945 INFO L276 IsEmpty]: Start isEmpty. Operand 46254 states and 110799 transitions. [2021-06-05 20:32:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 20:32:47,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:47,979 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:48,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 20:32:48,180 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:48,180 INFO L82 PathProgramCache]: Analyzing trace with hash 400249148, now seen corresponding path program 114 times [2021-06-05 20:32:48,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:48,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527472553] [2021-06-05 20:32:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:48,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:48,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527472553] [2021-06-05 20:32:48,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527472553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:48,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21394931] [2021-06-05 20:32:48,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:48,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 20:32:48,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:32:48,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:48,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21394931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:48,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:48,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 20:32:48,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640062600] [2021-06-05 20:32:48,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 20:32:48,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:48,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 20:32:48,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:48,415 INFO L87 Difference]: Start difference. First operand 46254 states and 110799 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:48,608 INFO L93 Difference]: Finished difference Result 58013 states and 139928 transitions. [2021-06-05 20:32:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:32:48,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 20:32:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:48,689 INFO L225 Difference]: With dead ends: 58013 [2021-06-05 20:32:48,690 INFO L226 Difference]: Without dead ends: 57971 [2021-06-05 20:32:48,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57971 states. [2021-06-05 20:32:49,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57971 to 49604. [2021-06-05 20:32:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49604 states, 49603 states have (on average 2.411446888293047) internal successors, (119615), 49603 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49604 states to 49604 states and 119615 transitions. [2021-06-05 20:32:49,637 INFO L78 Accepts]: Start accepts. Automaton has 49604 states and 119615 transitions. Word has length 36 [2021-06-05 20:32:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:49,637 INFO L482 AbstractCegarLoop]: Abstraction has 49604 states and 119615 transitions. [2021-06-05 20:32:49,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 49604 states and 119615 transitions. [2021-06-05 20:32:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 20:32:49,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:49,672 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:49,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 20:32:49,877 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:49,877 INFO L82 PathProgramCache]: Analyzing trace with hash -682833738, now seen corresponding path program 115 times [2021-06-05 20:32:49,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:49,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292296996] [2021-06-05 20:32:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:49,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:49,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292296996] [2021-06-05 20:32:49,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292296996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:49,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925263357] [2021-06-05 20:32:49,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:49,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:32:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:50,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925263357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:50,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:50,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 20:32:50,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975638673] [2021-06-05 20:32:50,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 20:32:50,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:50,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 20:32:50,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:50,003 INFO L87 Difference]: Start difference. First operand 49604 states and 119615 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:50,387 INFO L93 Difference]: Finished difference Result 64349 states and 155624 transitions. [2021-06-05 20:32:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:32:50,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 20:32:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:50,487 INFO L225 Difference]: With dead ends: 64349 [2021-06-05 20:32:50,487 INFO L226 Difference]: Without dead ends: 64310 [2021-06-05 20:32:50,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64310 states. [2021-06-05 20:32:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64310 to 54487. [2021-06-05 20:32:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54487 states, 54486 states have (on average 2.4248797856330064) internal successors, (132122), 54486 states have internal predecessors, (132122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54487 states to 54487 states and 132122 transitions. [2021-06-05 20:32:51,601 INFO L78 Accepts]: Start accepts. Automaton has 54487 states and 132122 transitions. Word has length 36 [2021-06-05 20:32:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:51,602 INFO L482 AbstractCegarLoop]: Abstraction has 54487 states and 132122 transitions. [2021-06-05 20:32:51,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 54487 states and 132122 transitions. [2021-06-05 20:32:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 20:32:51,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:51,638 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:51,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:51,840 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:51,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1284204284, now seen corresponding path program 116 times [2021-06-05 20:32:51,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:51,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245626293] [2021-06-05 20:32:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:51,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:51,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245626293] [2021-06-05 20:32:51,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245626293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:51,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561284009] [2021-06-05 20:32:51,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:51,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:32:51,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:51,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 20:32:51,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:32:51,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561284009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:51,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:51,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 20:32:51,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771124069] [2021-06-05 20:32:51,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 20:32:51,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:51,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 20:32:51,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:51,997 INFO L87 Difference]: Start difference. First operand 54487 states and 132122 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:52,382 INFO L93 Difference]: Finished difference Result 72236 states and 174914 transitions. [2021-06-05 20:32:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:32:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 20:32:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:52,496 INFO L225 Difference]: With dead ends: 72236 [2021-06-05 20:32:52,496 INFO L226 Difference]: Without dead ends: 72206 [2021-06-05 20:32:52,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:32:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72206 states. [2021-06-05 20:32:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72206 to 71835. [2021-06-05 20:32:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71835 states, 71834 states have (on average 2.423044797728095) internal successors, (174057), 71834 states have internal predecessors, (174057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71835 states to 71835 states and 174057 transitions. [2021-06-05 20:32:53,921 INFO L78 Accepts]: Start accepts. Automaton has 71835 states and 174057 transitions. Word has length 36 [2021-06-05 20:32:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:53,921 INFO L482 AbstractCegarLoop]: Abstraction has 71835 states and 174057 transitions. [2021-06-05 20:32:53,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:53,921 INFO L276 IsEmpty]: Start isEmpty. Operand 71835 states and 174057 transitions. [2021-06-05 20:32:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:32:53,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:53,987 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:54,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:54,188 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1734706531, now seen corresponding path program 117 times [2021-06-05 20:32:54,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:54,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715264981] [2021-06-05 20:32:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:54,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:54,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715264981] [2021-06-05 20:32:54,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715264981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:54,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425400161] [2021-06-05 20:32:54,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:54,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:32:54,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:54,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:32:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:54,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425400161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:54,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:54,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 20:32:54,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216703033] [2021-06-05 20:32:54,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:32:54,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:54,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:32:54,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:32:54,402 INFO L87 Difference]: Start difference. First operand 71835 states and 174057 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:55,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:55,143 INFO L93 Difference]: Finished difference Result 87796 states and 212272 transitions. [2021-06-05 20:32:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:32:55,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:32:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:55,281 INFO L225 Difference]: With dead ends: 87796 [2021-06-05 20:32:55,281 INFO L226 Difference]: Without dead ends: 87796 [2021-06-05 20:32:55,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:32:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87796 states. [2021-06-05 20:32:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87796 to 72340. [2021-06-05 20:32:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72340 states, 72339 states have (on average 2.4224692074814413) internal successors, (175239), 72339 states have internal predecessors, (175239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72340 states to 72340 states and 175239 transitions. [2021-06-05 20:32:56,732 INFO L78 Accepts]: Start accepts. Automaton has 72340 states and 175239 transitions. Word has length 39 [2021-06-05 20:32:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:56,732 INFO L482 AbstractCegarLoop]: Abstraction has 72340 states and 175239 transitions. [2021-06-05 20:32:56,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 72340 states and 175239 transitions. [2021-06-05 20:32:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:32:56,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:56,802 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:32:57,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 20:32:57,003 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:32:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:32:57,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1443800209, now seen corresponding path program 118 times [2021-06-05 20:32:57,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:32:57,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852904074] [2021-06-05 20:32:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:32:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:32:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:57,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:32:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852904074] [2021-06-05 20:32:57,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852904074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376291393] [2021-06-05 20:32:57,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:32:57,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:32:57,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:32:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:32:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:32:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:32:57,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376291393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:32:57,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:32:57,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 20:32:57,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518051985] [2021-06-05 20:32:57,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:32:57,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:32:57,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:32:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:32:57,195 INFO L87 Difference]: Start difference. First operand 72340 states and 175239 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:32:57,874 INFO L93 Difference]: Finished difference Result 103043 states and 246926 transitions. [2021-06-05 20:32:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:32:57,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:32:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:32:58,050 INFO L225 Difference]: With dead ends: 103043 [2021-06-05 20:32:58,050 INFO L226 Difference]: Without dead ends: 102999 [2021-06-05 20:32:58,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:32:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102999 states. [2021-06-05 20:32:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102999 to 72340. [2021-06-05 20:32:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72340 states, 72339 states have (on average 2.4224415598777975) internal successors, (175237), 72339 states have internal predecessors, (175237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72340 states to 72340 states and 175237 transitions. [2021-06-05 20:32:59,750 INFO L78 Accepts]: Start accepts. Automaton has 72340 states and 175237 transitions. Word has length 39 [2021-06-05 20:32:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:32:59,750 INFO L482 AbstractCegarLoop]: Abstraction has 72340 states and 175237 transitions. [2021-06-05 20:32:59,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:32:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 72340 states and 175237 transitions. [2021-06-05 20:32:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:32:59,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:32:59,822 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:00,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:00,022 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1709831425, now seen corresponding path program 119 times [2021-06-05 20:33:00,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:00,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298148902] [2021-06-05 20:33:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:00,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:00,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298148902] [2021-06-05 20:33:00,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298148902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:00,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770478215] [2021-06-05 20:33:00,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:00,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 20:33:00,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:00,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:00,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:00,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770478215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:00,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:00,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:33:00,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713402811] [2021-06-05 20:33:00,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:00,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:00,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:00,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:00,226 INFO L87 Difference]: Start difference. First operand 72340 states and 175237 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:01,991 INFO L93 Difference]: Finished difference Result 115613 states and 277046 transitions. [2021-06-05 20:33:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 20:33:01,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:02,166 INFO L225 Difference]: With dead ends: 115613 [2021-06-05 20:33:02,166 INFO L226 Difference]: Without dead ends: 115597 [2021-06-05 20:33:02,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4208 ImplicationChecksByTransitivity, 1228.7ms TimeCoverageRelationStatistics Valid=2730, Invalid=7170, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 20:33:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115597 states. [2021-06-05 20:33:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115597 to 85080. [2021-06-05 20:33:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85080 states, 85079 states have (on average 2.432468646787104) internal successors, (206952), 85079 states have internal predecessors, (206952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85080 states to 85080 states and 206952 transitions. [2021-06-05 20:33:04,118 INFO L78 Accepts]: Start accepts. Automaton has 85080 states and 206952 transitions. Word has length 39 [2021-06-05 20:33:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:04,119 INFO L482 AbstractCegarLoop]: Abstraction has 85080 states and 206952 transitions. [2021-06-05 20:33:04,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 85080 states and 206952 transitions. [2021-06-05 20:33:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:04,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:04,201 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:04,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:04,402 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:04,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1014479359, now seen corresponding path program 120 times [2021-06-05 20:33:04,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:04,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919356202] [2021-06-05 20:33:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:04,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919356202] [2021-06-05 20:33:04,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919356202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507463857] [2021-06-05 20:33:04,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:04,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 20:33:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:04,784 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 20:33:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:04,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507463857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:04,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:04,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:33:04,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653404119] [2021-06-05 20:33:04,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:04,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:04,912 INFO L87 Difference]: Start difference. First operand 85080 states and 206952 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:05,994 INFO L93 Difference]: Finished difference Result 95032 states and 229951 transitions. [2021-06-05 20:33:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 20:33:05,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:06,142 INFO L225 Difference]: With dead ends: 95032 [2021-06-05 20:33:06,142 INFO L226 Difference]: Without dead ends: 95028 [2021-06-05 20:33:06,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 631.7ms TimeCoverageRelationStatistics Valid=1640, Invalid=3190, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 20:33:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95028 states. [2021-06-05 20:33:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95028 to 86959. [2021-06-05 20:33:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86959 states, 86958 states have (on average 2.435647093999402) internal successors, (211799), 86958 states have internal predecessors, (211799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86959 states to 86959 states and 211799 transitions. [2021-06-05 20:33:08,041 INFO L78 Accepts]: Start accepts. Automaton has 86959 states and 211799 transitions. Word has length 39 [2021-06-05 20:33:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:08,041 INFO L482 AbstractCegarLoop]: Abstraction has 86959 states and 211799 transitions. [2021-06-05 20:33:08,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 86959 states and 211799 transitions. [2021-06-05 20:33:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:08,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:08,120 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:08,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:08,324 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:08,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1581610245, now seen corresponding path program 121 times [2021-06-05 20:33:08,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:08,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282131572] [2021-06-05 20:33:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:08,609 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 20:33:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:08,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:08,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282131572] [2021-06-05 20:33:08,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282131572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:08,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500575685] [2021-06-05 20:33:08,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:08,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:08,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500575685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:08,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:08,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:33:08,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199345631] [2021-06-05 20:33:08,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:08,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:08,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:08,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:08,834 INFO L87 Difference]: Start difference. First operand 86959 states and 211799 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:10,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:10,277 INFO L93 Difference]: Finished difference Result 96305 states and 232642 transitions. [2021-06-05 20:33:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 20:33:10,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:10,423 INFO L225 Difference]: With dead ends: 96305 [2021-06-05 20:33:10,423 INFO L226 Difference]: Without dead ends: 96305 [2021-06-05 20:33:10,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 1145.1ms TimeCoverageRelationStatistics Valid=2216, Invalid=4426, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 20:33:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96305 states. [2021-06-05 20:33:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96305 to 83214. [2021-06-05 20:33:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83214 states, 83213 states have (on average 2.4312667491858244) internal successors, (202313), 83213 states have internal predecessors, (202313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83214 states to 83214 states and 202313 transitions. [2021-06-05 20:33:12,194 INFO L78 Accepts]: Start accepts. Automaton has 83214 states and 202313 transitions. Word has length 39 [2021-06-05 20:33:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:12,194 INFO L482 AbstractCegarLoop]: Abstraction has 83214 states and 202313 transitions. [2021-06-05 20:33:12,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 83214 states and 202313 transitions. [2021-06-05 20:33:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:12,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:12,267 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:12,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 20:33:12,469 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1229883493, now seen corresponding path program 122 times [2021-06-05 20:33:12,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:12,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85937713] [2021-06-05 20:33:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:12,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:12,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85937713] [2021-06-05 20:33:12,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85937713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:12,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183426865] [2021-06-05 20:33:12,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:12,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:12,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:12,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183426865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:12,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:12,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:33:12,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914359074] [2021-06-05 20:33:12,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:12,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:12,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:12,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:12,718 INFO L87 Difference]: Start difference. First operand 83214 states and 202313 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:14,223 INFO L93 Difference]: Finished difference Result 112915 states and 270630 transitions. [2021-06-05 20:33:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 20:33:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:14,406 INFO L225 Difference]: With dead ends: 112915 [2021-06-05 20:33:14,406 INFO L226 Difference]: Without dead ends: 112909 [2021-06-05 20:33:14,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:33:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112909 states. [2021-06-05 20:33:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112909 to 76444. [2021-06-05 20:33:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76444 states, 76443 states have (on average 2.4206402155854687) internal successors, (185041), 76443 states have internal predecessors, (185041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76444 states to 76444 states and 185041 transitions. [2021-06-05 20:33:16,338 INFO L78 Accepts]: Start accepts. Automaton has 76444 states and 185041 transitions. Word has length 39 [2021-06-05 20:33:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:16,338 INFO L482 AbstractCegarLoop]: Abstraction has 76444 states and 185041 transitions. [2021-06-05 20:33:16,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 76444 states and 185041 transitions. [2021-06-05 20:33:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:16,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:16,409 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:16,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 20:33:16,610 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1736229759, now seen corresponding path program 123 times [2021-06-05 20:33:16,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:16,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871159393] [2021-06-05 20:33:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:16,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:16,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871159393] [2021-06-05 20:33:16,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871159393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:16,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144537105] [2021-06-05 20:33:16,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:16,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 20:33:16,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:16,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:16,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:16,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144537105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:16,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:16,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:33:16,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342375666] [2021-06-05 20:33:16,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:16,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:16,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:16,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:16,806 INFO L87 Difference]: Start difference. First operand 76444 states and 185041 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:18,069 INFO L93 Difference]: Finished difference Result 107640 states and 257630 transitions. [2021-06-05 20:33:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 20:33:18,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:18,295 INFO L225 Difference]: With dead ends: 107640 [2021-06-05 20:33:18,296 INFO L226 Difference]: Without dead ends: 107616 [2021-06-05 20:33:18,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:33:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107616 states. [2021-06-05 20:33:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107616 to 77070. [2021-06-05 20:33:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77070 states, 77069 states have (on average 2.4197148010224603) internal successors, (186485), 77069 states have internal predecessors, (186485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77070 states to 77070 states and 186485 transitions. [2021-06-05 20:33:19,858 INFO L78 Accepts]: Start accepts. Automaton has 77070 states and 186485 transitions. Word has length 39 [2021-06-05 20:33:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:19,858 INFO L482 AbstractCegarLoop]: Abstraction has 77070 states and 186485 transitions. [2021-06-05 20:33:19,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 77070 states and 186485 transitions. [2021-06-05 20:33:19,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:19,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:19,927 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:20,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 20:33:20,127 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:20,128 INFO L82 PathProgramCache]: Analyzing trace with hash 5106399, now seen corresponding path program 124 times [2021-06-05 20:33:20,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:20,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970680476] [2021-06-05 20:33:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:20,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:20,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970680476] [2021-06-05 20:33:20,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970680476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:20,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771661171] [2021-06-05 20:33:20,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:20,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:33:20,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:20,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:20,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:20,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771661171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:20,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:20,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:33:20,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973231561] [2021-06-05 20:33:20,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:20,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:20,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:20,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:20,331 INFO L87 Difference]: Start difference. First operand 77070 states and 186485 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:21,585 INFO L93 Difference]: Finished difference Result 109601 states and 262473 transitions. [2021-06-05 20:33:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 20:33:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:21,781 INFO L225 Difference]: With dead ends: 109601 [2021-06-05 20:33:21,781 INFO L226 Difference]: Without dead ends: 109559 [2021-06-05 20:33:21,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=749, Invalid=2557, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:33:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109559 states. [2021-06-05 20:33:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109559 to 77279. [2021-06-05 20:33:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77279 states, 77278 states have (on average 2.419705478920262) internal successors, (186990), 77278 states have internal predecessors, (186990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77279 states to 77279 states and 186990 transitions. [2021-06-05 20:33:23,691 INFO L78 Accepts]: Start accepts. Automaton has 77279 states and 186990 transitions. Word has length 39 [2021-06-05 20:33:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:23,691 INFO L482 AbstractCegarLoop]: Abstraction has 77279 states and 186990 transitions. [2021-06-05 20:33:23,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 77279 states and 186990 transitions. [2021-06-05 20:33:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:23,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:23,760 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:23,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 20:33:23,963 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:23,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:23,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1535588289, now seen corresponding path program 125 times [2021-06-05 20:33:23,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:23,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919380766] [2021-06-05 20:33:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:24,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:24,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919380766] [2021-06-05 20:33:24,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919380766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:24,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791519898] [2021-06-05 20:33:24,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:24,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 20:33:24,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:24,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:24,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:24,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791519898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:24,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:24,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:33:24,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295267271] [2021-06-05 20:33:24,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:24,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:24,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:24,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:24,177 INFO L87 Difference]: Start difference. First operand 77279 states and 186990 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:25,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:25,060 INFO L93 Difference]: Finished difference Result 111260 states and 266286 transitions. [2021-06-05 20:33:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 20:33:25,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:25,242 INFO L225 Difference]: With dead ends: 111260 [2021-06-05 20:33:25,242 INFO L226 Difference]: Without dead ends: 111200 [2021-06-05 20:33:25,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=673, Invalid=2297, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 20:33:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111200 states. [2021-06-05 20:33:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111200 to 77575. [2021-06-05 20:33:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77575 states, 77574 states have (on average 2.4191739500348053) internal successors, (187665), 77574 states have internal predecessors, (187665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77575 states to 77575 states and 187665 transitions. [2021-06-05 20:33:27,206 INFO L78 Accepts]: Start accepts. Automaton has 77575 states and 187665 transitions. Word has length 39 [2021-06-05 20:33:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:27,207 INFO L482 AbstractCegarLoop]: Abstraction has 77575 states and 187665 transitions. [2021-06-05 20:33:27,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 77575 states and 187665 transitions. [2021-06-05 20:33:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:27,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:27,275 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:27,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 20:33:27,476 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash 748758943, now seen corresponding path program 126 times [2021-06-05 20:33:27,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:27,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096444774] [2021-06-05 20:33:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:27,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:27,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096444774] [2021-06-05 20:33:27,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096444774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:27,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437134427] [2021-06-05 20:33:27,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:27,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 20:33:27,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:27,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:27,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:27,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437134427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:27,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:27,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:33:27,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722714307] [2021-06-05 20:33:27,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:27,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:27,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:27,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:27,673 INFO L87 Difference]: Start difference. First operand 77575 states and 187665 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:28,639 INFO L93 Difference]: Finished difference Result 105074 states and 251301 transitions. [2021-06-05 20:33:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 20:33:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:28,851 INFO L225 Difference]: With dead ends: 105074 [2021-06-05 20:33:28,852 INFO L226 Difference]: Without dead ends: 105035 [2021-06-05 20:33:28,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=455, Invalid=1437, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 20:33:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105035 states. [2021-06-05 20:33:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105035 to 77575. [2021-06-05 20:33:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77575 states, 77574 states have (on average 2.4189161316936088) internal successors, (187645), 77574 states have internal predecessors, (187645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77575 states to 77575 states and 187645 transitions. [2021-06-05 20:33:30,379 INFO L78 Accepts]: Start accepts. Automaton has 77575 states and 187645 transitions. Word has length 39 [2021-06-05 20:33:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:30,379 INFO L482 AbstractCegarLoop]: Abstraction has 77575 states and 187645 transitions. [2021-06-05 20:33:30,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 77575 states and 187645 transitions. [2021-06-05 20:33:30,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:30,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:30,446 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:30,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:30,647 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:30,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:30,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1349178169, now seen corresponding path program 127 times [2021-06-05 20:33:30,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:30,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888403186] [2021-06-05 20:33:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:30,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:30,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888403186] [2021-06-05 20:33:30,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888403186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:30,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786922890] [2021-06-05 20:33:30,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:30,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:30,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786922890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:30,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:30,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 20:33:30,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942009811] [2021-06-05 20:33:30,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:33:30,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:30,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:33:30,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:33:30,859 INFO L87 Difference]: Start difference. First operand 77575 states and 187645 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:31,624 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 20:33:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:32,228 INFO L93 Difference]: Finished difference Result 85405 states and 205881 transitions. [2021-06-05 20:33:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 20:33:32,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:32,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:32,345 INFO L225 Difference]: With dead ends: 85405 [2021-06-05 20:33:32,345 INFO L226 Difference]: Without dead ends: 85385 [2021-06-05 20:33:32,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 992.2ms TimeCoverageRelationStatistics Valid=1789, Invalid=3911, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 20:33:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85385 states. [2021-06-05 20:33:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85385 to 80652. [2021-06-05 20:33:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80652 states, 80651 states have (on average 2.420155980706997) internal successors, (195188), 80651 states have internal predecessors, (195188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80652 states to 80652 states and 195188 transitions. [2021-06-05 20:33:34,335 INFO L78 Accepts]: Start accepts. Automaton has 80652 states and 195188 transitions. Word has length 39 [2021-06-05 20:33:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:34,336 INFO L482 AbstractCegarLoop]: Abstraction has 80652 states and 195188 transitions. [2021-06-05 20:33:34,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 80652 states and 195188 transitions. [2021-06-05 20:33:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:34,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:34,403 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:34,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 20:33:34,604 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:34,604 INFO L82 PathProgramCache]: Analyzing trace with hash -79298119, now seen corresponding path program 128 times [2021-06-05 20:33:34,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:34,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4795660] [2021-06-05 20:33:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:34,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:34,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4795660] [2021-06-05 20:33:34,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4795660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:34,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646301294] [2021-06-05 20:33:34,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:34,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:34,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:34,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646301294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:34,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:34,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 20:33:34,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212495225] [2021-06-05 20:33:34,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:34,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:34,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:34,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:34,807 INFO L87 Difference]: Start difference. First operand 80652 states and 195188 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:36,127 INFO L93 Difference]: Finished difference Result 87473 states and 210141 transitions. [2021-06-05 20:33:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 20:33:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:36,252 INFO L225 Difference]: With dead ends: 87473 [2021-06-05 20:33:36,252 INFO L226 Difference]: Without dead ends: 87452 [2021-06-05 20:33:36,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=2125, Invalid=4355, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 20:33:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87452 states. [2021-06-05 20:33:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87452 to 74945. [2021-06-05 20:33:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74945 states, 74944 states have (on average 2.4166844577284374) internal successors, (181116), 74944 states have internal predecessors, (181116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74945 states to 74945 states and 181116 transitions. [2021-06-05 20:33:38,310 INFO L78 Accepts]: Start accepts. Automaton has 74945 states and 181116 transitions. Word has length 39 [2021-06-05 20:33:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:38,310 INFO L482 AbstractCegarLoop]: Abstraction has 74945 states and 181116 transitions. [2021-06-05 20:33:38,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 74945 states and 181116 transitions. [2021-06-05 20:33:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:38,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:38,364 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:38,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:38,565 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash -639470465, now seen corresponding path program 129 times [2021-06-05 20:33:38,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:38,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246544697] [2021-06-05 20:33:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:38,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246544697] [2021-06-05 20:33:38,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246544697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299682837] [2021-06-05 20:33:38,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:38,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 20:33:38,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:38,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:38,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:38,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299682837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:38,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:38,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 20:33:38,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976009322] [2021-06-05 20:33:38,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:33:38,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:38,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:33:38,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:33:38,793 INFO L87 Difference]: Start difference. First operand 74945 states and 181116 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:40,286 INFO L93 Difference]: Finished difference Result 85693 states and 206211 transitions. [2021-06-05 20:33:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 20:33:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:40,413 INFO L225 Difference]: With dead ends: 85693 [2021-06-05 20:33:40,413 INFO L226 Difference]: Without dead ends: 85647 [2021-06-05 20:33:40,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 763.7ms TimeCoverageRelationStatistics Valid=1791, Invalid=4371, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 20:33:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85647 states. [2021-06-05 20:33:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85647 to 78351. [2021-06-05 20:33:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78351 states, 78350 states have (on average 2.4164262922782385) internal successors, (189327), 78350 states have internal predecessors, (189327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78351 states to 78351 states and 189327 transitions. [2021-06-05 20:33:42,069 INFO L78 Accepts]: Start accepts. Automaton has 78351 states and 189327 transitions. Word has length 39 [2021-06-05 20:33:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:42,069 INFO L482 AbstractCegarLoop]: Abstraction has 78351 states and 189327 transitions. [2021-06-05 20:33:42,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 78351 states and 189327 transitions. [2021-06-05 20:33:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:42,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:42,140 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:42,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:42,341 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2083991813, now seen corresponding path program 130 times [2021-06-05 20:33:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:42,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364172928] [2021-06-05 20:33:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:42,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:42,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364172928] [2021-06-05 20:33:42,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364172928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:42,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6821536] [2021-06-05 20:33:42,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:42,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:33:42,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6821536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:42,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:42,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 20:33:42,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113238538] [2021-06-05 20:33:42,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:42,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:42,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:42,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:42,540 INFO L87 Difference]: Start difference. First operand 78351 states and 189327 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:44,223 INFO L93 Difference]: Finished difference Result 89679 states and 215178 transitions. [2021-06-05 20:33:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 20:33:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:44,352 INFO L225 Difference]: With dead ends: 89679 [2021-06-05 20:33:44,353 INFO L226 Difference]: Without dead ends: 89646 [2021-06-05 20:33:44,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2591 ImplicationChecksByTransitivity, 949.3ms TimeCoverageRelationStatistics Valid=2600, Invalid=5410, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 20:33:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89646 states. [2021-06-05 20:33:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89646 to 75685. [2021-06-05 20:33:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75685 states, 75684 states have (on average 2.4186089530151684) internal successors, (183050), 75684 states have internal predecessors, (183050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75685 states to 75685 states and 183050 transitions. [2021-06-05 20:33:46,152 INFO L78 Accepts]: Start accepts. Automaton has 75685 states and 183050 transitions. Word has length 39 [2021-06-05 20:33:46,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:46,152 INFO L482 AbstractCegarLoop]: Abstraction has 75685 states and 183050 transitions. [2021-06-05 20:33:46,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:46,152 INFO L276 IsEmpty]: Start isEmpty. Operand 75685 states and 183050 transitions. [2021-06-05 20:33:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:46,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:46,230 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:46,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:46,430 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:46,431 INFO L82 PathProgramCache]: Analyzing trace with hash 307955065, now seen corresponding path program 131 times [2021-06-05 20:33:46,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:46,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650985481] [2021-06-05 20:33:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:46,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:46,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650985481] [2021-06-05 20:33:46,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650985481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:46,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460742118] [2021-06-05 20:33:46,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:46,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 20:33:46,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:46,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:46,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:46,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460742118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:46,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:46,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 20:33:46,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420507451] [2021-06-05 20:33:46,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:33:46,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:33:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:33:46,658 INFO L87 Difference]: Start difference. First operand 75685 states and 183050 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:47,845 INFO L93 Difference]: Finished difference Result 88158 states and 211586 transitions. [2021-06-05 20:33:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 20:33:47,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:47,973 INFO L225 Difference]: With dead ends: 88158 [2021-06-05 20:33:47,973 INFO L226 Difference]: Without dead ends: 88086 [2021-06-05 20:33:47,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 817.8ms TimeCoverageRelationStatistics Valid=1801, Invalid=4841, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 20:33:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88086 states. [2021-06-05 20:33:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88086 to 77438. [2021-06-05 20:33:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77438 states, 77437 states have (on average 2.4165579761612666) internal successors, (187131), 77437 states have internal predecessors, (187131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77438 states to 77438 states and 187131 transitions. [2021-06-05 20:33:49,848 INFO L78 Accepts]: Start accepts. Automaton has 77438 states and 187131 transitions. Word has length 39 [2021-06-05 20:33:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:49,848 INFO L482 AbstractCegarLoop]: Abstraction has 77438 states and 187131 transitions. [2021-06-05 20:33:49,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 77438 states and 187131 transitions. [2021-06-05 20:33:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:49,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:49,917 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:50,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:50,118 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:50,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1901388409, now seen corresponding path program 132 times [2021-06-05 20:33:50,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:50,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378338474] [2021-06-05 20:33:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:50,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:50,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378338474] [2021-06-05 20:33:50,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378338474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:50,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456255889] [2021-06-05 20:33:50,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:50,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 20:33:50,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:50,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:50,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:50,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456255889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:50,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:50,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 20:33:50,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638019947] [2021-06-05 20:33:50,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:50,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:50,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:50,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:50,324 INFO L87 Difference]: Start difference. First operand 77438 states and 187131 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:51,295 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-06-05 20:33:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:52,200 INFO L93 Difference]: Finished difference Result 94434 states and 226265 transitions. [2021-06-05 20:33:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 20:33:52,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:52,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:52,338 INFO L225 Difference]: With dead ends: 94434 [2021-06-05 20:33:52,338 INFO L226 Difference]: Without dead ends: 94410 [2021-06-05 20:33:52,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4066 ImplicationChecksByTransitivity, 1401.4ms TimeCoverageRelationStatistics Valid=3456, Invalid=7464, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 20:33:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94410 states. [2021-06-05 20:33:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94410 to 80576. [2021-06-05 20:33:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80576 states, 80575 states have (on average 2.417226186782501) internal successors, (194768), 80575 states have internal predecessors, (194768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80576 states to 80576 states and 194768 transitions. [2021-06-05 20:33:54,328 INFO L78 Accepts]: Start accepts. Automaton has 80576 states and 194768 transitions. Word has length 39 [2021-06-05 20:33:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:54,328 INFO L482 AbstractCegarLoop]: Abstraction has 80576 states and 194768 transitions. [2021-06-05 20:33:54,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 80576 states and 194768 transitions. [2021-06-05 20:33:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:54,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:54,399 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:54,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 20:33:54,599 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1463150017, now seen corresponding path program 133 times [2021-06-05 20:33:54,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:54,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204706498] [2021-06-05 20:33:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:54,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:54,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204706498] [2021-06-05 20:33:54,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204706498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:54,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600772901] [2021-06-05 20:33:54,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:54,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:54,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:54,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600772901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:54,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:54,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 20:33:54,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055685086] [2021-06-05 20:33:54,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:33:54,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:54,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:33:54,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:33:54,839 INFO L87 Difference]: Start difference. First operand 80576 states and 194768 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:56,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:33:56,131 INFO L93 Difference]: Finished difference Result 93358 states and 223825 transitions. [2021-06-05 20:33:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 20:33:56,131 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:33:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:33:56,267 INFO L225 Difference]: With dead ends: 93358 [2021-06-05 20:33:56,267 INFO L226 Difference]: Without dead ends: 93262 [2021-06-05 20:33:56,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 929.9ms TimeCoverageRelationStatistics Valid=1826, Invalid=5314, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 20:33:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93262 states. [2021-06-05 20:33:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93262 to 83364. [2021-06-05 20:33:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83364 states, 83363 states have (on average 2.4146323908688507) internal successors, (201291), 83363 states have internal predecessors, (201291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83364 states to 83364 states and 201291 transitions. [2021-06-05 20:33:58,218 INFO L78 Accepts]: Start accepts. Automaton has 83364 states and 201291 transitions. Word has length 39 [2021-06-05 20:33:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:33:58,218 INFO L482 AbstractCegarLoop]: Abstraction has 83364 states and 201291 transitions. [2021-06-05 20:33:58,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 83364 states and 201291 transitions. [2021-06-05 20:33:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:33:58,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:33:58,292 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:33:58,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 20:33:58,493 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:33:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:33:58,493 INFO L82 PathProgramCache]: Analyzing trace with hash 287651387, now seen corresponding path program 134 times [2021-06-05 20:33:58,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:33:58,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520567488] [2021-06-05 20:33:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:33:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:33:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:58,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:33:58,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520567488] [2021-06-05 20:33:58,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520567488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:58,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586522397] [2021-06-05 20:33:58,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:33:58,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:33:58,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:33:58,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:33:58,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:33:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:33:58,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586522397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:33:58,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:33:58,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 20:33:58,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071443304] [2021-06-05 20:33:58,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:33:58,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:33:58,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:33:58,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:33:58,714 INFO L87 Difference]: Start difference. First operand 83364 states and 201291 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:33:59,855 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-06-05 20:34:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:00,942 INFO L93 Difference]: Finished difference Result 108266 states and 259625 transitions. [2021-06-05 20:34:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 20:34:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:01,114 INFO L225 Difference]: With dead ends: 108266 [2021-06-05 20:34:01,114 INFO L226 Difference]: Without dead ends: 108245 [2021-06-05 20:34:01,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4522 ImplicationChecksByTransitivity, 1658.4ms TimeCoverageRelationStatistics Valid=3252, Invalid=7254, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 20:34:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108245 states. [2021-06-05 20:34:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108245 to 94714. [2021-06-05 20:34:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94714 states, 94713 states have (on average 2.413248445303179) internal successors, (228566), 94713 states have internal predecessors, (228566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94714 states to 94714 states and 228566 transitions. [2021-06-05 20:34:03,264 INFO L78 Accepts]: Start accepts. Automaton has 94714 states and 228566 transitions. Word has length 39 [2021-06-05 20:34:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:03,264 INFO L482 AbstractCegarLoop]: Abstraction has 94714 states and 228566 transitions. [2021-06-05 20:34:03,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 94714 states and 228566 transitions. [2021-06-05 20:34:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:03,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:03,345 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:03,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 20:34:03,545 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:03,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1240461027, now seen corresponding path program 135 times [2021-06-05 20:34:03,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:03,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055806883] [2021-06-05 20:34:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:03,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:03,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055806883] [2021-06-05 20:34:03,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055806883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:03,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036693788] [2021-06-05 20:34:03,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:03,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:34:03,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:03,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:03,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:03,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036693788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:03,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:03,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 20:34:03,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827520465] [2021-06-05 20:34:03,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:34:03,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:03,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:34:03,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:34:03,728 INFO L87 Difference]: Start difference. First operand 94714 states and 228566 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:04,282 INFO L93 Difference]: Finished difference Result 104572 states and 251946 transitions. [2021-06-05 20:34:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:34:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:04,453 INFO L225 Difference]: With dead ends: 104572 [2021-06-05 20:34:04,453 INFO L226 Difference]: Without dead ends: 104572 [2021-06-05 20:34:04,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:34:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104572 states. [2021-06-05 20:34:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104572 to 95063. [2021-06-05 20:34:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95063 states, 95062 states have (on average 2.4134670004838945) internal successors, (229429), 95062 states have internal predecessors, (229429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95063 states to 95063 states and 229429 transitions. [2021-06-05 20:34:06,816 INFO L78 Accepts]: Start accepts. Automaton has 95063 states and 229429 transitions. Word has length 39 [2021-06-05 20:34:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:06,816 INFO L482 AbstractCegarLoop]: Abstraction has 95063 states and 229429 transitions. [2021-06-05 20:34:06,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 95063 states and 229429 transitions. [2021-06-05 20:34:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:06,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:06,908 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:07,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 20:34:07,117 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash -189342279, now seen corresponding path program 136 times [2021-06-05 20:34:07,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:07,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928981591] [2021-06-05 20:34:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:07,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:07,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928981591] [2021-06-05 20:34:07,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928981591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:07,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705798486] [2021-06-05 20:34:07,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:07,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:34:07,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:07,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:07,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705798486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:07,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:07,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 20:34:07,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604940292] [2021-06-05 20:34:07,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:34:07,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:07,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:34:07,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:34:07,338 INFO L87 Difference]: Start difference. First operand 95063 states and 229429 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:08,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:08,277 INFO L93 Difference]: Finished difference Result 111323 states and 266450 transitions. [2021-06-05 20:34:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 20:34:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:08,553 INFO L225 Difference]: With dead ends: 111323 [2021-06-05 20:34:08,553 INFO L226 Difference]: Without dead ends: 111295 [2021-06-05 20:34:08,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2021-06-05 20:34:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111295 states. [2021-06-05 20:34:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111295 to 95063. [2021-06-05 20:34:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95063 states, 95062 states have (on average 2.413456481033431) internal successors, (229428), 95062 states have internal predecessors, (229428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95063 states to 95063 states and 229428 transitions. [2021-06-05 20:34:10,307 INFO L78 Accepts]: Start accepts. Automaton has 95063 states and 229428 transitions. Word has length 39 [2021-06-05 20:34:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:10,307 INFO L482 AbstractCegarLoop]: Abstraction has 95063 states and 229428 transitions. [2021-06-05 20:34:10,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 95063 states and 229428 transitions. [2021-06-05 20:34:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:10,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:10,389 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:10,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:10,589 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1791513985, now seen corresponding path program 137 times [2021-06-05 20:34:10,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:10,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394384622] [2021-06-05 20:34:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:10,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:10,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394384622] [2021-06-05 20:34:10,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394384622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:10,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116699223] [2021-06-05 20:34:10,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:10,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 20:34:10,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:10,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116699223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:10,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:10,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037810571] [2021-06-05 20:34:10,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:10,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:10,784 INFO L87 Difference]: Start difference. First operand 95063 states and 229428 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:11,788 INFO L93 Difference]: Finished difference Result 102222 states and 245452 transitions. [2021-06-05 20:34:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 20:34:11,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:11,949 INFO L225 Difference]: With dead ends: 102222 [2021-06-05 20:34:11,949 INFO L226 Difference]: Without dead ends: 102222 [2021-06-05 20:34:11,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 20:34:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102222 states. [2021-06-05 20:34:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102222 to 95470. [2021-06-05 20:34:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95470 states, 95469 states have (on average 2.4134116833736607) internal successors, (230406), 95469 states have internal predecessors, (230406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95470 states to 95470 states and 230406 transitions. [2021-06-05 20:34:13,766 INFO L78 Accepts]: Start accepts. Automaton has 95470 states and 230406 transitions. Word has length 39 [2021-06-05 20:34:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:13,767 INFO L482 AbstractCegarLoop]: Abstraction has 95470 states and 230406 transitions. [2021-06-05 20:34:13,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 95470 states and 230406 transitions. [2021-06-05 20:34:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:13,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:13,847 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:14,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 20:34:14,047 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:14,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:14,047 INFO L82 PathProgramCache]: Analyzing trace with hash -146808195, now seen corresponding path program 138 times [2021-06-05 20:34:14,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:14,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980088953] [2021-06-05 20:34:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:14,489 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 20:34:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:14,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:14,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980088953] [2021-06-05 20:34:14,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980088953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:14,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758308687] [2021-06-05 20:34:14,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:14,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:34:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:14,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:14,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758308687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:14,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:14,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:14,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471303818] [2021-06-05 20:34:14,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:14,688 INFO L87 Difference]: Start difference. First operand 95470 states and 230406 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:15,395 INFO L93 Difference]: Finished difference Result 112109 states and 268044 transitions. [2021-06-05 20:34:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 20:34:15,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:15,574 INFO L225 Difference]: With dead ends: 112109 [2021-06-05 20:34:15,574 INFO L226 Difference]: Without dead ends: 112083 [2021-06-05 20:34:15,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 793.7ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 20:34:15,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112083 states. [2021-06-05 20:34:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112083 to 98750. [2021-06-05 20:34:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98750 states, 98749 states have (on average 2.416277633191222) internal successors, (238605), 98749 states have internal predecessors, (238605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98750 states to 98750 states and 238605 transitions. [2021-06-05 20:34:17,814 INFO L78 Accepts]: Start accepts. Automaton has 98750 states and 238605 transitions. Word has length 39 [2021-06-05 20:34:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:17,814 INFO L482 AbstractCegarLoop]: Abstraction has 98750 states and 238605 transitions. [2021-06-05 20:34:17,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 98750 states and 238605 transitions. [2021-06-05 20:34:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:17,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:17,895 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:18,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 20:34:18,096 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:18,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1574053705, now seen corresponding path program 139 times [2021-06-05 20:34:18,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:18,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411029678] [2021-06-05 20:34:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:18,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:18,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411029678] [2021-06-05 20:34:18,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411029678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:18,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689690991] [2021-06-05 20:34:18,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:18,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:18,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:18,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689690991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:18,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:18,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:18,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837954788] [2021-06-05 20:34:18,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:18,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:18,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:18,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:18,285 INFO L87 Difference]: Start difference. First operand 98750 states and 238605 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:20,107 INFO L93 Difference]: Finished difference Result 108390 states and 260327 transitions. [2021-06-05 20:34:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 20:34:20,107 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:20,415 INFO L225 Difference]: With dead ends: 108390 [2021-06-05 20:34:20,416 INFO L226 Difference]: Without dead ends: 108390 [2021-06-05 20:34:20,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=1357, Invalid=3065, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 20:34:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108390 states. [2021-06-05 20:34:21,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108390 to 100062. [2021-06-05 20:34:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100062 states, 100061 states have (on average 2.4149268945942977) internal successors, (241640), 100061 states have internal predecessors, (241640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100062 states to 100062 states and 241640 transitions. [2021-06-05 20:34:22,222 INFO L78 Accepts]: Start accepts. Automaton has 100062 states and 241640 transitions. Word has length 39 [2021-06-05 20:34:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:22,222 INFO L482 AbstractCegarLoop]: Abstraction has 100062 states and 241640 transitions. [2021-06-05 20:34:22,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 100062 states and 241640 transitions. [2021-06-05 20:34:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:22,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:22,305 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:22,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:22,509 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:22,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1975177593, now seen corresponding path program 140 times [2021-06-05 20:34:22,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:22,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733034542] [2021-06-05 20:34:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:22,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:22,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733034542] [2021-06-05 20:34:22,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733034542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:22,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978277296] [2021-06-05 20:34:22,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:22,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:22,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:22,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:22,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:22,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978277296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:22,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:22,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:22,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386868112] [2021-06-05 20:34:22,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:22,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:22,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:22,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:22,705 INFO L87 Difference]: Start difference. First operand 100062 states and 241640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:24,031 INFO L93 Difference]: Finished difference Result 136429 states and 327004 transitions. [2021-06-05 20:34:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 20:34:24,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:24,254 INFO L225 Difference]: With dead ends: 136429 [2021-06-05 20:34:24,254 INFO L226 Difference]: Without dead ends: 136389 [2021-06-05 20:34:24,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 522.4ms TimeCoverageRelationStatistics Valid=751, Invalid=2555, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:34:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136389 states. [2021-06-05 20:34:26,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136389 to 112799. [2021-06-05 20:34:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112799 states, 112798 states have (on average 2.409315768010071) internal successors, (271766), 112798 states have internal predecessors, (271766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112799 states to 112799 states and 271766 transitions. [2021-06-05 20:34:26,797 INFO L78 Accepts]: Start accepts. Automaton has 112799 states and 271766 transitions. Word has length 39 [2021-06-05 20:34:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:26,797 INFO L482 AbstractCegarLoop]: Abstraction has 112799 states and 271766 transitions. [2021-06-05 20:34:26,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 112799 states and 271766 transitions. [2021-06-05 20:34:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:26,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:26,887 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:27,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable152 [2021-06-05 20:34:27,088 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash 955848063, now seen corresponding path program 141 times [2021-06-05 20:34:27,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:27,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10397737] [2021-06-05 20:34:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:27,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:27,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10397737] [2021-06-05 20:34:27,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10397737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:27,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865574383] [2021-06-05 20:34:27,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:27,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:34:27,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:27,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:27,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865574383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:27,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:27,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:27,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261752439] [2021-06-05 20:34:27,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:27,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:27,277 INFO L87 Difference]: Start difference. First operand 112799 states and 271766 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:29,088 INFO L93 Difference]: Finished difference Result 125558 states and 300392 transitions. [2021-06-05 20:34:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 20:34:29,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:29,293 INFO L225 Difference]: With dead ends: 125558 [2021-06-05 20:34:29,294 INFO L226 Difference]: Without dead ends: 125558 [2021-06-05 20:34:29,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 1194.9ms TimeCoverageRelationStatistics Valid=1832, Invalid=4330, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 20:34:29,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125558 states. [2021-06-05 20:34:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125558 to 114393. [2021-06-05 20:34:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114393 states, 114392 states have (on average 2.4086299741240644) internal successors, (275528), 114392 states have internal predecessors, (275528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114393 states to 114393 states and 275528 transitions. [2021-06-05 20:34:31,677 INFO L78 Accepts]: Start accepts. Automaton has 114393 states and 275528 transitions. Word has length 39 [2021-06-05 20:34:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:31,677 INFO L482 AbstractCegarLoop]: Abstraction has 114393 states and 275528 transitions. [2021-06-05 20:34:31,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 114393 states and 275528 transitions. [2021-06-05 20:34:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:31,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:31,766 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:31,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:31,966 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash -208493571, now seen corresponding path program 142 times [2021-06-05 20:34:31,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:31,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463016919] [2021-06-05 20:34:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:32,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:32,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463016919] [2021-06-05 20:34:32,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463016919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:32,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650294498] [2021-06-05 20:34:32,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:32,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:34:32,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:32,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650294498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:32,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:32,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:32,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434708064] [2021-06-05 20:34:32,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:32,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:32,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:32,156 INFO L87 Difference]: Start difference. First operand 114393 states and 275528 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:33,610 INFO L93 Difference]: Finished difference Result 144988 states and 349068 transitions. [2021-06-05 20:34:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 20:34:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:33,855 INFO L225 Difference]: With dead ends: 144988 [2021-06-05 20:34:33,855 INFO L226 Difference]: Without dead ends: 144946 [2021-06-05 20:34:33,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 20:34:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144946 states. [2021-06-05 20:34:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144946 to 118869. [2021-06-05 20:34:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118869 states, 118868 states have (on average 2.412676245919844) internal successors, (286790), 118868 states have internal predecessors, (286790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118869 states to 118869 states and 286790 transitions. [2021-06-05 20:34:36,397 INFO L78 Accepts]: Start accepts. Automaton has 118869 states and 286790 transitions. Word has length 39 [2021-06-05 20:34:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:36,397 INFO L482 AbstractCegarLoop]: Abstraction has 118869 states and 286790 transitions. [2021-06-05 20:34:36,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 118869 states and 286790 transitions. [2021-06-05 20:34:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:36,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:36,486 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:36,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:36,689 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:36,689 INFO L82 PathProgramCache]: Analyzing trace with hash 215764407, now seen corresponding path program 143 times [2021-06-05 20:34:36,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:36,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419495338] [2021-06-05 20:34:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:36,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:36,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419495338] [2021-06-05 20:34:36,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419495338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:36,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781319361] [2021-06-05 20:34:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:36,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 20:34:36,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:36,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:36,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:36,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781319361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:36,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:36,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:36,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299577494] [2021-06-05 20:34:36,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:36,926 INFO L87 Difference]: Start difference. First operand 118869 states and 286790 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:38,871 INFO L93 Difference]: Finished difference Result 133111 states and 319124 transitions. [2021-06-05 20:34:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 20:34:38,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:39,092 INFO L225 Difference]: With dead ends: 133111 [2021-06-05 20:34:39,092 INFO L226 Difference]: Without dead ends: 133111 [2021-06-05 20:34:39,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 902.5ms TimeCoverageRelationStatistics Valid=2081, Invalid=4725, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 20:34:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133111 states. [2021-06-05 20:34:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133111 to 120623. [2021-06-05 20:34:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120623 states, 120622 states have (on average 2.4136641740312714) internal successors, (291141), 120622 states have internal predecessors, (291141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120623 states to 120623 states and 291141 transitions. [2021-06-05 20:34:41,538 INFO L78 Accepts]: Start accepts. Automaton has 120623 states and 291141 transitions. Word has length 39 [2021-06-05 20:34:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:41,538 INFO L482 AbstractCegarLoop]: Abstraction has 120623 states and 291141 transitions. [2021-06-05 20:34:41,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 120623 states and 291141 transitions. [2021-06-05 20:34:41,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:41,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:41,627 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:41,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:41,827 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:41,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:41,827 INFO L82 PathProgramCache]: Analyzing trace with hash -390365191, now seen corresponding path program 144 times [2021-06-05 20:34:41,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:41,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455793712] [2021-06-05 20:34:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:41,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:41,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455793712] [2021-06-05 20:34:41,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455793712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:41,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252775909] [2021-06-05 20:34:41,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:41,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 20:34:41,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:41,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:42,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252775909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:42,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:42,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:42,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186539760] [2021-06-05 20:34:42,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:42,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:42,026 INFO L87 Difference]: Start difference. First operand 120623 states and 291141 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:43,488 INFO L93 Difference]: Finished difference Result 141591 states and 340988 transitions. [2021-06-05 20:34:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 20:34:43,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:43,724 INFO L225 Difference]: With dead ends: 141591 [2021-06-05 20:34:43,724 INFO L226 Difference]: Without dead ends: 141567 [2021-06-05 20:34:43,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 512.9ms TimeCoverageRelationStatistics Valid=876, Invalid=2906, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 20:34:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141567 states. [2021-06-05 20:34:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141567 to 123931. [2021-06-05 20:34:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123931 states, 123930 states have (on average 2.4170741547647867) internal successors, (299548), 123930 states have internal predecessors, (299548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123931 states to 123931 states and 299548 transitions. [2021-06-05 20:34:46,270 INFO L78 Accepts]: Start accepts. Automaton has 123931 states and 299548 transitions. Word has length 39 [2021-06-05 20:34:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:46,270 INFO L482 AbstractCegarLoop]: Abstraction has 123931 states and 299548 transitions. [2021-06-05 20:34:46,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 123931 states and 299548 transitions. [2021-06-05 20:34:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:46,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:46,357 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:46,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 20:34:46,558 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2028388479, now seen corresponding path program 145 times [2021-06-05 20:34:46,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:46,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61154721] [2021-06-05 20:34:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:46,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:46,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61154721] [2021-06-05 20:34:46,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61154721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:46,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698862176] [2021-06-05 20:34:46,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:46,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:46,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698862176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:46,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:46,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:46,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592499464] [2021-06-05 20:34:46,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:46,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:46,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:46,748 INFO L87 Difference]: Start difference. First operand 123931 states and 299548 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:48,601 INFO L93 Difference]: Finished difference Result 135737 states and 326532 transitions. [2021-06-05 20:34:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 20:34:48,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:48,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:48,828 INFO L225 Difference]: With dead ends: 135737 [2021-06-05 20:34:48,828 INFO L226 Difference]: Without dead ends: 135737 [2021-06-05 20:34:48,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 840.7ms TimeCoverageRelationStatistics Valid=2216, Invalid=4426, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 20:34:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135737 states. [2021-06-05 20:34:51,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135737 to 127158. [2021-06-05 20:34:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127158 states, 127157 states have (on average 2.420488058069945) internal successors, (307782), 127157 states have internal predecessors, (307782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127158 states to 127158 states and 307782 transitions. [2021-06-05 20:34:51,426 INFO L78 Accepts]: Start accepts. Automaton has 127158 states and 307782 transitions. Word has length 39 [2021-06-05 20:34:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:51,426 INFO L482 AbstractCegarLoop]: Abstraction has 127158 states and 307782 transitions. [2021-06-05 20:34:51,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 127158 states and 307782 transitions. [2021-06-05 20:34:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:51,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:51,515 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:51,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 20:34:51,718 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1333036413, now seen corresponding path program 146 times [2021-06-05 20:34:51,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:51,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994934520] [2021-06-05 20:34:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:51,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:51,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994934520] [2021-06-05 20:34:51,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994934520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:51,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587674101] [2021-06-05 20:34:51,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:51,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:34:51,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:51,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:51,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:51,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587674101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:51,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:51,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:51,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860690617] [2021-06-05 20:34:51,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:51,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:51,929 INFO L87 Difference]: Start difference. First operand 127158 states and 307782 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:53,483 INFO L93 Difference]: Finished difference Result 145519 states and 350802 transitions. [2021-06-05 20:34:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 20:34:53,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:53,710 INFO L225 Difference]: With dead ends: 145519 [2021-06-05 20:34:53,710 INFO L226 Difference]: Without dead ends: 145513 [2021-06-05 20:34:53,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 20:34:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145513 states. [2021-06-05 20:34:56,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145513 to 130997. [2021-06-05 20:34:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130997 states, 130996 states have (on average 2.4226541268435677) internal successors, (317358), 130996 states have internal predecessors, (317358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130997 states to 130997 states and 317358 transitions. [2021-06-05 20:34:56,471 INFO L78 Accepts]: Start accepts. Automaton has 130997 states and 317358 transitions. Word has length 39 [2021-06-05 20:34:56,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:34:56,471 INFO L482 AbstractCegarLoop]: Abstraction has 130997 states and 317358 transitions. [2021-06-05 20:34:56,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 130997 states and 317358 transitions. [2021-06-05 20:34:56,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:34:56,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:34:56,560 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:34:56,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 20:34:56,761 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:34:56,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:34:56,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1263053191, now seen corresponding path program 147 times [2021-06-05 20:34:56,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:34:56,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014788819] [2021-06-05 20:34:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:34:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:34:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:56,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:34:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014788819] [2021-06-05 20:34:56,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014788819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070999684] [2021-06-05 20:34:56,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:34:56,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:34:56,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:34:56,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:34:56,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:34:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:34:56,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070999684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:34:56,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:34:56,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:34:56,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872044498] [2021-06-05 20:34:56,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:34:56,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:34:56,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:34:56,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:34:56,962 INFO L87 Difference]: Start difference. First operand 130997 states and 317358 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:34:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:34:59,021 INFO L93 Difference]: Finished difference Result 145304 states and 347459 transitions. [2021-06-05 20:34:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 20:34:59,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:34:59,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:34:59,257 INFO L225 Difference]: With dead ends: 145304 [2021-06-05 20:34:59,257 INFO L226 Difference]: Without dead ends: 145280 [2021-06-05 20:34:59,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 1077.2ms TimeCoverageRelationStatistics Valid=2730, Invalid=7170, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 20:34:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145280 states. [2021-06-05 20:35:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145280 to 121707. [2021-06-05 20:35:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121707 states, 121706 states have (on average 2.4073997995168686) internal successors, (292995), 121706 states have internal predecessors, (292995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121707 states to 121707 states and 292995 transitions. [2021-06-05 20:35:02,539 INFO L78 Accepts]: Start accepts. Automaton has 121707 states and 292995 transitions. Word has length 39 [2021-06-05 20:35:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:02,539 INFO L482 AbstractCegarLoop]: Abstraction has 121707 states and 292995 transitions. [2021-06-05 20:35:02,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 121707 states and 292995 transitions. [2021-06-05 20:35:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:02,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:02,613 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:02,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 20:35:02,814 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:02,814 INFO L82 PathProgramCache]: Analyzing trace with hash -911326439, now seen corresponding path program 148 times [2021-06-05 20:35:02,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:02,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813874353] [2021-06-05 20:35:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:02,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:02,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813874353] [2021-06-05 20:35:02,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813874353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:02,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495295266] [2021-06-05 20:35:02,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:02,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:35:02,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:02,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:02,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495295266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:03,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:03,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 20:35:03,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684197275] [2021-06-05 20:35:03,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:35:03,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:35:03,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:35:03,009 INFO L87 Difference]: Start difference. First operand 121707 states and 292995 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:04,186 INFO L93 Difference]: Finished difference Result 126083 states and 302487 transitions. [2021-06-05 20:35:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 20:35:04,186 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:04,424 INFO L225 Difference]: With dead ends: 126083 [2021-06-05 20:35:04,424 INFO L226 Difference]: Without dead ends: 126077 [2021-06-05 20:35:04,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 577.3ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 20:35:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126077 states. [2021-06-05 20:35:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126077 to 110212. [2021-06-05 20:35:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110212 states, 110211 states have (on average 2.40307228861003) internal successors, (264845), 110211 states have internal predecessors, (264845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110212 states to 110212 states and 264845 transitions. [2021-06-05 20:35:07,034 INFO L78 Accepts]: Start accepts. Automaton has 110212 states and 264845 transitions. Word has length 39 [2021-06-05 20:35:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:07,034 INFO L482 AbstractCegarLoop]: Abstraction has 110212 states and 264845 transitions. [2021-06-05 20:35:07,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 110212 states and 264845 transitions. [2021-06-05 20:35:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:07,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:07,130 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:07,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:07,345 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:07,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1191682077, now seen corresponding path program 149 times [2021-06-05 20:35:07,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:07,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059595121] [2021-06-05 20:35:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:07,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:07,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059595121] [2021-06-05 20:35:07,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059595121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:07,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111489831] [2021-06-05 20:35:07,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:07,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 20:35:07,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:07,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:07,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111489831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:07,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:07,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 20:35:07,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912423136] [2021-06-05 20:35:07,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:35:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:35:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:35:07,767 INFO L87 Difference]: Start difference. First operand 110212 states and 264845 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:08,276 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 20:35:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:09,208 INFO L93 Difference]: Finished difference Result 118338 states and 283110 transitions. [2021-06-05 20:35:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 20:35:09,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:09,403 INFO L225 Difference]: With dead ends: 118338 [2021-06-05 20:35:09,404 INFO L226 Difference]: Without dead ends: 118292 [2021-06-05 20:35:09,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 959.6ms TimeCoverageRelationStatistics Valid=1019, Invalid=2287, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 20:35:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118292 states. [2021-06-05 20:35:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118292 to 110105. [2021-06-05 20:35:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110105 states, 110104 states have (on average 2.4034095037419165) internal successors, (264625), 110104 states have internal predecessors, (264625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110105 states to 110105 states and 264625 transitions. [2021-06-05 20:35:11,777 INFO L78 Accepts]: Start accepts. Automaton has 110105 states and 264625 transitions. Word has length 39 [2021-06-05 20:35:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:11,777 INFO L482 AbstractCegarLoop]: Abstraction has 110105 states and 264625 transitions. [2021-06-05 20:35:11,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 110105 states and 264625 transitions. [2021-06-05 20:35:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:11,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:11,867 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:12,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:12,068 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:12,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1596761379, now seen corresponding path program 150 times [2021-06-05 20:35:12,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:12,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786569259] [2021-06-05 20:35:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:12,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:12,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786569259] [2021-06-05 20:35:12,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786569259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:12,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302069165] [2021-06-05 20:35:12,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:12,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:35:12,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:12,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:12,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:12,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302069165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:12,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:12,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 20:35:12,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844408898] [2021-06-05 20:35:12,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:35:12,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:12,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:35:12,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:35:12,265 INFO L87 Difference]: Start difference. First operand 110105 states and 264625 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:13,882 INFO L93 Difference]: Finished difference Result 119880 states and 286661 transitions. [2021-06-05 20:35:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 20:35:13,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:14,080 INFO L225 Difference]: With dead ends: 119880 [2021-06-05 20:35:14,080 INFO L226 Difference]: Without dead ends: 119852 [2021-06-05 20:35:14,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=1081, Invalid=2579, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:35:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119852 states. [2021-06-05 20:35:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119852 to 110231. [2021-06-05 20:35:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110231 states, 110230 states have (on average 2.403492697087907) internal successors, (264937), 110230 states have internal predecessors, (264937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110231 states to 110231 states and 264937 transitions. [2021-06-05 20:35:16,022 INFO L78 Accepts]: Start accepts. Automaton has 110231 states and 264937 transitions. Word has length 39 [2021-06-05 20:35:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:16,023 INFO L482 AbstractCegarLoop]: Abstraction has 110231 states and 264937 transitions. [2021-06-05 20:35:16,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 110231 states and 264937 transitions. [2021-06-05 20:35:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:16,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:16,480 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:16,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:16,699 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:16,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:16,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1197447197, now seen corresponding path program 151 times [2021-06-05 20:35:16,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:16,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525685683] [2021-06-05 20:35:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:16,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:16,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525685683] [2021-06-05 20:35:16,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525685683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:16,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409228198] [2021-06-05 20:35:16,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:16,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:16,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:16,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409228198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:16,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:16,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 20:35:16,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791790295] [2021-06-05 20:35:16,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:35:16,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:16,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:35:16,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:35:16,928 INFO L87 Difference]: Start difference. First operand 110231 states and 264937 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:18,317 INFO L93 Difference]: Finished difference Result 123190 states and 294175 transitions. [2021-06-05 20:35:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 20:35:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:18,531 INFO L225 Difference]: With dead ends: 123190 [2021-06-05 20:35:18,531 INFO L226 Difference]: Without dead ends: 123168 [2021-06-05 20:35:18,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=1736, Invalid=4116, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 20:35:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123168 states. [2021-06-05 20:35:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123168 to 111255. [2021-06-05 20:35:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111255 states, 111254 states have (on average 2.4027540582810505) internal successors, (267316), 111254 states have internal predecessors, (267316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111255 states to 111255 states and 267316 transitions. [2021-06-05 20:35:20,970 INFO L78 Accepts]: Start accepts. Automaton has 111255 states and 267316 transitions. Word has length 39 [2021-06-05 20:35:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:20,971 INFO L482 AbstractCegarLoop]: Abstraction has 111255 states and 267316 transitions. [2021-06-05 20:35:20,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 111255 states and 267316 transitions. [2021-06-05 20:35:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:21,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:21,058 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:21,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:21,258 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:21,259 INFO L82 PathProgramCache]: Analyzing trace with hash -398564643, now seen corresponding path program 152 times [2021-06-05 20:35:21,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:21,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339683111] [2021-06-05 20:35:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:21,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339683111] [2021-06-05 20:35:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339683111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407614663] [2021-06-05 20:35:21,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:21,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:21,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:21,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:21,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:21,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407614663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:21,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:21,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 20:35:21,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136416423] [2021-06-05 20:35:21,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:35:21,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:21,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:35:21,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:35:21,468 INFO L87 Difference]: Start difference. First operand 111255 states and 267316 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:23,315 INFO L93 Difference]: Finished difference Result 129549 states and 308909 transitions. [2021-06-05 20:35:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 20:35:23,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:23,518 INFO L225 Difference]: With dead ends: 129549 [2021-06-05 20:35:23,518 INFO L226 Difference]: Without dead ends: 129545 [2021-06-05 20:35:23,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 888.7ms TimeCoverageRelationStatistics Valid=2026, Invalid=4454, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 20:35:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129545 states. [2021-06-05 20:35:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129545 to 112829. [2021-06-05 20:35:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112829 states, 112828 states have (on average 2.4014074520509094) internal successors, (270946), 112828 states have internal predecessors, (270946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112829 states to 112829 states and 270946 transitions. [2021-06-05 20:35:25,950 INFO L78 Accepts]: Start accepts. Automaton has 112829 states and 270946 transitions. Word has length 39 [2021-06-05 20:35:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:25,950 INFO L482 AbstractCegarLoop]: Abstraction has 112829 states and 270946 transitions. [2021-06-05 20:35:25,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 112829 states and 270946 transitions. [2021-06-05 20:35:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:26,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:26,036 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:26,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:26,236 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:26,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:26,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2028892131, now seen corresponding path program 153 times [2021-06-05 20:35:26,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:26,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39736161] [2021-06-05 20:35:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:26,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:26,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39736161] [2021-06-05 20:35:26,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39736161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:26,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995193435] [2021-06-05 20:35:26,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:26,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 20:35:26,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:26,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:26,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995193435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:26,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:26,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 20:35:26,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055080134] [2021-06-05 20:35:26,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:35:26,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:26,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:35:26,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:35:26,445 INFO L87 Difference]: Start difference. First operand 112829 states and 270946 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:28,249 INFO L93 Difference]: Finished difference Result 129954 states and 310535 transitions. [2021-06-05 20:35:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 20:35:28,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:28,458 INFO L225 Difference]: With dead ends: 129954 [2021-06-05 20:35:28,458 INFO L226 Difference]: Without dead ends: 129954 [2021-06-05 20:35:28,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 1172.0ms TimeCoverageRelationStatistics Valid=2125, Invalid=4355, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 20:35:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129954 states. [2021-06-05 20:35:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129954 to 117772. [2021-06-05 20:35:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117772 states, 117771 states have (on average 2.4055412622801877) internal successors, (283303), 117771 states have internal predecessors, (283303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117772 states to 117772 states and 283303 transitions. [2021-06-05 20:35:30,968 INFO L78 Accepts]: Start accepts. Automaton has 117772 states and 283303 transitions. Word has length 39 [2021-06-05 20:35:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:30,968 INFO L482 AbstractCegarLoop]: Abstraction has 117772 states and 283303 transitions. [2021-06-05 20:35:30,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 117772 states and 283303 transitions. [2021-06-05 20:35:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:31,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:31,048 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:31,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:31,248 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:31,249 INFO L82 PathProgramCache]: Analyzing trace with hash -673639753, now seen corresponding path program 154 times [2021-06-05 20:35:31,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:31,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670235188] [2021-06-05 20:35:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:35:31,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:31,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670235188] [2021-06-05 20:35:31,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670235188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:31,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325079989] [2021-06-05 20:35:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:31,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:35:31,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:31,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:31,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325079989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:31,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:31,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 20:35:31,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432809972] [2021-06-05 20:35:31,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:35:31,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:31,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:35:31,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:35:31,467 INFO L87 Difference]: Start difference. First operand 117772 states and 283303 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:33,103 INFO L93 Difference]: Finished difference Result 125213 states and 299816 transitions. [2021-06-05 20:35:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 20:35:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:33,303 INFO L225 Difference]: With dead ends: 125213 [2021-06-05 20:35:33,303 INFO L226 Difference]: Without dead ends: 125201 [2021-06-05 20:35:33,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 656.2ms TimeCoverageRelationStatistics Valid=1543, Invalid=3149, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:35:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125201 states. [2021-06-05 20:35:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125201 to 105964. [2021-06-05 20:35:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105964 states, 105963 states have (on average 2.396638449270028) internal successors, (253955), 105963 states have internal predecessors, (253955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105964 states to 105964 states and 253955 transitions. [2021-06-05 20:35:35,690 INFO L78 Accepts]: Start accepts. Automaton has 105964 states and 253955 transitions. Word has length 39 [2021-06-05 20:35:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:35,690 INFO L482 AbstractCegarLoop]: Abstraction has 105964 states and 253955 transitions. [2021-06-05 20:35:35,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 105964 states and 253955 transitions. [2021-06-05 20:35:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:35,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:35,762 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:35,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 20:35:35,962 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1179986019, now seen corresponding path program 155 times [2021-06-05 20:35:35,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:35,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789136892] [2021-06-05 20:35:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:36,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789136892] [2021-06-05 20:35:36,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789136892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319099070] [2021-06-05 20:35:36,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:36,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 20:35:36,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:36,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:36,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319099070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:36,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:36,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 20:35:36,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993635361] [2021-06-05 20:35:36,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:35:36,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:36,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:35:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:35:36,182 INFO L87 Difference]: Start difference. First operand 105964 states and 253955 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:37,330 INFO L93 Difference]: Finished difference Result 114441 states and 273070 transitions. [2021-06-05 20:35:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 20:35:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:37,553 INFO L225 Difference]: With dead ends: 114441 [2021-06-05 20:35:37,553 INFO L226 Difference]: Without dead ends: 114417 [2021-06-05 20:35:37,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 20:35:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114417 states. [2021-06-05 20:35:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114417 to 103265. [2021-06-05 20:35:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103265 states, 103264 states have (on average 2.4000232414006817) internal successors, (247836), 103264 states have internal predecessors, (247836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103265 states to 103265 states and 247836 transitions. [2021-06-05 20:35:39,844 INFO L78 Accepts]: Start accepts. Automaton has 103265 states and 247836 transitions. Word has length 39 [2021-06-05 20:35:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:39,844 INFO L482 AbstractCegarLoop]: Abstraction has 103265 states and 247836 transitions. [2021-06-05 20:35:39,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 103265 states and 247836 transitions. [2021-06-05 20:35:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:39,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:39,924 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:40,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 20:35:40,125 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1957120325, now seen corresponding path program 156 times [2021-06-05 20:35:40,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:40,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565467628] [2021-06-05 20:35:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:40,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:40,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565467628] [2021-06-05 20:35:40,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565467628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:40,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146145619] [2021-06-05 20:35:40,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:40,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:35:40,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:40,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:40,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146145619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:40,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:40,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 20:35:40,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296295919] [2021-06-05 20:35:40,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:35:40,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:40,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:35:40,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:35:40,366 INFO L87 Difference]: Start difference. First operand 103265 states and 247836 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:42,146 INFO L93 Difference]: Finished difference Result 111006 states and 265026 transitions. [2021-06-05 20:35:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 20:35:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:42,369 INFO L225 Difference]: With dead ends: 111006 [2021-06-05 20:35:42,369 INFO L226 Difference]: Without dead ends: 110960 [2021-06-05 20:35:42,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 659.7ms TimeCoverageRelationStatistics Valid=1149, Invalid=2757, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 20:35:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110960 states. [2021-06-05 20:35:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110960 to 102814. [2021-06-05 20:35:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102814 states, 102813 states have (on average 2.3998910643595655) internal successors, (246740), 102813 states have internal predecessors, (246740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102814 states to 102814 states and 246740 transitions. [2021-06-05 20:35:44,351 INFO L78 Accepts]: Start accepts. Automaton has 102814 states and 246740 transitions. Word has length 39 [2021-06-05 20:35:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:44,351 INFO L482 AbstractCegarLoop]: Abstraction has 102814 states and 246740 transitions. [2021-06-05 20:35:44,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 102814 states and 246740 transitions. [2021-06-05 20:35:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:44,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:44,432 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:44,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 20:35:44,637 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:44,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1123204297, now seen corresponding path program 157 times [2021-06-05 20:35:44,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:44,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790292143] [2021-06-05 20:35:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:44,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:44,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790292143] [2021-06-05 20:35:44,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790292143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:44,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111509040] [2021-06-05 20:35:44,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:44,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:44,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111509040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:44,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:44,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 20:35:44,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117951587] [2021-06-05 20:35:44,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:35:44,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:44,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:35:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:35:44,848 INFO L87 Difference]: Start difference. First operand 102814 states and 246740 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:45,526 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2021-06-05 20:35:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:46,405 INFO L93 Difference]: Finished difference Result 111478 states and 266031 transitions. [2021-06-05 20:35:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 20:35:46,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:46,599 INFO L225 Difference]: With dead ends: 111478 [2021-06-05 20:35:46,599 INFO L226 Difference]: Without dead ends: 111450 [2021-06-05 20:35:46,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1061.2ms TimeCoverageRelationStatistics Valid=1203, Invalid=2957, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 20:35:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111450 states. [2021-06-05 20:35:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111450 to 102255. [2021-06-05 20:35:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102255 states, 102254 states have (on average 2.399436696852935) internal successors, (245352), 102254 states have internal predecessors, (245352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102255 states to 102255 states and 245352 transitions. [2021-06-05 20:35:48,915 INFO L78 Accepts]: Start accepts. Automaton has 102255 states and 245352 transitions. Word has length 39 [2021-06-05 20:35:48,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:48,915 INFO L482 AbstractCegarLoop]: Abstraction has 102255 states and 245352 transitions. [2021-06-05 20:35:48,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 102255 states and 245352 transitions. [2021-06-05 20:35:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:48,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:48,994 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:49,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 20:35:49,197 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash 801925179, now seen corresponding path program 158 times [2021-06-05 20:35:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:49,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942702998] [2021-06-05 20:35:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:49,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:49,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942702998] [2021-06-05 20:35:49,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942702998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:49,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183812209] [2021-06-05 20:35:49,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:49,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:35:49,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:49,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:49,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:49,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183812209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:49,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:49,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 20:35:49,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414156765] [2021-06-05 20:35:49,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:35:49,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:49,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:35:49,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:35:49,402 INFO L87 Difference]: Start difference. First operand 102255 states and 245352 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:50,713 INFO L93 Difference]: Finished difference Result 118612 states and 283042 transitions. [2021-06-05 20:35:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 20:35:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:50,899 INFO L225 Difference]: With dead ends: 118612 [2021-06-05 20:35:50,899 INFO L226 Difference]: Without dead ends: 118602 [2021-06-05 20:35:50,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=1437, Invalid=3255, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:35:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118602 states. [2021-06-05 20:35:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118602 to 104395. [2021-06-05 20:35:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104395 states, 104394 states have (on average 2.3985861256394045) internal successors, (250398), 104394 states have internal predecessors, (250398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104395 states to 104395 states and 250398 transitions. [2021-06-05 20:35:53,079 INFO L78 Accepts]: Start accepts. Automaton has 104395 states and 250398 transitions. Word has length 39 [2021-06-05 20:35:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:53,079 INFO L482 AbstractCegarLoop]: Abstraction has 104395 states and 250398 transitions. [2021-06-05 20:35:53,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 104395 states and 250398 transitions. [2021-06-05 20:35:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:53,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:53,160 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:53,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:53,361 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:53,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1257045577, now seen corresponding path program 159 times [2021-06-05 20:35:53,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:53,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698392248] [2021-06-05 20:35:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:53,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:53,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698392248] [2021-06-05 20:35:53,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698392248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:53,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212196611] [2021-06-05 20:35:53,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:53,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 20:35:53,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:53,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:53,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212196611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:53,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:53,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 20:35:53,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508523666] [2021-06-05 20:35:53,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:35:53,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:53,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:35:53,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:35:53,548 INFO L87 Difference]: Start difference. First operand 104395 states and 250398 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:55,327 INFO L93 Difference]: Finished difference Result 130807 states and 311012 transitions. [2021-06-05 20:35:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 20:35:55,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:35:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:55,537 INFO L225 Difference]: With dead ends: 130807 [2021-06-05 20:35:55,537 INFO L226 Difference]: Without dead ends: 130803 [2021-06-05 20:35:55,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 1172.2ms TimeCoverageRelationStatistics Valid=2051, Invalid=4429, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 20:35:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130803 states. [2021-06-05 20:35:57,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130803 to 107997. [2021-06-05 20:35:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107997 states, 107996 states have (on average 2.396773954590911) internal successors, (258842), 107996 states have internal predecessors, (258842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107997 states to 107997 states and 258842 transitions. [2021-06-05 20:35:57,874 INFO L78 Accepts]: Start accepts. Automaton has 107997 states and 258842 transitions. Word has length 39 [2021-06-05 20:35:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:57,874 INFO L482 AbstractCegarLoop]: Abstraction has 107997 states and 258842 transitions. [2021-06-05 20:35:57,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 107997 states and 258842 transitions. [2021-06-05 20:35:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:35:57,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:57,952 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:58,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 20:35:58,152 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:58,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1531132347, now seen corresponding path program 160 times [2021-06-05 20:35:58,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:58,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216004262] [2021-06-05 20:35:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:58,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:58,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216004262] [2021-06-05 20:35:58,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216004262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:58,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929643589] [2021-06-05 20:35:58,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:35:58,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:35:58,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:35:58,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:35:58,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:35:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:58,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929643589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:35:58,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:35:58,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 20:35:58,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810474590] [2021-06-05 20:35:58,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:35:58,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:58,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:35:58,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:35:58,344 INFO L87 Difference]: Start difference. First operand 107997 states and 258842 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:59,794 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 20:36:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:00,240 INFO L93 Difference]: Finished difference Result 130637 states and 311079 transitions. [2021-06-05 20:36:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 20:36:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:00,445 INFO L225 Difference]: With dead ends: 130637 [2021-06-05 20:36:00,445 INFO L226 Difference]: Without dead ends: 130637 [2021-06-05 20:36:00,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 1283.6ms TimeCoverageRelationStatistics Valid=2600, Invalid=5410, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 20:36:00,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130637 states. [2021-06-05 20:36:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130637 to 114550. [2021-06-05 20:36:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114550 states, 114549 states have (on average 2.400309038053584) internal successors, (274953), 114549 states have internal predecessors, (274953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114550 states to 114550 states and 274953 transitions. [2021-06-05 20:36:02,900 INFO L78 Accepts]: Start accepts. Automaton has 114550 states and 274953 transitions. Word has length 39 [2021-06-05 20:36:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:02,900 INFO L482 AbstractCegarLoop]: Abstraction has 114550 states and 274953 transitions. [2021-06-05 20:36:02,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 114550 states and 274953 transitions. [2021-06-05 20:36:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:02,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:02,979 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:03,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:03,180 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:03,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1408582571, now seen corresponding path program 161 times [2021-06-05 20:36:03,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:03,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644679045] [2021-06-05 20:36:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:36:03,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:03,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644679045] [2021-06-05 20:36:03,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644679045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:03,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510616186] [2021-06-05 20:36:03,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:03,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 20:36:03,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:03,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:03,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510616186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:03,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:03,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 20:36:03,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606568979] [2021-06-05 20:36:03,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:36:03,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:36:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:36:03,372 INFO L87 Difference]: Start difference. First operand 114550 states and 274953 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:05,022 INFO L93 Difference]: Finished difference Result 126139 states and 300978 transitions. [2021-06-05 20:36:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 20:36:05,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:05,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:05,223 INFO L225 Difference]: With dead ends: 126139 [2021-06-05 20:36:05,223 INFO L226 Difference]: Without dead ends: 126127 [2021-06-05 20:36:05,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=1756, Invalid=3794, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 20:36:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126127 states. [2021-06-05 20:36:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126127 to 106841. [2021-06-05 20:36:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106841 states, 106840 states have (on average 2.3954792212654437) internal successors, (255933), 106840 states have internal predecessors, (255933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106841 states to 106841 states and 255933 transitions. [2021-06-05 20:36:07,630 INFO L78 Accepts]: Start accepts. Automaton has 106841 states and 255933 transitions. Word has length 39 [2021-06-05 20:36:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:07,631 INFO L482 AbstractCegarLoop]: Abstraction has 106841 states and 255933 transitions. [2021-06-05 20:36:07,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 106841 states and 255933 transitions. [2021-06-05 20:36:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:07,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:07,700 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:07,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:07,901 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:07,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:07,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1914928837, now seen corresponding path program 162 times [2021-06-05 20:36:07,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:07,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730899534] [2021-06-05 20:36:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:36:07,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:07,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730899534] [2021-06-05 20:36:07,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730899534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:07,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31753819] [2021-06-05 20:36:07,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:07,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 20:36:07,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:07,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:08,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31753819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:08,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:08,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 20:36:08,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077483520] [2021-06-05 20:36:08,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:36:08,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:36:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:36:08,118 INFO L87 Difference]: Start difference. First operand 106841 states and 255933 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:09,289 INFO L93 Difference]: Finished difference Result 120304 states and 286480 transitions. [2021-06-05 20:36:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 20:36:09,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:09,481 INFO L225 Difference]: With dead ends: 120304 [2021-06-05 20:36:09,481 INFO L226 Difference]: Without dead ends: 120268 [2021-06-05 20:36:09,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 679.2ms TimeCoverageRelationStatistics Valid=1564, Invalid=3548, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 20:36:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120268 states. [2021-06-05 20:36:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120268 to 103110. [2021-06-05 20:36:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103110 states, 103109 states have (on average 2.3949703711606163) internal successors, (246943), 103109 states have internal predecessors, (246943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103110 states to 103110 states and 246943 transitions. [2021-06-05 20:36:11,729 INFO L78 Accepts]: Start accepts. Automaton has 103110 states and 246943 transitions. Word has length 39 [2021-06-05 20:36:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:11,729 INFO L482 AbstractCegarLoop]: Abstraction has 103110 states and 246943 transitions. [2021-06-05 20:36:11,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 103110 states and 246943 transitions. [2021-06-05 20:36:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:11,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:11,802 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:12,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:12,003 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:12,003 INFO L82 PathProgramCache]: Analyzing trace with hash -173592679, now seen corresponding path program 163 times [2021-06-05 20:36:12,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:12,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991341592] [2021-06-05 20:36:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:12,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991341592] [2021-06-05 20:36:12,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991341592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550009317] [2021-06-05 20:36:12,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:12,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:12,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550009317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:12,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:12,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 20:36:12,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682374245] [2021-06-05 20:36:12,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:36:12,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:12,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:36:12,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:36:12,235 INFO L87 Difference]: Start difference. First operand 103110 states and 246943 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:12,972 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 20:36:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:13,632 INFO L93 Difference]: Finished difference Result 116965 states and 278352 transitions. [2021-06-05 20:36:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 20:36:13,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:13,812 INFO L225 Difference]: With dead ends: 116965 [2021-06-05 20:36:13,812 INFO L226 Difference]: Without dead ends: 116923 [2021-06-05 20:36:13,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 923.0ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:36:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116923 states. [2021-06-05 20:36:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116923 to 101284. [2021-06-05 20:36:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101284 states, 101283 states have (on average 2.4000473919611385) internal successors, (243084), 101283 states have internal predecessors, (243084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101284 states to 101284 states and 243084 transitions. [2021-06-05 20:36:16,059 INFO L78 Accepts]: Start accepts. Automaton has 101284 states and 243084 transitions. Word has length 39 [2021-06-05 20:36:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:16,059 INFO L482 AbstractCegarLoop]: Abstraction has 101284 states and 243084 transitions. [2021-06-05 20:36:16,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 101284 states and 243084 transitions. [2021-06-05 20:36:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:16,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:16,133 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:16,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:16,341 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1548766371, now seen corresponding path program 164 times [2021-06-05 20:36:16,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:16,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283640944] [2021-06-05 20:36:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:16,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:16,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283640944] [2021-06-05 20:36:16,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283640944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:16,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877501249] [2021-06-05 20:36:16,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:16,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:16,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:16,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877501249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:16,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:16,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 20:36:16,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137074455] [2021-06-05 20:36:16,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:36:16,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:16,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:36:16,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:36:16,580 INFO L87 Difference]: Start difference. First operand 101284 states and 243084 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:17,683 INFO L93 Difference]: Finished difference Result 106045 states and 253332 transitions. [2021-06-05 20:36:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 20:36:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:17,856 INFO L225 Difference]: With dead ends: 106045 [2021-06-05 20:36:17,857 INFO L226 Difference]: Without dead ends: 105999 [2021-06-05 20:36:17,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=1198, Invalid=3092, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 20:36:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105999 states. [2021-06-05 20:36:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105999 to 100686. [2021-06-05 20:36:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100686 states, 100685 states have (on average 2.399513333664399) internal successors, (241595), 100685 states have internal predecessors, (241595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100686 states to 100686 states and 241595 transitions. [2021-06-05 20:36:19,986 INFO L78 Accepts]: Start accepts. Automaton has 100686 states and 241595 transitions. Word has length 39 [2021-06-05 20:36:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:19,986 INFO L482 AbstractCegarLoop]: Abstraction has 100686 states and 241595 transitions. [2021-06-05 20:36:19,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 100686 states and 241595 transitions. [2021-06-05 20:36:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:20,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:20,062 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:20,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 20:36:20,262 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1943225501, now seen corresponding path program 165 times [2021-06-05 20:36:20,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:20,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048101131] [2021-06-05 20:36:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:20,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:20,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048101131] [2021-06-05 20:36:20,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048101131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:20,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869039399] [2021-06-05 20:36:20,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:20,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:36:20,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:20,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:20,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869039399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:20,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:20,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 20:36:20,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88191525] [2021-06-05 20:36:20,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:36:20,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:20,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:36:20,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:36:20,499 INFO L87 Difference]: Start difference. First operand 100686 states and 241595 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:22,040 INFO L93 Difference]: Finished difference Result 108606 states and 258910 transitions. [2021-06-05 20:36:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 20:36:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:22,211 INFO L225 Difference]: With dead ends: 108606 [2021-06-05 20:36:22,212 INFO L226 Difference]: Without dead ends: 108578 [2021-06-05 20:36:22,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 685.9ms TimeCoverageRelationStatistics Valid=1239, Invalid=3183, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 20:36:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108578 states. [2021-06-05 20:36:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108578 to 97895. [2021-06-05 20:36:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97895 states, 97894 states have (on average 2.399912149876397) internal successors, (234937), 97894 states have internal predecessors, (234937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97895 states to 97895 states and 234937 transitions. [2021-06-05 20:36:24,418 INFO L78 Accepts]: Start accepts. Automaton has 97895 states and 234937 transitions. Word has length 39 [2021-06-05 20:36:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:24,418 INFO L482 AbstractCegarLoop]: Abstraction has 97895 states and 234937 transitions. [2021-06-05 20:36:24,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 97895 states and 234937 transitions. [2021-06-05 20:36:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:24,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:24,490 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:24,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 20:36:24,690 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1099220131, now seen corresponding path program 166 times [2021-06-05 20:36:24,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:24,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50912336] [2021-06-05 20:36:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:24,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:24,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50912336] [2021-06-05 20:36:24,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50912336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:24,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55891829] [2021-06-05 20:36:24,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:24,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:36:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:24,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55891829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:24,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:24,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 20:36:24,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868784321] [2021-06-05 20:36:24,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:36:24,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:36:24,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:36:24,892 INFO L87 Difference]: Start difference. First operand 97895 states and 234937 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:26,170 INFO L93 Difference]: Finished difference Result 118191 states and 282001 transitions. [2021-06-05 20:36:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 20:36:26,170 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:26,357 INFO L225 Difference]: With dead ends: 118191 [2021-06-05 20:36:26,357 INFO L226 Difference]: Without dead ends: 118181 [2021-06-05 20:36:26,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 719.6ms TimeCoverageRelationStatistics Valid=1576, Invalid=3680, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 20:36:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118181 states. [2021-06-05 20:36:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118181 to 97214. [2021-06-05 20:36:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97214 states, 97213 states have (on average 2.399154434077747) internal successors, (233229), 97213 states have internal predecessors, (233229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97214 states to 97214 states and 233229 transitions. [2021-06-05 20:36:28,435 INFO L78 Accepts]: Start accepts. Automaton has 97214 states and 233229 transitions. Word has length 39 [2021-06-05 20:36:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:28,435 INFO L482 AbstractCegarLoop]: Abstraction has 97214 states and 233229 transitions. [2021-06-05 20:36:28,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 97214 states and 233229 transitions. [2021-06-05 20:36:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:28,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:28,509 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:28,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 20:36:28,710 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:28,710 INFO L82 PathProgramCache]: Analyzing trace with hash 267697309, now seen corresponding path program 167 times [2021-06-05 20:36:28,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:28,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433484330] [2021-06-05 20:36:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:28,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:28,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433484330] [2021-06-05 20:36:28,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433484330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:28,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456743483] [2021-06-05 20:36:28,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:28,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 20:36:28,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:28,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:28,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:28,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456743483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:28,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:28,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 20:36:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222148187] [2021-06-05 20:36:28,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:36:28,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:36:28,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:36:28,911 INFO L87 Difference]: Start difference. First operand 97214 states and 233229 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:30,698 INFO L93 Difference]: Finished difference Result 130871 states and 312262 transitions. [2021-06-05 20:36:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 20:36:30,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:30,900 INFO L225 Difference]: With dead ends: 130871 [2021-06-05 20:36:30,900 INFO L226 Difference]: Without dead ends: 130869 [2021-06-05 20:36:30,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 1188.4ms TimeCoverageRelationStatistics Valid=2298, Invalid=4842, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 20:36:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130869 states. [2021-06-05 20:36:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130869 to 104295. [2021-06-05 20:36:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104295 states, 104294 states have (on average 2.3980478263370855) internal successors, (250102), 104294 states have internal predecessors, (250102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104295 states to 104295 states and 250102 transitions. [2021-06-05 20:36:33,207 INFO L78 Accepts]: Start accepts. Automaton has 104295 states and 250102 transitions. Word has length 39 [2021-06-05 20:36:33,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:33,207 INFO L482 AbstractCegarLoop]: Abstraction has 104295 states and 250102 transitions. [2021-06-05 20:36:33,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand 104295 states and 250102 transitions. [2021-06-05 20:36:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:33,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:33,278 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:33,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:33,479 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:33,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1702050979, now seen corresponding path program 168 times [2021-06-05 20:36:33,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:33,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178858283] [2021-06-05 20:36:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:33,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:33,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178858283] [2021-06-05 20:36:33,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178858283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:33,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414094065] [2021-06-05 20:36:33,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:33,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 20:36:33,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:33,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414094065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:33,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:33,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 20:36:33,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007782741] [2021-06-05 20:36:33,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:36:33,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:33,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:36:33,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:36:33,700 INFO L87 Difference]: Start difference. First operand 104295 states and 250102 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:35,317 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 20:36:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:35,748 INFO L93 Difference]: Finished difference Result 133586 states and 317358 transitions. [2021-06-05 20:36:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 20:36:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:35,956 INFO L225 Difference]: With dead ends: 133586 [2021-06-05 20:36:35,956 INFO L226 Difference]: Without dead ends: 133586 [2021-06-05 20:36:35,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4012 ImplicationChecksByTransitivity, 1480.4ms TimeCoverageRelationStatistics Valid=3456, Invalid=7464, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 20:36:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133586 states. [2021-06-05 20:36:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133586 to 113429. [2021-06-05 20:36:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113429 states, 113428 states have (on average 2.3985523856543356) internal successors, (272063), 113428 states have internal predecessors, (272063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113429 states to 113429 states and 272063 transitions. [2021-06-05 20:36:38,670 INFO L78 Accepts]: Start accepts. Automaton has 113429 states and 272063 transitions. Word has length 39 [2021-06-05 20:36:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:38,671 INFO L482 AbstractCegarLoop]: Abstraction has 113429 states and 272063 transitions. [2021-06-05 20:36:38,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 113429 states and 272063 transitions. [2021-06-05 20:36:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:38,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:38,746 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:38,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:38,947 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:38,947 INFO L82 PathProgramCache]: Analyzing trace with hash -346798601, now seen corresponding path program 169 times [2021-06-05 20:36:38,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:38,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260940148] [2021-06-05 20:36:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:36:39,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:39,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260940148] [2021-06-05 20:36:39,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260940148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:39,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470978814] [2021-06-05 20:36:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:39,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:39,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:39,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470978814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:39,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:39,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 20:36:39,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061785321] [2021-06-05 20:36:39,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:36:39,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:39,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:36:39,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:36:39,168 INFO L87 Difference]: Start difference. First operand 113429 states and 272063 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:40,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:40,926 INFO L93 Difference]: Finished difference Result 130345 states and 310147 transitions. [2021-06-05 20:36:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 20:36:40,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:40,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:41,129 INFO L225 Difference]: With dead ends: 130345 [2021-06-05 20:36:41,129 INFO L226 Difference]: Without dead ends: 130336 [2021-06-05 20:36:41,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 846.1ms TimeCoverageRelationStatistics Valid=2122, Invalid=4850, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 20:36:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130336 states. [2021-06-05 20:36:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130336 to 109819. [2021-06-05 20:36:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109819 states, 109818 states have (on average 2.395235753701579) internal successors, (263040), 109818 states have internal predecessors, (263040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109819 states to 109819 states and 263040 transitions. [2021-06-05 20:36:43,512 INFO L78 Accepts]: Start accepts. Automaton has 109819 states and 263040 transitions. Word has length 39 [2021-06-05 20:36:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:43,513 INFO L482 AbstractCegarLoop]: Abstraction has 109819 states and 263040 transitions. [2021-06-05 20:36:43,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 109819 states and 263040 transitions. [2021-06-05 20:36:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:43,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:43,587 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:43,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:43,788 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:43,788 INFO L82 PathProgramCache]: Analyzing trace with hash -853144867, now seen corresponding path program 170 times [2021-06-05 20:36:43,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:43,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105650907] [2021-06-05 20:36:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:36:43,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105650907] [2021-06-05 20:36:43,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105650907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458590787] [2021-06-05 20:36:43,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:43,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:36:43,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:43,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:44,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458590787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:44,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:44,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 20:36:44,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579576484] [2021-06-05 20:36:44,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:36:44,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:44,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:36:44,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:36:44,028 INFO L87 Difference]: Start difference. First operand 109819 states and 263040 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:46,181 INFO L93 Difference]: Finished difference Result 129212 states and 307091 transitions. [2021-06-05 20:36:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 20:36:46,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:46,382 INFO L225 Difference]: With dead ends: 129212 [2021-06-05 20:36:46,382 INFO L226 Difference]: Without dead ends: 129176 [2021-06-05 20:36:46,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 883.1ms TimeCoverageRelationStatistics Valid=1815, Invalid=4347, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 20:36:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129176 states. [2021-06-05 20:36:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129176 to 109273. [2021-06-05 20:36:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109273 states, 109272 states have (on average 2.394483490738707) internal successors, (261650), 109272 states have internal predecessors, (261650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109273 states to 109273 states and 261650 transitions. [2021-06-05 20:36:48,816 INFO L78 Accepts]: Start accepts. Automaton has 109273 states and 261650 transitions. Word has length 39 [2021-06-05 20:36:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:48,816 INFO L482 AbstractCegarLoop]: Abstraction has 109273 states and 261650 transitions. [2021-06-05 20:36:48,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 109273 states and 261650 transitions. [2021-06-05 20:36:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:48,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:48,880 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:49,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 20:36:49,080 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:49,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash 888191291, now seen corresponding path program 171 times [2021-06-05 20:36:49,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:49,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033633075] [2021-06-05 20:36:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:36:49,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:49,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033633075] [2021-06-05 20:36:49,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033633075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:49,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675143848] [2021-06-05 20:36:49,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:49,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 20:36:49,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:49,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:49,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675143848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:49,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:49,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 20:36:49,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937318756] [2021-06-05 20:36:49,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:36:49,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:36:49,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:36:49,330 INFO L87 Difference]: Start difference. First operand 109273 states and 261650 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:50,493 INFO L93 Difference]: Finished difference Result 130958 states and 311089 transitions. [2021-06-05 20:36:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 20:36:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:50,705 INFO L225 Difference]: With dead ends: 130958 [2021-06-05 20:36:50,706 INFO L226 Difference]: Without dead ends: 130907 [2021-06-05 20:36:50,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 706.3ms TimeCoverageRelationStatistics Valid=1542, Invalid=3860, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 20:36:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130907 states. [2021-06-05 20:36:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130907 to 110025. [2021-06-05 20:36:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110025 states, 110024 states have (on average 2.396349887297317) internal successors, (263656), 110024 states have internal predecessors, (263656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110025 states to 110025 states and 263656 transitions. [2021-06-05 20:36:53,076 INFO L78 Accepts]: Start accepts. Automaton has 110025 states and 263656 transitions. Word has length 39 [2021-06-05 20:36:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:53,076 INFO L482 AbstractCegarLoop]: Abstraction has 110025 states and 263656 transitions. [2021-06-05 20:36:53,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 110025 states and 263656 transitions. [2021-06-05 20:36:53,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:53,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:53,149 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:53,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 20:36:53,350 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:53,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1876294115, now seen corresponding path program 172 times [2021-06-05 20:36:53,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:53,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495127350] [2021-06-05 20:36:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:53,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:53,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495127350] [2021-06-05 20:36:53,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495127350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:53,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164429493] [2021-06-05 20:36:53,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:53,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:36:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:53,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:53,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:53,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164429493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:53,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:53,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 20:36:53,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485774723] [2021-06-05 20:36:53,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:36:53,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:53,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:36:53,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:36:53,594 INFO L87 Difference]: Start difference. First operand 110025 states and 263656 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:55,036 INFO L93 Difference]: Finished difference Result 130079 states and 309063 transitions. [2021-06-05 20:36:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 20:36:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:55,243 INFO L225 Difference]: With dead ends: 130079 [2021-06-05 20:36:55,244 INFO L226 Difference]: Without dead ends: 130019 [2021-06-05 20:36:55,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 982.0ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:36:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130019 states. [2021-06-05 20:36:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130019 to 110570. [2021-06-05 20:36:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110570 states, 110569 states have (on average 2.397887292098147) internal successors, (265132), 110569 states have internal predecessors, (265132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110570 states to 110570 states and 265132 transitions. [2021-06-05 20:36:57,620 INFO L78 Accepts]: Start accepts. Automaton has 110570 states and 265132 transitions. Word has length 39 [2021-06-05 20:36:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:36:57,620 INFO L482 AbstractCegarLoop]: Abstraction has 110570 states and 265132 transitions. [2021-06-05 20:36:57,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 110570 states and 265132 transitions. [2021-06-05 20:36:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:36:57,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:36:57,697 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:36:57,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:57,898 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:36:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:36:57,898 INFO L82 PathProgramCache]: Analyzing trace with hash 376494971, now seen corresponding path program 173 times [2021-06-05 20:36:57,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:36:57,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154783021] [2021-06-05 20:36:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:36:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:36:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:57,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:36:57,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154783021] [2021-06-05 20:36:57,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154783021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:57,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562478812] [2021-06-05 20:36:57,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:36:57,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 20:36:57,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:36:57,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:36:57,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:36:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:36:58,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562478812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:36:58,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:36:58,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 20:36:58,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13467270] [2021-06-05 20:36:58,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:36:58,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:36:58,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:36:58,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:36:58,140 INFO L87 Difference]: Start difference. First operand 110570 states and 265132 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:36:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:36:59,707 INFO L93 Difference]: Finished difference Result 118080 states and 281682 transitions. [2021-06-05 20:36:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 20:36:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:36:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:36:59,914 INFO L225 Difference]: With dead ends: 118080 [2021-06-05 20:36:59,914 INFO L226 Difference]: Without dead ends: 118034 [2021-06-05 20:36:59,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 704.4ms TimeCoverageRelationStatistics Valid=1236, Invalid=3320, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 20:37:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118034 states. [2021-06-05 20:37:01,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118034 to 110818. [2021-06-05 20:37:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110818 states, 110817 states have (on average 2.3958237454542175) internal successors, (265498), 110817 states have internal predecessors, (265498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110818 states to 110818 states and 265498 transitions. [2021-06-05 20:37:02,324 INFO L78 Accepts]: Start accepts. Automaton has 110818 states and 265498 transitions. Word has length 39 [2021-06-05 20:37:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:02,324 INFO L482 AbstractCegarLoop]: Abstraction has 110818 states and 265498 transitions. [2021-06-05 20:37:02,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 110818 states and 265498 transitions. [2021-06-05 20:37:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:37:02,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:02,390 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:02,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:02,590 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1048201, now seen corresponding path program 174 times [2021-06-05 20:37:02,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:02,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752974583] [2021-06-05 20:37:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:02,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:02,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752974583] [2021-06-05 20:37:02,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752974583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:02,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971435669] [2021-06-05 20:37:02,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:02,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:37:02,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:02,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:37:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:02,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971435669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:02,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:02,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 20:37:02,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197632032] [2021-06-05 20:37:02,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:37:02,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:02,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:37:02,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:37:02,813 INFO L87 Difference]: Start difference. First operand 110818 states and 265498 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:04,074 INFO L93 Difference]: Finished difference Result 127859 states and 304404 transitions. [2021-06-05 20:37:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 20:37:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:37:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:04,284 INFO L225 Difference]: With dead ends: 127859 [2021-06-05 20:37:04,284 INFO L226 Difference]: Without dead ends: 127831 [2021-06-05 20:37:04,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 722.8ms TimeCoverageRelationStatistics Valid=1314, Invalid=3656, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 20:37:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127831 states. [2021-06-05 20:37:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127831 to 112393. [2021-06-05 20:37:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112393 states, 112392 states have (on average 2.395161577336465) internal successors, (269197), 112392 states have internal predecessors, (269197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112393 states to 112393 states and 269197 transitions. [2021-06-05 20:37:06,893 INFO L78 Accepts]: Start accepts. Automaton has 112393 states and 269197 transitions. Word has length 39 [2021-06-05 20:37:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:06,893 INFO L482 AbstractCegarLoop]: Abstraction has 112393 states and 269197 transitions. [2021-06-05 20:37:06,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 112393 states and 269197 transitions. [2021-06-05 20:37:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:37:06,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:06,978 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:07,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:07,179 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:07,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:07,181 INFO L82 PathProgramCache]: Analyzing trace with hash -385417989, now seen corresponding path program 175 times [2021-06-05 20:37:07,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:07,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196899174] [2021-06-05 20:37:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:07,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:07,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196899174] [2021-06-05 20:37:07,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196899174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:07,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015032940] [2021-06-05 20:37:07,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:37:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:07,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015032940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:07,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:07,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 20:37:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200842724] [2021-06-05 20:37:07,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:37:07,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:37:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:37:07,429 INFO L87 Difference]: Start difference. First operand 112393 states and 269197 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:08,029 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-06-05 20:37:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:09,207 INFO L93 Difference]: Finished difference Result 135846 states and 323820 transitions. [2021-06-05 20:37:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 20:37:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:37:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:09,424 INFO L225 Difference]: With dead ends: 135846 [2021-06-05 20:37:09,424 INFO L226 Difference]: Without dead ends: 135836 [2021-06-05 20:37:09,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1200.5ms TimeCoverageRelationStatistics Valid=1888, Invalid=4754, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 20:37:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135836 states. [2021-06-05 20:37:11,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135836 to 114682. [2021-06-05 20:37:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114682 states, 114681 states have (on average 2.394084460372686) internal successors, (274556), 114681 states have internal predecessors, (274556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114682 states to 114682 states and 274556 transitions. [2021-06-05 20:37:11,797 INFO L78 Accepts]: Start accepts. Automaton has 114682 states and 274556 transitions. Word has length 39 [2021-06-05 20:37:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:11,797 INFO L482 AbstractCegarLoop]: Abstraction has 114682 states and 274556 transitions. [2021-06-05 20:37:11,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:11,797 INFO L276 IsEmpty]: Start isEmpty. Operand 114682 states and 274556 transitions. [2021-06-05 20:37:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:37:11,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:11,872 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:12,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:12,072 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:12,073 INFO L82 PathProgramCache]: Analyzing trace with hash 308891639, now seen corresponding path program 176 times [2021-06-05 20:37:12,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:12,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871144583] [2021-06-05 20:37:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:12,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871144583] [2021-06-05 20:37:12,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871144583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971062980] [2021-06-05 20:37:12,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:12,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:12,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:12,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:37:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:12,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971062980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:12,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:12,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 20:37:12,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596600211] [2021-06-05 20:37:12,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:37:12,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:12,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:37:12,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:37:12,269 INFO L87 Difference]: Start difference. First operand 114682 states and 274556 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:13,316 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 20:37:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:14,343 INFO L93 Difference]: Finished difference Result 145962 states and 347823 transitions. [2021-06-05 20:37:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 20:37:14,343 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:37:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:14,577 INFO L225 Difference]: With dead ends: 145962 [2021-06-05 20:37:14,577 INFO L226 Difference]: Without dead ends: 145960 [2021-06-05 20:37:14,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4125 ImplicationChecksByTransitivity, 1456.1ms TimeCoverageRelationStatistics Valid=3001, Invalid=6899, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 20:37:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145960 states. [2021-06-05 20:37:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145960 to 122785. [2021-06-05 20:37:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122785 states, 122784 states have (on average 2.391614542611415) internal successors, (293652), 122784 states have internal predecessors, (293652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122785 states to 122785 states and 293652 transitions. [2021-06-05 20:37:17,128 INFO L78 Accepts]: Start accepts. Automaton has 122785 states and 293652 transitions. Word has length 39 [2021-06-05 20:37:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:17,129 INFO L482 AbstractCegarLoop]: Abstraction has 122785 states and 293652 transitions. [2021-06-05 20:37:17,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:17,129 INFO L276 IsEmpty]: Start isEmpty. Operand 122785 states and 293652 transitions. [2021-06-05 20:37:17,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:37:17,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:17,207 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:17,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 20:37:17,407 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:17,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1765031547, now seen corresponding path program 177 times [2021-06-05 20:37:17,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:17,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454818385] [2021-06-05 20:37:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:17,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:17,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454818385] [2021-06-05 20:37:17,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454818385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:17,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607724390] [2021-06-05 20:37:17,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:17,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:37:17,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:37:17,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:17,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607724390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:17,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:17,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 20:37:17,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503777209] [2021-06-05 20:37:17,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:37:17,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:17,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:37:17,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:37:17,594 INFO L87 Difference]: Start difference. First operand 122785 states and 293652 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:18,372 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2021-06-05 20:37:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:19,727 INFO L93 Difference]: Finished difference Result 174441 states and 414591 transitions. [2021-06-05 20:37:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 20:37:19,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:37:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:20,009 INFO L225 Difference]: With dead ends: 174441 [2021-06-05 20:37:20,009 INFO L226 Difference]: Without dead ends: 174441 [2021-06-05 20:37:20,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4533 ImplicationChecksByTransitivity, 1469.9ms TimeCoverageRelationStatistics Valid=3252, Invalid=7254, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 20:37:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174441 states. [2021-06-05 20:37:22,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174441 to 156459. [2021-06-05 20:37:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156459 states, 156458 states have (on average 2.3883789898886603) internal successors, (373681), 156458 states have internal predecessors, (373681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156459 states to 156459 states and 373681 transitions. [2021-06-05 20:37:23,373 INFO L78 Accepts]: Start accepts. Automaton has 156459 states and 373681 transitions. Word has length 39 [2021-06-05 20:37:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:23,373 INFO L482 AbstractCegarLoop]: Abstraction has 156459 states and 373681 transitions. [2021-06-05 20:37:23,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 156459 states and 373681 transitions. [2021-06-05 20:37:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:37:23,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:23,458 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:23,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:23,665 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1174683371, now seen corresponding path program 178 times [2021-06-05 20:37:23,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:23,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363106968] [2021-06-05 20:37:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:37:23,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:23,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363106968] [2021-06-05 20:37:23,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363106968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:23,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189895806] [2021-06-05 20:37:23,699 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:23,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:37:23,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:23,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:37:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:23,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189895806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:23,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:23,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 20:37:23,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709680831] [2021-06-05 20:37:23,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:37:23,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:37:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:37:23,872 INFO L87 Difference]: Start difference. First operand 156459 states and 373681 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:25,145 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-06-05 20:37:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:25,875 INFO L93 Difference]: Finished difference Result 172572 states and 409993 transitions. [2021-06-05 20:37:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 20:37:25,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:37:25,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:26,147 INFO L225 Difference]: With dead ends: 172572 [2021-06-05 20:37:26,148 INFO L226 Difference]: Without dead ends: 172563 [2021-06-05 20:37:26,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 1344.4ms TimeCoverageRelationStatistics Valid=2210, Invalid=5446, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 20:37:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172563 states. [2021-06-05 20:37:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172563 to 155092. [2021-06-05 20:37:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155092 states, 155091 states have (on average 2.387295200882063) internal successors, (370248), 155091 states have internal predecessors, (370248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155092 states to 155092 states and 370248 transitions. [2021-06-05 20:37:29,702 INFO L78 Accepts]: Start accepts. Automaton has 155092 states and 370248 transitions. Word has length 39 [2021-06-05 20:37:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:29,703 INFO L482 AbstractCegarLoop]: Abstraction has 155092 states and 370248 transitions. [2021-06-05 20:37:29,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 155092 states and 370248 transitions. [2021-06-05 20:37:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:37:29,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:29,788 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:29,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 20:37:29,993 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:29,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1681029637, now seen corresponding path program 179 times [2021-06-05 20:37:29,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:29,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533893138] [2021-06-05 20:37:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:37:30,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:30,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533893138] [2021-06-05 20:37:30,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533893138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:30,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890264074] [2021-06-05 20:37:30,034 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:30,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 20:37:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:30,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:37:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:30,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890264074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:30,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:30,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 20:37:30,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123696820] [2021-06-05 20:37:30,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 20:37:30,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 20:37:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 20:37:30,187 INFO L87 Difference]: Start difference. First operand 155092 states and 370248 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:32,119 INFO L93 Difference]: Finished difference Result 173448 states and 412084 transitions. [2021-06-05 20:37:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 20:37:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:37:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:32,360 INFO L225 Difference]: With dead ends: 173448 [2021-06-05 20:37:32,360 INFO L226 Difference]: Without dead ends: 173424 [2021-06-05 20:37:32,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 809.3ms TimeCoverageRelationStatistics Valid=1906, Invalid=4900, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 20:37:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173424 states. [2021-06-05 20:37:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173424 to 155270. [2021-06-05 20:37:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155270 states, 155269 states have (on average 2.3872569540603727) internal successors, (370667), 155269 states have internal predecessors, (370667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155270 states to 155270 states and 370667 transitions. [2021-06-05 20:37:35,217 INFO L78 Accepts]: Start accepts. Automaton has 155270 states and 370667 transitions. Word has length 39 [2021-06-05 20:37:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:35,217 INFO L482 AbstractCegarLoop]: Abstraction has 155270 states and 370667 transitions. [2021-06-05 20:37:35,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 155270 states and 370667 transitions. [2021-06-05 20:37:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:37:35,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:35,306 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:35,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:35,509 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash 60306521, now seen corresponding path program 180 times [2021-06-05 20:37:35,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:35,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671597049] [2021-06-05 20:37:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:37:35,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:35,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671597049] [2021-06-05 20:37:35,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671597049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:35,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484387409] [2021-06-05 20:37:35,556 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:35,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 20:37:35,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:35,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:37:35,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:36,031 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 20:37:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:36,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484387409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:36,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:36,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 20:37:36,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944786257] [2021-06-05 20:37:36,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:37:36,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:36,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:37:36,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:37:36,224 INFO L87 Difference]: Start difference. First operand 155270 states and 370667 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:37,649 INFO L93 Difference]: Finished difference Result 177004 states and 420370 transitions. [2021-06-05 20:37:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 20:37:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:37:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:37,937 INFO L225 Difference]: With dead ends: 177004 [2021-06-05 20:37:37,937 INFO L226 Difference]: Without dead ends: 176962 [2021-06-05 20:37:37,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 1232.9ms TimeCoverageRelationStatistics Valid=1631, Invalid=4375, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 20:37:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176962 states. [2021-06-05 20:37:40,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176962 to 160878. [2021-06-05 20:37:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160878 states, 160877 states have (on average 2.3859283800667592) internal successors, (383841), 160877 states have internal predecessors, (383841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160878 states to 160878 states and 383841 transitions. [2021-06-05 20:37:41,373 INFO L78 Accepts]: Start accepts. Automaton has 160878 states and 383841 transitions. Word has length 39 [2021-06-05 20:37:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:41,373 INFO L482 AbstractCegarLoop]: Abstraction has 160878 states and 383841 transitions. [2021-06-05 20:37:41,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 160878 states and 383841 transitions. [2021-06-05 20:37:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:37:41,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:41,464 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:41,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 20:37:41,665 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:41,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1590788411, now seen corresponding path program 181 times [2021-06-05 20:37:41,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:41,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477635271] [2021-06-05 20:37:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:37:41,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477635271] [2021-06-05 20:37:41,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477635271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306398228] [2021-06-05 20:37:41,716 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:41,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:37:41,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:41,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306398228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:41,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:41,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 20:37:41,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436822047] [2021-06-05 20:37:41,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:37:41,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:41,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:37:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:37:41,880 INFO L87 Difference]: Start difference. First operand 160878 states and 383841 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:43,658 INFO L93 Difference]: Finished difference Result 185101 states and 439455 transitions. [2021-06-05 20:37:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 20:37:43,658 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:37:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:43,951 INFO L225 Difference]: With dead ends: 185101 [2021-06-05 20:37:43,951 INFO L226 Difference]: Without dead ends: 185041 [2021-06-05 20:37:43,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 1163.2ms TimeCoverageRelationStatistics Valid=1390, Invalid=3866, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 20:37:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185041 states. [2021-06-05 20:37:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185041 to 168617. [2021-06-05 20:37:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168617 states, 168616 states have (on average 2.384738103145609) internal successors, (402105), 168616 states have internal predecessors, (402105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168617 states to 168617 states and 402105 transitions. [2021-06-05 20:37:47,650 INFO L78 Accepts]: Start accepts. Automaton has 168617 states and 402105 transitions. Word has length 39 [2021-06-05 20:37:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:47,650 INFO L482 AbstractCegarLoop]: Abstraction has 168617 states and 402105 transitions. [2021-06-05 20:37:47,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 168617 states and 402105 transitions. [2021-06-05 20:37:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 20:37:47,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:47,743 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:47,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:47,944 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash 803959065, now seen corresponding path program 182 times [2021-06-05 20:37:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:47,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249073193] [2021-06-05 20:37:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:48,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:48,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249073193] [2021-06-05 20:37:48,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249073193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:48,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089472088] [2021-06-05 20:37:48,003 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:48,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:37:48,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:48,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:37:48,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:48,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089472088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:48,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:48,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 20:37:48,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804066296] [2021-06-05 20:37:48,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:37:48,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:48,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:37:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:37:48,175 INFO L87 Difference]: Start difference. First operand 168617 states and 402105 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:49,898 INFO L93 Difference]: Finished difference Result 187528 states and 445303 transitions. [2021-06-05 20:37:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 20:37:49,898 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 20:37:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:50,218 INFO L225 Difference]: With dead ends: 187528 [2021-06-05 20:37:50,219 INFO L226 Difference]: Without dead ends: 187450 [2021-06-05 20:37:50,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 20:37:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187450 states. [2021-06-05 20:37:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187450 to 171356. [2021-06-05 20:37:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171356 states, 171355 states have (on average 2.384062326748563) internal successors, (408521), 171355 states have internal predecessors, (408521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171356 states to 171356 states and 408521 transitions. [2021-06-05 20:37:53,935 INFO L78 Accepts]: Start accepts. Automaton has 171356 states and 408521 transitions. Word has length 39 [2021-06-05 20:37:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:53,935 INFO L482 AbstractCegarLoop]: Abstraction has 171356 states and 408521 transitions. [2021-06-05 20:37:53,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 171356 states and 408521 transitions. [2021-06-05 20:37:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 20:37:54,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:54,055 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:54,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:54,255 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:54,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1772283020, now seen corresponding path program 183 times [2021-06-05 20:37:54,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:54,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628211489] [2021-06-05 20:37:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:54,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:54,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628211489] [2021-06-05 20:37:54,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628211489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:54,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031628863] [2021-06-05 20:37:54,297 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:54,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:37:54,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 20:37:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:37:54,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031628863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:54,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:54,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 20:37:54,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494296499] [2021-06-05 20:37:54,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 20:37:54,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:54,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 20:37:54,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:37:54,377 INFO L87 Difference]: Start difference. First operand 171356 states and 408521 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:37:54,909 INFO L93 Difference]: Finished difference Result 179614 states and 428887 transitions. [2021-06-05 20:37:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:37:54,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 20:37:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:37:55,206 INFO L225 Difference]: With dead ends: 179614 [2021-06-05 20:37:55,207 INFO L226 Difference]: Without dead ends: 179566 [2021-06-05 20:37:55,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:37:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179566 states. [2021-06-05 20:37:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179566 to 173156. [2021-06-05 20:37:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173156 states, 173155 states have (on average 2.385163581762005) internal successors, (413003), 173155 states have internal predecessors, (413003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173156 states to 173156 states and 413003 transitions. [2021-06-05 20:37:58,952 INFO L78 Accepts]: Start accepts. Automaton has 173156 states and 413003 transitions. Word has length 42 [2021-06-05 20:37:58,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:37:58,952 INFO L482 AbstractCegarLoop]: Abstraction has 173156 states and 413003 transitions. [2021-06-05 20:37:58,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:37:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 173156 states and 413003 transitions. [2021-06-05 20:37:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 20:37:59,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:37:59,075 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:37:59,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:59,275 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:37:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:37:59,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1176198118, now seen corresponding path program 184 times [2021-06-05 20:37:59,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:37:59,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900035428] [2021-06-05 20:37:59,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:37:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:37:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:37:59,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:37:59,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900035428] [2021-06-05 20:37:59,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900035428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:59,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960429379] [2021-06-05 20:37:59,322 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:37:59,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:37:59,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:37:59,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 20:37:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:37:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:37:59,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960429379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:37:59,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:37:59,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 20:37:59,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077459896] [2021-06-05 20:37:59,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 20:37:59,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:37:59,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 20:37:59,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:37:59,396 INFO L87 Difference]: Start difference. First operand 173156 states and 413003 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:00,590 INFO L93 Difference]: Finished difference Result 189181 states and 453042 transitions. [2021-06-05 20:38:00,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:38:00,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 20:38:00,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:00,906 INFO L225 Difference]: With dead ends: 189181 [2021-06-05 20:38:00,906 INFO L226 Difference]: Without dead ends: 189127 [2021-06-05 20:38:00,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:38:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189127 states. [2021-06-05 20:38:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189127 to 175216. [2021-06-05 20:38:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175216 states, 175215 states have (on average 2.388534086693491) internal successors, (418507), 175215 states have internal predecessors, (418507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175216 states to 175216 states and 418507 transitions. [2021-06-05 20:38:04,773 INFO L78 Accepts]: Start accepts. Automaton has 175216 states and 418507 transitions. Word has length 42 [2021-06-05 20:38:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:04,773 INFO L482 AbstractCegarLoop]: Abstraction has 175216 states and 418507 transitions. [2021-06-05 20:38:04,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 175216 states and 418507 transitions. [2021-06-05 20:38:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 20:38:04,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:04,893 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:05,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:05,094 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1533767512, now seen corresponding path program 185 times [2021-06-05 20:38:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:05,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338712479] [2021-06-05 20:38:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:38:05,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:05,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338712479] [2021-06-05 20:38:05,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338712479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:05,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589180750] [2021-06-05 20:38:05,138 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:05,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 20:38:05,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:05,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 20:38:05,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:38:05,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589180750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:05,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:05,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 20:38:05,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046974448] [2021-06-05 20:38:05,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 20:38:05,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:05,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 20:38:05,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:38:05,213 INFO L87 Difference]: Start difference. First operand 175216 states and 418507 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:05,860 INFO L93 Difference]: Finished difference Result 201846 states and 485027 transitions. [2021-06-05 20:38:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:38:05,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 20:38:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:06,922 INFO L225 Difference]: With dead ends: 201846 [2021-06-05 20:38:06,923 INFO L226 Difference]: Without dead ends: 201795 [2021-06-05 20:38:06,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:38:07,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201795 states. [2021-06-05 20:38:09,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201795 to 182044. [2021-06-05 20:38:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182044 states, 182043 states have (on average 2.3974830122553463) internal successors, (436445), 182043 states have internal predecessors, (436445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182044 states to 182044 states and 436445 transitions. [2021-06-05 20:38:10,730 INFO L78 Accepts]: Start accepts. Automaton has 182044 states and 436445 transitions. Word has length 42 [2021-06-05 20:38:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:10,730 INFO L482 AbstractCegarLoop]: Abstraction has 182044 states and 436445 transitions. [2021-06-05 20:38:10,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 182044 states and 436445 transitions. [2021-06-05 20:38:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 20:38:10,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:10,844 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:11,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-06-05 20:38:11,045 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1619587930, now seen corresponding path program 186 times [2021-06-05 20:38:11,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:11,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769598405] [2021-06-05 20:38:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:38:11,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:11,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769598405] [2021-06-05 20:38:11,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769598405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:11,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530734240] [2021-06-05 20:38:11,086 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:11,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 20:38:11,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:11,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 20:38:11,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:38:11,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530734240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:11,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:11,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 20:38:11,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300056242] [2021-06-05 20:38:11,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 20:38:11,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:11,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 20:38:11,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:38:11,167 INFO L87 Difference]: Start difference. First operand 182044 states and 436445 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:11,820 INFO L93 Difference]: Finished difference Result 217671 states and 524469 transitions. [2021-06-05 20:38:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:38:11,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 20:38:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:12,203 INFO L225 Difference]: With dead ends: 217671 [2021-06-05 20:38:12,203 INFO L226 Difference]: Without dead ends: 217623 [2021-06-05 20:38:12,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:38:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217623 states. [2021-06-05 20:38:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217623 to 191338. [2021-06-05 20:38:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191338 states, 191337 states have (on average 2.410103639128867) internal successors, (461142), 191337 states have internal predecessors, (461142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191338 states to 191338 states and 461142 transitions. [2021-06-05 20:38:17,057 INFO L78 Accepts]: Start accepts. Automaton has 191338 states and 461142 transitions. Word has length 42 [2021-06-05 20:38:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:17,057 INFO L482 AbstractCegarLoop]: Abstraction has 191338 states and 461142 transitions. [2021-06-05 20:38:17,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand 191338 states and 461142 transitions. [2021-06-05 20:38:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 20:38:17,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:17,200 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:17,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:17,423 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:17,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1504847848, now seen corresponding path program 187 times [2021-06-05 20:38:17,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:17,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206689928] [2021-06-05 20:38:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:38:17,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:17,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206689928] [2021-06-05 20:38:17,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206689928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:17,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577507174] [2021-06-05 20:38:17,513 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 20:38:17,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:38:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577507174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:17,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:17,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 20:38:17,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846201902] [2021-06-05 20:38:17,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 20:38:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 20:38:17,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:38:17,686 INFO L87 Difference]: Start difference. First operand 191338 states and 461142 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:18,594 INFO L93 Difference]: Finished difference Result 236403 states and 570535 transitions. [2021-06-05 20:38:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:38:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 20:38:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:19,145 INFO L225 Difference]: With dead ends: 236403 [2021-06-05 20:38:19,145 INFO L226 Difference]: Without dead ends: 236358 [2021-06-05 20:38:19,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:38:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236358 states. [2021-06-05 20:38:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236358 to 203065. [2021-06-05 20:38:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203065 states, 203064 states have (on average 2.4200498365047474) internal successors, (491425), 203064 states have internal predecessors, (491425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203065 states to 203065 states and 491425 transitions. [2021-06-05 20:38:23,978 INFO L78 Accepts]: Start accepts. Automaton has 203065 states and 491425 transitions. Word has length 42 [2021-06-05 20:38:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:23,978 INFO L482 AbstractCegarLoop]: Abstraction has 203065 states and 491425 transitions. [2021-06-05 20:38:23,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 203065 states and 491425 transitions. [2021-06-05 20:38:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 20:38:24,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:24,081 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:24,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:24,282 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1039871334, now seen corresponding path program 188 times [2021-06-05 20:38:24,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:24,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362845108] [2021-06-05 20:38:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:38:24,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:24,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362845108] [2021-06-05 20:38:24,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362845108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:24,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537255167] [2021-06-05 20:38:24,325 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:24,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:38:24,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:24,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 20:38:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:38:24,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537255167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:24,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:24,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 20:38:24,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365021630] [2021-06-05 20:38:24,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 20:38:24,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 20:38:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:38:24,407 INFO L87 Difference]: Start difference. First operand 203065 states and 491425 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:25,131 INFO L93 Difference]: Finished difference Result 262746 states and 634691 transitions. [2021-06-05 20:38:25,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 20:38:25,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 20:38:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:25,607 INFO L225 Difference]: With dead ends: 262746 [2021-06-05 20:38:25,607 INFO L226 Difference]: Without dead ends: 262710 [2021-06-05 20:38:25,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 20:38:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262710 states. [2021-06-05 20:38:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262710 to 262150. [2021-06-05 20:38:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262150 states, 262149 states have (on average 2.4153134286226536) internal successors, (633172), 262149 states have internal predecessors, (633172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262150 states to 262150 states and 633172 transitions. [2021-06-05 20:38:31,475 INFO L78 Accepts]: Start accepts. Automaton has 262150 states and 633172 transitions. Word has length 42 [2021-06-05 20:38:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:31,475 INFO L482 AbstractCegarLoop]: Abstraction has 262150 states and 633172 transitions. [2021-06-05 20:38:31,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 262150 states and 633172 transitions. [2021-06-05 20:38:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:38:31,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:31,667 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:31,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 20:38:31,868 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash -22681009, now seen corresponding path program 189 times [2021-06-05 20:38:31,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:31,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31652219] [2021-06-05 20:38:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:31,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:31,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31652219] [2021-06-05 20:38:31,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31652219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:31,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671873063] [2021-06-05 20:38:31,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:31,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 20:38:31,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:31,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:38:31,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:32,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671873063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:32,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:32,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 20:38:32,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145915691] [2021-06-05 20:38:32,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:38:32,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:32,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:38:32,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:38:32,090 INFO L87 Difference]: Start difference. First operand 262150 states and 633172 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:34,043 INFO L93 Difference]: Finished difference Result 309777 states and 746150 transitions. [2021-06-05 20:38:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:38:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:38:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:34,649 INFO L225 Difference]: With dead ends: 309777 [2021-06-05 20:38:34,650 INFO L226 Difference]: Without dead ends: 309777 [2021-06-05 20:38:34,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=350, Invalid=840, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:38:34,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309777 states. [2021-06-05 20:38:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309777 to 263197. [2021-06-05 20:38:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263197 states, 263196 states have (on average 2.415013905986413) internal successors, (635622), 263196 states have internal predecessors, (635622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263197 states to 263197 states and 635622 transitions. [2021-06-05 20:38:39,918 INFO L78 Accepts]: Start accepts. Automaton has 263197 states and 635622 transitions. Word has length 45 [2021-06-05 20:38:39,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:39,918 INFO L482 AbstractCegarLoop]: Abstraction has 263197 states and 635622 transitions. [2021-06-05 20:38:39,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 263197 states and 635622 transitions. [2021-06-05 20:38:40,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:38:40,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:40,880 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:41,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 20:38:41,080 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:41,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash -876445635, now seen corresponding path program 190 times [2021-06-05 20:38:41,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:41,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462482231] [2021-06-05 20:38:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:41,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:41,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462482231] [2021-06-05 20:38:41,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462482231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:41,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692717202] [2021-06-05 20:38:41,157 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:41,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:38:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:41,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:38:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:41,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692717202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:41,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:41,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 20:38:41,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960643291] [2021-06-05 20:38:41,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:38:41,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:41,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:38:41,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:38:41,308 INFO L87 Difference]: Start difference. First operand 263197 states and 635622 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:42,376 INFO L93 Difference]: Finished difference Result 355588 states and 850593 transitions. [2021-06-05 20:38:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:38:42,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:38:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:43,725 INFO L225 Difference]: With dead ends: 355588 [2021-06-05 20:38:43,725 INFO L226 Difference]: Without dead ends: 355535 [2021-06-05 20:38:43,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:38:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355535 states. [2021-06-05 20:38:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355535 to 263197. [2021-06-05 20:38:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263197 states, 263196 states have (on average 2.415006307086734) internal successors, (635620), 263196 states have internal predecessors, (635620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263197 states to 263197 states and 635620 transitions. [2021-06-05 20:38:49,019 INFO L78 Accepts]: Start accepts. Automaton has 263197 states and 635620 transitions. Word has length 45 [2021-06-05 20:38:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:38:49,019 INFO L482 AbstractCegarLoop]: Abstraction has 263197 states and 635620 transitions. [2021-06-05 20:38:49,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 263197 states and 635620 transitions. [2021-06-05 20:38:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:38:50,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:38:50,021 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:38:50,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 20:38:50,225 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:38:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:38:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash -310024295, now seen corresponding path program 191 times [2021-06-05 20:38:50,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:38:50,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649666479] [2021-06-05 20:38:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:38:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:38:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:50,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:38:50,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649666479] [2021-06-05 20:38:50,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649666479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:50,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676132159] [2021-06-05 20:38:50,304 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:38:50,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 20:38:50,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:38:50,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:38:50,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:38:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:38:50,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676132159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:38:50,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:38:50,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 20:38:50,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501121689] [2021-06-05 20:38:50,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:38:50,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:38:50,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:38:50,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:38:50,474 INFO L87 Difference]: Start difference. First operand 263197 states and 635620 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:38:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:38:53,637 INFO L93 Difference]: Finished difference Result 386155 states and 924736 transitions. [2021-06-05 20:38:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-06-05 20:38:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:38:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:38:54,315 INFO L225 Difference]: With dead ends: 386155 [2021-06-05 20:38:54,316 INFO L226 Difference]: Without dead ends: 386133 [2021-06-05 20:38:54,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8523 ImplicationChecksByTransitivity, 1514.9ms TimeCoverageRelationStatistics Valid=4971, Invalid=13661, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 20:38:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386133 states. [2021-06-05 20:39:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386133 to 294615. [2021-06-05 20:39:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294615 states, 294614 states have (on average 2.4227531617642066) internal successors, (713777), 294614 states have internal predecessors, (713777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294615 states to 294615 states and 713777 transitions. [2021-06-05 20:39:01,435 INFO L78 Accepts]: Start accepts. Automaton has 294615 states and 713777 transitions. Word has length 45 [2021-06-05 20:39:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:01,436 INFO L482 AbstractCegarLoop]: Abstraction has 294615 states and 713777 transitions. [2021-06-05 20:39:01,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 294615 states and 713777 transitions. [2021-06-05 20:39:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:39:01,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:01,640 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:01,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:01,841 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:01,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1005376361, now seen corresponding path program 192 times [2021-06-05 20:39:01,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:01,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240801133] [2021-06-05 20:39:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:01,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:01,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240801133] [2021-06-05 20:39:01,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240801133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:01,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651863280] [2021-06-05 20:39:01,912 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:01,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 20:39:01,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:01,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:39:01,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:02,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651863280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:02,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:02,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 20:39:02,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021286758] [2021-06-05 20:39:02,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:39:02,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:02,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:39:02,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:39:02,069 INFO L87 Difference]: Start difference. First operand 294615 states and 713777 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:04,793 INFO L93 Difference]: Finished difference Result 321923 states and 777561 transitions. [2021-06-05 20:39:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 20:39:04,793 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:39:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:05,354 INFO L225 Difference]: With dead ends: 321923 [2021-06-05 20:39:05,354 INFO L226 Difference]: Without dead ends: 321919 [2021-06-05 20:39:05,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 1546.5ms TimeCoverageRelationStatistics Valid=2822, Invalid=5550, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 20:39:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321919 states. [2021-06-05 20:39:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321919 to 298475. [2021-06-05 20:39:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298475 states, 298474 states have (on average 2.4247740171673247) internal successors, (723732), 298474 states have internal predecessors, (723732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298475 states to 298475 states and 723732 transitions. [2021-06-05 20:39:12,494 INFO L78 Accepts]: Start accepts. Automaton has 298475 states and 723732 transitions. Word has length 45 [2021-06-05 20:39:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:12,494 INFO L482 AbstractCegarLoop]: Abstraction has 298475 states and 723732 transitions. [2021-06-05 20:39:12,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 298475 states and 723732 transitions. [2021-06-05 20:39:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:39:12,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:12,701 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:12,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 20:39:12,901 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:12,902 INFO L82 PathProgramCache]: Analyzing trace with hash 693501331, now seen corresponding path program 193 times [2021-06-05 20:39:12,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:12,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959306256] [2021-06-05 20:39:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:12,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:12,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959306256] [2021-06-05 20:39:12,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959306256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:12,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777164811] [2021-06-05 20:39:12,974 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:39:12,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:13,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777164811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:13,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:13,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 20:39:13,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32927902] [2021-06-05 20:39:13,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:39:13,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:39:13,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:39:13,157 INFO L87 Difference]: Start difference. First operand 298475 states and 723732 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:16,668 INFO L93 Difference]: Finished difference Result 325043 states and 784322 transitions. [2021-06-05 20:39:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 20:39:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:39:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:17,436 INFO L225 Difference]: With dead ends: 325043 [2021-06-05 20:39:17,436 INFO L226 Difference]: Without dead ends: 325043 [2021-06-05 20:39:17,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3338 ImplicationChecksByTransitivity, 1205.2ms TimeCoverageRelationStatistics Valid=3745, Invalid=7597, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 20:39:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325043 states. [2021-06-05 20:39:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325043 to 289680. [2021-06-05 20:39:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289680 states, 289679 states have (on average 2.4213595048312095) internal successors, (701417), 289679 states have internal predecessors, (701417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:24,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289680 states to 289680 states and 701417 transitions. [2021-06-05 20:39:24,621 INFO L78 Accepts]: Start accepts. Automaton has 289680 states and 701417 transitions. Word has length 45 [2021-06-05 20:39:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:24,621 INFO L482 AbstractCegarLoop]: Abstraction has 289680 states and 701417 transitions. [2021-06-05 20:39:24,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand 289680 states and 701417 transitions. [2021-06-05 20:39:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:39:24,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:24,831 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:25,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 20:39:25,033 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1045228083, now seen corresponding path program 194 times [2021-06-05 20:39:25,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:25,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311087298] [2021-06-05 20:39:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:25,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:25,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311087298] [2021-06-05 20:39:25,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311087298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:25,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052789670] [2021-06-05 20:39:25,104 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:25,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:39:25,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:39:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:25,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052789670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:25,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:25,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 20:39:25,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293852390] [2021-06-05 20:39:25,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:39:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:39:25,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:39:25,287 INFO L87 Difference]: Start difference. First operand 289680 states and 701417 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:27,861 INFO L93 Difference]: Finished difference Result 379195 states and 907809 transitions. [2021-06-05 20:39:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 20:39:27,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:39:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:28,515 INFO L225 Difference]: With dead ends: 379195 [2021-06-05 20:39:28,515 INFO L226 Difference]: Without dead ends: 379189 [2021-06-05 20:39:28,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=1565, Invalid=5077, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 20:39:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379189 states. [2021-06-05 20:39:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379189 to 270635. [2021-06-05 20:39:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270635 states, 270634 states have (on average 2.4130079738687673) internal successors, (653042), 270634 states have internal predecessors, (653042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270635 states to 270635 states and 653042 transitions. [2021-06-05 20:39:34,834 INFO L78 Accepts]: Start accepts. Automaton has 270635 states and 653042 transitions. Word has length 45 [2021-06-05 20:39:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:34,834 INFO L482 AbstractCegarLoop]: Abstraction has 270635 states and 653042 transitions. [2021-06-05 20:39:34,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 270635 states and 653042 transitions. [2021-06-05 20:39:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:39:35,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:35,878 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:36,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:36,089 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:36,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:36,089 INFO L82 PathProgramCache]: Analyzing trace with hash 538881817, now seen corresponding path program 195 times [2021-06-05 20:39:36,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:36,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325807040] [2021-06-05 20:39:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:36,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:36,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325807040] [2021-06-05 20:39:36,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325807040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:36,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315099487] [2021-06-05 20:39:36,160 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:36,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 20:39:36,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:36,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:39:36,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:36,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315099487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:36,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:36,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 20:39:36,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841693934] [2021-06-05 20:39:36,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:39:36,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:39:36,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:39:36,329 INFO L87 Difference]: Start difference. First operand 270635 states and 653042 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:38,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:38,861 INFO L93 Difference]: Finished difference Result 363994 states and 870271 transitions. [2021-06-05 20:39:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 20:39:38,862 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:39:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:39,544 INFO L225 Difference]: With dead ends: 363994 [2021-06-05 20:39:39,544 INFO L226 Difference]: Without dead ends: 363970 [2021-06-05 20:39:39,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 708.3ms TimeCoverageRelationStatistics Valid=1359, Invalid=4647, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 20:39:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363970 states. [2021-06-05 20:39:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363970 to 271973. [2021-06-05 20:39:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271973 states, 271972 states have (on average 2.4125571750033092) internal successors, (656148), 271972 states have internal predecessors, (656148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271973 states to 271973 states and 656148 transitions. [2021-06-05 20:39:45,795 INFO L78 Accepts]: Start accepts. Automaton has 271973 states and 656148 transitions. Word has length 45 [2021-06-05 20:39:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:45,795 INFO L482 AbstractCegarLoop]: Abstraction has 271973 states and 656148 transitions. [2021-06-05 20:39:45,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 271973 states and 656148 transitions. [2021-06-05 20:39:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:39:45,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:45,985 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:46,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 20:39:46,186 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:46,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:46,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2014749321, now seen corresponding path program 196 times [2021-06-05 20:39:46,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:46,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450882222] [2021-06-05 20:39:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:46,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:46,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450882222] [2021-06-05 20:39:46,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450882222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519842854] [2021-06-05 20:39:46,267 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:46,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:39:46,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:46,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:39:46,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:46,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519842854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:46,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:46,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 20:39:46,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404590819] [2021-06-05 20:39:46,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:39:46,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:46,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:39:46,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:39:46,450 INFO L87 Difference]: Start difference. First operand 271973 states and 656148 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:48,852 INFO L93 Difference]: Finished difference Result 368171 states and 880763 transitions. [2021-06-05 20:39:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 20:39:48,852 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:39:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:39:49,507 INFO L225 Difference]: With dead ends: 368171 [2021-06-05 20:39:49,507 INFO L226 Difference]: Without dead ends: 368129 [2021-06-05 20:39:49,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 675.7ms TimeCoverageRelationStatistics Valid=1185, Invalid=4217, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 20:39:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368129 states. [2021-06-05 20:39:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368129 to 272204. [2021-06-05 20:39:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272204 states, 272203 states have (on average 2.4128903796063965) internal successors, (656796), 272203 states have internal predecessors, (656796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272204 states to 272204 states and 656796 transitions. [2021-06-05 20:39:56,498 INFO L78 Accepts]: Start accepts. Automaton has 272204 states and 656796 transitions. Word has length 45 [2021-06-05 20:39:56,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:39:56,498 INFO L482 AbstractCegarLoop]: Abstraction has 272204 states and 656796 transitions. [2021-06-05 20:39:56,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 272204 states and 656796 transitions. [2021-06-05 20:39:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:39:56,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:39:56,783 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:39:56,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:56,984 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:39:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:39:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash -484267431, now seen corresponding path program 197 times [2021-06-05 20:39:56,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:39:56,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250519174] [2021-06-05 20:39:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:39:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:39:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:57,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:39:57,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250519174] [2021-06-05 20:39:57,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250519174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:57,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347144332] [2021-06-05 20:39:57,054 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:39:57,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 20:39:57,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:39:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:39:57,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:39:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:39:57,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347144332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:39:57,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:39:57,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 20:39:57,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092008318] [2021-06-05 20:39:57,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:39:57,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:39:57,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:39:57,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:39:57,213 INFO L87 Difference]: Start difference. First operand 272204 states and 656796 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:39:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:39:59,632 INFO L93 Difference]: Finished difference Result 373969 states and 895123 transitions. [2021-06-05 20:39:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 20:39:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:39:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:00,344 INFO L225 Difference]: With dead ends: 373969 [2021-06-05 20:40:00,344 INFO L226 Difference]: Without dead ends: 373909 [2021-06-05 20:40:00,344 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 615.3ms TimeCoverageRelationStatistics Valid=1044, Invalid=3786, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 20:40:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373909 states. [2021-06-05 20:40:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373909 to 272546. [2021-06-05 20:40:06,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272546 states, 272545 states have (on average 2.4128272395384247) internal successors, (657604), 272545 states have internal predecessors, (657604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272546 states to 272546 states and 657604 transitions. [2021-06-05 20:40:06,913 INFO L78 Accepts]: Start accepts. Automaton has 272546 states and 657604 transitions. Word has length 45 [2021-06-05 20:40:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:06,914 INFO L482 AbstractCegarLoop]: Abstraction has 272546 states and 657604 transitions. [2021-06-05 20:40:06,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 272546 states and 657604 transitions. [2021-06-05 20:40:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:40:07,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:07,106 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:07,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 20:40:07,306 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:07,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1271096777, now seen corresponding path program 198 times [2021-06-05 20:40:07,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:07,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745797947] [2021-06-05 20:40:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:07,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745797947] [2021-06-05 20:40:07,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745797947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128845005] [2021-06-05 20:40:07,388 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:07,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:40:07,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:07,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:40:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:07,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128845005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:07,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:07,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 20:40:07,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599399095] [2021-06-05 20:40:07,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:40:07,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:07,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:40:07,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:40:07,555 INFO L87 Difference]: Start difference. First operand 272546 states and 657604 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:09,914 INFO L93 Difference]: Finished difference Result 376115 states and 899396 transitions. [2021-06-05 20:40:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 20:40:09,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:40:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:10,579 INFO L225 Difference]: With dead ends: 376115 [2021-06-05 20:40:10,579 INFO L226 Difference]: Without dead ends: 376037 [2021-06-05 20:40:10,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 596.3ms TimeCoverageRelationStatistics Valid=937, Invalid=3353, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 20:40:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376037 states. [2021-06-05 20:40:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376037 to 273080. [2021-06-05 20:40:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273080 states, 273079 states have (on average 2.4126241856752078) internal successors, (658837), 273079 states have internal predecessors, (658837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273080 states to 273080 states and 658837 transitions. [2021-06-05 20:40:18,179 INFO L78 Accepts]: Start accepts. Automaton has 273080 states and 658837 transitions. Word has length 45 [2021-06-05 20:40:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:18,179 INFO L482 AbstractCegarLoop]: Abstraction has 273080 states and 658837 transitions. [2021-06-05 20:40:18,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 273080 states and 658837 transitions. [2021-06-05 20:40:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:40:18,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:18,886 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:19,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:19,086 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:19,087 INFO L82 PathProgramCache]: Analyzing trace with hash 227358105, now seen corresponding path program 199 times [2021-06-05 20:40:19,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:19,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766647130] [2021-06-05 20:40:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:19,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:19,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766647130] [2021-06-05 20:40:19,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766647130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:19,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717822459] [2021-06-05 20:40:19,176 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:19,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:40:19,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:19,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717822459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:19,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:19,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 20:40:19,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024061264] [2021-06-05 20:40:19,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:40:19,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:19,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:40:19,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:40:19,376 INFO L87 Difference]: Start difference. First operand 273080 states and 658837 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:21,091 INFO L93 Difference]: Finished difference Result 358158 states and 855702 transitions. [2021-06-05 20:40:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 20:40:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:40:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:22,570 INFO L225 Difference]: With dead ends: 358158 [2021-06-05 20:40:22,570 INFO L226 Difference]: Without dead ends: 358110 [2021-06-05 20:40:22,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=619, Invalid=2033, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 20:40:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358110 states. [2021-06-05 20:40:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358110 to 273080. [2021-06-05 20:40:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273080 states, 273079 states have (on average 2.4125362990196977) internal successors, (658813), 273079 states have internal predecessors, (658813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273080 states to 273080 states and 658813 transitions. [2021-06-05 20:40:28,943 INFO L78 Accepts]: Start accepts. Automaton has 273080 states and 658813 transitions. Word has length 45 [2021-06-05 20:40:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:28,943 INFO L482 AbstractCegarLoop]: Abstraction has 273080 states and 658813 transitions. [2021-06-05 20:40:28,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 273080 states and 658813 transitions. [2021-06-05 20:40:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:40:29,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:29,135 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:29,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 20:40:29,337 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2111463515, now seen corresponding path program 200 times [2021-06-05 20:40:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:29,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555589487] [2021-06-05 20:40:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:29,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:29,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555589487] [2021-06-05 20:40:29,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555589487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:29,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230943910] [2021-06-05 20:40:29,409 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:29,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:40:29,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:29,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:40:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:29,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230943910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:29,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:29,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 20:40:29,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628092249] [2021-06-05 20:40:29,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:40:29,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:29,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:40:29,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:40:29,582 INFO L87 Difference]: Start difference. First operand 273080 states and 658813 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:32,249 INFO L93 Difference]: Finished difference Result 289038 states and 696705 transitions. [2021-06-05 20:40:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 20:40:32,249 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:40:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:32,759 INFO L225 Difference]: With dead ends: 289038 [2021-06-05 20:40:32,759 INFO L226 Difference]: Without dead ends: 289018 [2021-06-05 20:40:32,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2704 ImplicationChecksByTransitivity, 1026.8ms TimeCoverageRelationStatistics Valid=3038, Invalid=6664, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 20:40:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289018 states. [2021-06-05 20:40:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289018 to 281752. [2021-06-05 20:40:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281752 states, 281751 states have (on average 2.4145113948131507) internal successors, (680291), 281751 states have internal predecessors, (680291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281752 states to 281752 states and 680291 transitions. [2021-06-05 20:40:39,138 INFO L78 Accepts]: Start accepts. Automaton has 281752 states and 680291 transitions. Word has length 45 [2021-06-05 20:40:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:39,138 INFO L482 AbstractCegarLoop]: Abstraction has 281752 states and 680291 transitions. [2021-06-05 20:40:39,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 281752 states and 680291 transitions. [2021-06-05 20:40:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:40:40,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:40,180 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:40,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:40,380 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash 755027493, now seen corresponding path program 201 times [2021-06-05 20:40:40,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:40,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483917957] [2021-06-05 20:40:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:40,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:40,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483917957] [2021-06-05 20:40:40,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483917957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:40,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984295116] [2021-06-05 20:40:40,445 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:40,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 20:40:40,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:40,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:40:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:40,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984295116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:40,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:40,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 20:40:40,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969999466] [2021-06-05 20:40:40,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:40:40,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:40,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:40:40,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:40:40,615 INFO L87 Difference]: Start difference. First operand 281752 states and 680291 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:43,477 INFO L93 Difference]: Finished difference Result 294531 states and 708502 transitions. [2021-06-05 20:40:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 20:40:43,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:40:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:43,980 INFO L225 Difference]: With dead ends: 294531 [2021-06-05 20:40:43,981 INFO L226 Difference]: Without dead ends: 294501 [2021-06-05 20:40:43,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3314 ImplicationChecksByTransitivity, 1167.0ms TimeCoverageRelationStatistics Valid=3528, Invalid=7392, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 20:40:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294501 states. [2021-06-05 20:40:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294501 to 265452. [2021-06-05 20:40:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265452 states, 265451 states have (on average 2.409721568199027) internal successors, (639663), 265451 states have internal predecessors, (639663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265452 states to 265452 states and 639663 transitions. [2021-06-05 20:40:50,048 INFO L78 Accepts]: Start accepts. Automaton has 265452 states and 639663 transitions. Word has length 45 [2021-06-05 20:40:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:40:50,048 INFO L482 AbstractCegarLoop]: Abstraction has 265452 states and 639663 transitions. [2021-06-05 20:40:50,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 265452 states and 639663 transitions. [2021-06-05 20:40:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:40:51,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:40:51,004 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:40:51,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 20:40:51,204 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:40:51,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:40:51,204 INFO L82 PathProgramCache]: Analyzing trace with hash 130763347, now seen corresponding path program 202 times [2021-06-05 20:40:51,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:40:51,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156820410] [2021-06-05 20:40:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:40:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:40:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:51,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:40:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156820410] [2021-06-05 20:40:51,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156820410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944607206] [2021-06-05 20:40:51,275 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:40:51,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:40:51,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:40:51,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:40:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:40:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:40:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944607206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:40:51,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:40:51,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 20:40:51,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482478436] [2021-06-05 20:40:51,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 20:40:51,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:40:51,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 20:40:51,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 20:40:51,463 INFO L87 Difference]: Start difference. First operand 265452 states and 639663 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:40:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:40:54,075 INFO L93 Difference]: Finished difference Result 286685 states and 690019 transitions. [2021-06-05 20:40:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 20:40:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:40:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:40:54,550 INFO L225 Difference]: With dead ends: 286685 [2021-06-05 20:40:54,550 INFO L226 Difference]: Without dead ends: 286639 [2021-06-05 20:40:54,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 1051.7ms TimeCoverageRelationStatistics Valid=3012, Invalid=7290, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 20:40:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286639 states. [2021-06-05 20:40:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286639 to 275229. [2021-06-05 20:41:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275229 states, 275228 states have (on average 2.4106704259741014) internal successors, (663484), 275228 states have internal predecessors, (663484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275229 states to 275229 states and 663484 transitions. [2021-06-05 20:41:00,676 INFO L78 Accepts]: Start accepts. Automaton has 275229 states and 663484 transitions. Word has length 45 [2021-06-05 20:41:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:00,677 INFO L482 AbstractCegarLoop]: Abstraction has 275229 states and 663484 transitions. [2021-06-05 20:41:00,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 275229 states and 663484 transitions. [2021-06-05 20:41:00,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:41:00,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:00,892 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:01,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 20:41:01,093 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:01,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1313758001, now seen corresponding path program 203 times [2021-06-05 20:41:01,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:01,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205180731] [2021-06-05 20:41:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:01,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:01,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205180731] [2021-06-05 20:41:01,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205180731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:01,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550883844] [2021-06-05 20:41:01,150 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:01,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 20:41:01,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:01,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:41:01,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:01,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550883844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:01,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:01,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 20:41:01,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417154775] [2021-06-05 20:41:01,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:41:01,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:41:01,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:41:01,319 INFO L87 Difference]: Start difference. First operand 275229 states and 663484 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:04,888 INFO L93 Difference]: Finished difference Result 295949 states and 711071 transitions. [2021-06-05 20:41:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 20:41:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:41:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:05,372 INFO L225 Difference]: With dead ends: 295949 [2021-06-05 20:41:05,372 INFO L226 Difference]: Without dead ends: 295898 [2021-06-05 20:41:05,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4381 ImplicationChecksByTransitivity, 1292.7ms TimeCoverageRelationStatistics Valid=4162, Invalid=8948, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 20:41:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295898 states. [2021-06-05 20:41:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295898 to 264561. [2021-06-05 20:41:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264561 states, 264560 states have (on average 2.410054429996976) internal successors, (637604), 264560 states have internal predecessors, (637604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264561 states to 264561 states and 637604 transitions. [2021-06-05 20:41:11,541 INFO L78 Accepts]: Start accepts. Automaton has 264561 states and 637604 transitions. Word has length 45 [2021-06-05 20:41:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:11,541 INFO L482 AbstractCegarLoop]: Abstraction has 264561 states and 637604 transitions. [2021-06-05 20:41:11,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 264561 states and 637604 transitions. [2021-06-05 20:41:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:41:11,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:11,724 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:11,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:11,925 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:11,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1315145499, now seen corresponding path program 204 times [2021-06-05 20:41:11,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:11,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093730085] [2021-06-05 20:41:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:11,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:11,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093730085] [2021-06-05 20:41:11,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093730085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:11,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696707360] [2021-06-05 20:41:11,996 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:12,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 20:41:12,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:41:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:12,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696707360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:12,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:12,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 20:41:12,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867079199] [2021-06-05 20:41:12,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 20:41:12,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:12,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 20:41:12,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:41:12,187 INFO L87 Difference]: Start difference. First operand 264561 states and 637604 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:14,979 INFO L93 Difference]: Finished difference Result 289182 states and 695254 transitions. [2021-06-05 20:41:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 20:41:14,979 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:41:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:16,164 INFO L225 Difference]: With dead ends: 289182 [2021-06-05 20:41:16,164 INFO L226 Difference]: Without dead ends: 289110 [2021-06-05 20:41:16,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3360 ImplicationChecksByTransitivity, 1783.1ms TimeCoverageRelationStatistics Valid=2984, Invalid=7936, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 20:41:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289110 states. [2021-06-05 20:41:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289110 to 271730. [2021-06-05 20:41:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271730 states, 271729 states have (on average 2.409790636994947) internal successors, (654810), 271729 states have internal predecessors, (654810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271730 states to 271730 states and 654810 transitions. [2021-06-05 20:41:22,895 INFO L78 Accepts]: Start accepts. Automaton has 271730 states and 654810 transitions. Word has length 45 [2021-06-05 20:41:22,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:22,895 INFO L482 AbstractCegarLoop]: Abstraction has 271730 states and 654810 transitions. [2021-06-05 20:41:22,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 271730 states and 654810 transitions. [2021-06-05 20:41:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:41:23,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:23,093 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:23,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 20:41:23,293 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 278287845, now seen corresponding path program 205 times [2021-06-05 20:41:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:23,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122538483] [2021-06-05 20:41:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:23,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:23,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122538483] [2021-06-05 20:41:23,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122538483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:23,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555888994] [2021-06-05 20:41:23,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:23,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:41:23,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:23,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555888994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:23,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:23,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 20:41:23,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425604550] [2021-06-05 20:41:23,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:41:23,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:23,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:41:23,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:41:23,545 INFO L87 Difference]: Start difference. First operand 271730 states and 654810 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:26,796 INFO L93 Difference]: Finished difference Result 301771 states and 724559 transitions. [2021-06-05 20:41:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 20:41:26,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:41:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:27,325 INFO L225 Difference]: With dead ends: 301771 [2021-06-05 20:41:27,325 INFO L226 Difference]: Without dead ends: 301729 [2021-06-05 20:41:27,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6351 ImplicationChecksByTransitivity, 2119.2ms TimeCoverageRelationStatistics Valid=5299, Invalid=11731, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 20:41:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301729 states. [2021-06-05 20:41:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301729 to 267065. [2021-06-05 20:41:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267065 states, 267064 states have (on average 2.4101750891172156) internal successors, (643671), 267064 states have internal predecessors, (643671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267065 states to 267065 states and 643671 transitions. [2021-06-05 20:41:33,869 INFO L78 Accepts]: Start accepts. Automaton has 267065 states and 643671 transitions. Word has length 45 [2021-06-05 20:41:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:33,869 INFO L482 AbstractCegarLoop]: Abstraction has 267065 states and 643671 transitions. [2021-06-05 20:41:33,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 267065 states and 643671 transitions. [2021-06-05 20:41:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:41:34,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:34,049 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:34,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 20:41:34,249 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:34,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2136402195, now seen corresponding path program 206 times [2021-06-05 20:41:34,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:34,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65505663] [2021-06-05 20:41:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:34,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:34,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65505663] [2021-06-05 20:41:34,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65505663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:34,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578411532] [2021-06-05 20:41:34,323 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:34,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:41:34,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:34,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:41:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:34,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578411532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:34,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:34,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 20:41:34,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866465379] [2021-06-05 20:41:34,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 20:41:34,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 20:41:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 20:41:34,531 INFO L87 Difference]: Start difference. First operand 267065 states and 643671 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:37,275 INFO L93 Difference]: Finished difference Result 294698 states and 707244 transitions. [2021-06-05 20:41:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 20:41:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:41:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:37,811 INFO L225 Difference]: With dead ends: 294698 [2021-06-05 20:41:37,811 INFO L226 Difference]: Without dead ends: 294594 [2021-06-05 20:41:37,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 1213.0ms TimeCoverageRelationStatistics Valid=2964, Invalid=8592, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 20:41:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294594 states. [2021-06-05 20:41:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294594 to 270513. [2021-06-05 20:41:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270513 states, 270512 states have (on average 2.4090354586857514) internal successors, (651673), 270512 states have internal predecessors, (651673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270513 states to 270513 states and 651673 transitions. [2021-06-05 20:41:44,515 INFO L78 Accepts]: Start accepts. Automaton has 270513 states and 651673 transitions. Word has length 45 [2021-06-05 20:41:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:44,515 INFO L482 AbstractCegarLoop]: Abstraction has 270513 states and 651673 transitions. [2021-06-05 20:41:44,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 270513 states and 651673 transitions. [2021-06-05 20:41:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:41:44,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:44,707 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:44,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:44,907 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:44,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:44,908 INFO L82 PathProgramCache]: Analyzing trace with hash -407763697, now seen corresponding path program 207 times [2021-06-05 20:41:44,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:44,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926238708] [2021-06-05 20:41:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:44,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926238708] [2021-06-05 20:41:44,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926238708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699959379] [2021-06-05 20:41:44,952 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:44,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 20:41:44,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:44,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:41:44,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:45,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699959379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:45,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:45,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 20:41:45,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542062277] [2021-06-05 20:41:45,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:41:45,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:45,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:41:45,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:41:45,167 INFO L87 Difference]: Start difference. First operand 270513 states and 651673 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:41:48,772 INFO L93 Difference]: Finished difference Result 313779 states and 752851 transitions. [2021-06-05 20:41:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 20:41:48,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:41:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:41:49,754 INFO L225 Difference]: With dead ends: 313779 [2021-06-05 20:41:49,754 INFO L226 Difference]: Without dead ends: 313746 [2021-06-05 20:41:49,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10068 ImplicationChecksByTransitivity, 2487.8ms TimeCoverageRelationStatistics Valid=7126, Invalid=16744, Unknown=0, NotChecked=0, Total=23870 [2021-06-05 20:41:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313746 states. [2021-06-05 20:41:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313746 to 281386. [2021-06-05 20:41:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281386 states, 281385 states have (on average 2.4109920571459034) internal successors, (678417), 281385 states have internal predecessors, (678417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281386 states to 281386 states and 678417 transitions. [2021-06-05 20:41:56,127 INFO L78 Accepts]: Start accepts. Automaton has 281386 states and 678417 transitions. Word has length 45 [2021-06-05 20:41:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:41:56,127 INFO L482 AbstractCegarLoop]: Abstraction has 281386 states and 678417 transitions. [2021-06-05 20:41:56,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:41:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 281386 states and 678417 transitions. [2021-06-05 20:41:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:41:57,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:41:57,201 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:41:57,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:57,417 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:41:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:41:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1381720613, now seen corresponding path program 208 times [2021-06-05 20:41:57,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:41:57,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353093441] [2021-06-05 20:41:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:41:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:41:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:57,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:41:57,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353093441] [2021-06-05 20:41:57,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353093441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:57,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825568496] [2021-06-05 20:41:57,496 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:41:57,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:41:57,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:41:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:41:57,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:41:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:41:57,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825568496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:41:57,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:41:57,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 20:41:57,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828160337] [2021-06-05 20:41:57,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 20:41:57,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:41:57,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 20:41:57,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 20:41:57,711 INFO L87 Difference]: Start difference. First operand 281386 states and 678417 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:00,443 INFO L93 Difference]: Finished difference Result 309307 states and 742418 transitions. [2021-06-05 20:42:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 20:42:00,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:42:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:00,947 INFO L225 Difference]: With dead ends: 309307 [2021-06-05 20:42:00,948 INFO L226 Difference]: Without dead ends: 309173 [2021-06-05 20:42:00,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4218 ImplicationChecksByTransitivity, 1276.2ms TimeCoverageRelationStatistics Valid=2958, Invalid=9252, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 20:42:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309173 states. [2021-06-05 20:42:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309173 to 286334. [2021-06-05 20:42:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286334 states, 286333 states have (on average 2.4096384279842002) internal successors, (689959), 286333 states have internal predecessors, (689959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286334 states to 286334 states and 689959 transitions. [2021-06-05 20:42:08,002 INFO L78 Accepts]: Start accepts. Automaton has 286334 states and 689959 transitions. Word has length 45 [2021-06-05 20:42:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:08,002 INFO L482 AbstractCegarLoop]: Abstraction has 286334 states and 689959 transitions. [2021-06-05 20:42:08,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 286334 states and 689959 transitions. [2021-06-05 20:42:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:42:08,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:08,211 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:08,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:08,411 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:08,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1180110245, now seen corresponding path program 209 times [2021-06-05 20:42:08,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:08,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544584241] [2021-06-05 20:42:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:08,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:08,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544584241] [2021-06-05 20:42:08,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544584241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:08,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454008683] [2021-06-05 20:42:08,452 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:08,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 20:42:08,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:42:08,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:08,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454008683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:08,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:08,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-05 20:42:08,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834241809] [2021-06-05 20:42:08,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 20:42:08,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:08,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 20:42:08,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 20:42:08,638 INFO L87 Difference]: Start difference. First operand 286334 states and 689959 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:12,304 INFO L93 Difference]: Finished difference Result 349568 states and 840195 transitions. [2021-06-05 20:42:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 20:42:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:42:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:13,318 INFO L225 Difference]: With dead ends: 349568 [2021-06-05 20:42:13,318 INFO L226 Difference]: Without dead ends: 349538 [2021-06-05 20:42:13,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11004 ImplicationChecksByTransitivity, 2440.8ms TimeCoverageRelationStatistics Valid=6782, Invalid=16474, Unknown=0, NotChecked=0, Total=23256 [2021-06-05 20:42:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349538 states. [2021-06-05 20:42:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349538 to 316219. [2021-06-05 20:42:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316219 states, 316218 states have (on average 2.41152938795388) internal successors, (762569), 316218 states have internal predecessors, (762569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316219 states to 316219 states and 762569 transitions. [2021-06-05 20:42:20,580 INFO L78 Accepts]: Start accepts. Automaton has 316219 states and 762569 transitions. Word has length 45 [2021-06-05 20:42:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:42:20,580 INFO L482 AbstractCegarLoop]: Abstraction has 316219 states and 762569 transitions. [2021-06-05 20:42:20,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 316219 states and 762569 transitions. [2021-06-05 20:42:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 20:42:20,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:42:20,792 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:42:20,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 20:42:20,993 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:42:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:42:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1635989849, now seen corresponding path program 210 times [2021-06-05 20:42:20,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:42:20,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466936139] [2021-06-05 20:42:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:42:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:42:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:21,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:42:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466936139] [2021-06-05 20:42:21,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466936139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239717340] [2021-06-05 20:42:21,066 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:21,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 20:42:21,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:42:21,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:42:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:42:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:42:21,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239717340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:42:21,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:42:21,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 20:42:21,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842426669] [2021-06-05 20:42:21,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 20:42:21,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:42:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 20:42:21,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 20:42:21,218 INFO L87 Difference]: Start difference. First operand 316219 states and 762569 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:42:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:42:23,648 INFO L93 Difference]: Finished difference Result 343652 states and 828304 transitions. [2021-06-05 20:42:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 20:42:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 20:42:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:42:24,464 INFO L225 Difference]: With dead ends: 343652 [2021-06-05 20:42:24,464 INFO L226 Difference]: Without dead ends: 343652 [2021-06-05 20:42:24,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=350, Invalid=840, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:42:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343652 states. Received shutdown request... [2021-06-05 20:42:27,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:42:27,374 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 20:42:27,376 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 20:42:27,377 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 20:42:27,378 INFO L202 PluginConnector]: Adding new model concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 08:42:27 BasicIcfg [2021-06-05 20:42:27,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 20:42:27,378 INFO L168 Benchmark]: Toolchain (without parser) took 705015.08 ms. Allocated memory was 337.6 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 317.8 MB in the beginning and 13.8 GB in the end (delta: -13.5 GB). Peak memory consumption was 8.3 GB. Max. memory is 16.0 GB. [2021-06-05 20:42:27,378 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 337.6 MB. Free memory was 318.8 MB in the beginning and 318.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:42:27,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.00 ms. Allocated memory is still 337.6 MB. Free memory was 317.7 MB in the beginning and 316.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 20:42:27,378 INFO L168 Benchmark]: Boogie Preprocessor took 14.70 ms. Allocated memory is still 337.6 MB. Free memory was 316.2 MB in the beginning and 315.3 MB in the end (delta: 953.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:42:27,378 INFO L168 Benchmark]: RCFGBuilder took 223.16 ms. Allocated memory is still 337.6 MB. Free memory was 315.2 MB in the beginning and 305.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 20:42:27,378 INFO L168 Benchmark]: TraceAbstraction took 704751.40 ms. Allocated memory was 337.6 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 304.8 MB in the beginning and 13.8 GB in the end (delta: -13.5 GB). Peak memory consumption was 8.3 GB. Max. memory is 16.0 GB. [2021-06-05 20:42:27,380 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 337.6 MB. Free memory was 318.8 MB in the beginning and 318.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.00 ms. Allocated memory is still 337.6 MB. Free memory was 317.7 MB in the beginning and 316.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.70 ms. Allocated memory is still 337.6 MB. Free memory was 316.2 MB in the beginning and 315.3 MB in the end (delta: 953.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 223.16 ms. Allocated memory is still 337.6 MB. Free memory was 315.2 MB in the beginning and 305.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 704751.40 ms. Allocated memory was 337.6 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 304.8 MB in the beginning and 13.8 GB in the end (delta: -13.5 GB). Peak memory consumption was 8.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 35 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 704659.5ms, OverallIterations: 223, TraceHistogramMax: 6, EmptinessCheckTime: 17596.5ms, AutomataDifference: 249346.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11109 SDtfs, 43440 SDslu, 64328 SDs, 0 SdLazy, 78787 SolverSat, 8135 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37298.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17043 GetRequests, 6331 SyntacticMatches, 52 SemanticMatches, 10660 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235717 ImplicationChecksByTransitivity, 113746.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=316219occurred in iteration=222, InterpolantAutomatonStates: 9768, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 351661.1ms AutomataMinimizationTime, 223 MinimizatonAttempts, 2643359 StatesRemovedByMinimization, 222 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 577.4ms SsaConstructionTime, 1885.5ms SatisfiabilityAnalysisTime, 35107.9ms InterpolantComputationTime, 14532 NumberOfCodeBlocks, 14532 NumberOfCodeBlocksAsserted, 987 NumberOfCheckSat, 14095 ConstructedInterpolants, 0 QuantifiedInterpolants, 58539 SizeOfPredicates, 582 NumberOfNonLiveVariables, 13070 ConjunctsInSsa, 2326 ConjunctsInUnsatCore, 437 InterpolantComputations, 9 PerfectInterpolantSequences, 7204/17502 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown