/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:41:44,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:41:44,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:41:44,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:41:44,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:41:44,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:41:44,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:41:44,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:41:44,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:41:44,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:41:44,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:41:44,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:41:44,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:41:44,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:41:44,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:41:44,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:41:44,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:41:44,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:41:44,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:41:44,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:41:44,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:41:44,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:41:44,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:41:44,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:41:44,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:41:44,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:41:44,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:41:44,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:41:44,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:41:44,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:41:44,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:41:44,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:41:44,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:41:44,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:41:44,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:41:44,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:41:44,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:41:44,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:41:44,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:41:44,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:41:44,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:41:44,420 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-SemanticLbe.epf [2020-04-17 18:41:44,439 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:41:44,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:41:44,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:41:44,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:41:44,441 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:41:44,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:41:44,442 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:41:44,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:41:44,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:41:44,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:41:44,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:41:44,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:41:44,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:41:44,445 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:41:44,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:41:44,446 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:41:44,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:41:44,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:41:44,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:41:44,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:41:44,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:41:44,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:41:44,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:41:44,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:41:44,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:41:44,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:41:44,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:41:44,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:41:44,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:41:44,769 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:41:44,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:41:44,794 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:41:44,795 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:41:44,796 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:41:44,796 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-04-17 18:41:44,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643a04e67/5541709da61d4f94a0f9d855795b9562/FLAG1c770ddd1 [2020-04-17 18:41:45,479 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:41:45,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-04-17 18:41:45,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643a04e67/5541709da61d4f94a0f9d855795b9562/FLAG1c770ddd1 [2020-04-17 18:41:45,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643a04e67/5541709da61d4f94a0f9d855795b9562 [2020-04-17 18:41:45,743 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:41:45,766 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:41:45,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:41:45,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:41:45,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:41:45,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:41:45" (1/1) ... [2020-04-17 18:41:45,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a51e485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:45, skipping insertion in model container [2020-04-17 18:41:45,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:41:45" (1/1) ... [2020-04-17 18:41:45,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:41:45,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:41:46,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:41:46,302 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:41:46,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:41:46,439 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:41:46,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46 WrapperNode [2020-04-17 18:41:46,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:41:46,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:41:46,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:41:46,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:41:46,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:41:46,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:41:46,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:41:46,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:41:46,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:41:46,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:41:46,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:41:46,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:41:46,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (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 [2020-04-17 18:41:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 18:41:46,579 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 18:41:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 18:41:46,579 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 18:41:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:41:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 18:41:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:41:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:41:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 18:41:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:41:46,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:41:46,582 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:41:46,954 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:41:46,954 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 18:41:46,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:41:46 BoogieIcfgContainer [2020-04-17 18:41:46,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:41:46,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:41:46,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:41:46,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:41:46,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:41:45" (1/3) ... [2020-04-17 18:41:46,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2ac1d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:41:46, skipping insertion in model container [2020-04-17 18:41:46,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (2/3) ... [2020-04-17 18:41:46,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2ac1d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:41:46, skipping insertion in model container [2020-04-17 18:41:46,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:41:46" (3/3) ... [2020-04-17 18:41:46,970 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-04-17 18:41:46,981 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:41:46,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:41:46,988 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:41:46,989 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:41:47,012 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,013 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,013 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,014 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,014 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,014 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,015 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,015 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,015 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,016 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,016 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,016 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,017 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,017 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,017 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,018 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,018 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,018 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,018 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,019 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,019 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,019 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,020 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,020 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,020 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,021 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,021 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,021 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,022 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,022 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,026 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,027 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,027 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,028 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,028 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,028 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,044 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,044 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,045 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,045 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,045 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,046 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,063 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 18:41:47,085 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:41:47,086 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:41:47,086 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:41:47,086 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:41:47,086 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:41:47,086 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:41:47,087 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:41:47,087 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:41:47,103 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,105 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,146 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 18:41:47,146 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:41:47,152 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 18:41:47,155 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,174 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 18:41:47,174 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:41:47,175 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 18:41:47,177 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-17 18:41:47,179 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:41:48,523 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-17 18:41:48,678 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-04-17 18:41:48,678 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-04-17 18:41:48,682 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 18:41:48,705 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 18:41:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 18:41:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 18:41:48,713 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:48,714 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 18:41:48,714 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:48,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-04-17 18:41:48,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:48,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607142006] [2020-04-17 18:41:48,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:48,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607142006] [2020-04-17 18:41:48,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:48,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:41:48,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96837271] [2020-04-17 18:41:48,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:41:48,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:41:49,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:41:49,018 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 18:41:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,109 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-17 18:41:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:41:49,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 18:41:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,132 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:41:49,132 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:41:49,134 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:41:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-17 18:41:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:41:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-17 18:41:49,180 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-17 18:41:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,180 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-17 18:41:49,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:41:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-17 18:41:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,182 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,182 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,183 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-04-17 18:41:49,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221314926] [2020-04-17 18:41:49,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221314926] [2020-04-17 18:41:49,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330851292] [2020-04-17 18:41:49,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,327 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-04-17 18:41:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,399 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-17 18:41:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:49,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,402 INFO L225 Difference]: With dead ends: 80 [2020-04-17 18:41:49,402 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 18:41:49,403 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 18:41:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-17 18:41:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:41:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-17 18:41:49,414 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-17 18:41:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,418 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-17 18:41:49,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-17 18:41:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,421 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,421 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,422 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,423 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-04-17 18:41:49,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251548650] [2020-04-17 18:41:49,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251548650] [2020-04-17 18:41:49,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203668014] [2020-04-17 18:41:49,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,545 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-04-17 18:41:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,588 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-04-17 18:41:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:41:49,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,590 INFO L225 Difference]: With dead ends: 73 [2020-04-17 18:41:49,591 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 18:41:49,592 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 18:41:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-04-17 18:41:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:41:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-04-17 18:41:49,608 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-04-17 18:41:49,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,609 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-04-17 18:41:49,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-04-17 18:41:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,610 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,613 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,613 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,614 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-04-17 18:41:49,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973174307] [2020-04-17 18:41:49,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973174307] [2020-04-17 18:41:49,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762302345] [2020-04-17 18:41:49,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,707 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-04-17 18:41:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,803 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-04-17 18:41:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:49,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,805 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:41:49,806 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 18:41:49,806 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 18:41:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-04-17 18:41:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:41:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-17 18:41:49,827 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-17 18:41:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,827 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-17 18:41:49,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-17 18:41:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:49,830 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,830 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,830 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,830 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-04-17 18:41:49,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118610930] [2020-04-17 18:41:49,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118610930] [2020-04-17 18:41:49,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703335929] [2020-04-17 18:41:49,933 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:50,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:50,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:50,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:50,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:50,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-17 18:41:50,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048346872] [2020-04-17 18:41:50,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:41:50,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:50,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:41:50,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:41:50,109 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-04-17 18:41:50,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:50,220 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-17 18:41:50,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:50,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-04-17 18:41:50,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:50,222 INFO L225 Difference]: With dead ends: 101 [2020-04-17 18:41:50,223 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 18:41:50,223 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 18:41:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-17 18:41:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 18:41:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-17 18:41:50,240 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-17 18:41:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:50,240 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-17 18:41:50,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:41:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-17 18:41:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:50,244 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:50,244 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:50,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,446 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-04-17 18:41:50,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:50,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59108701] [2020-04-17 18:41:50,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59108701] [2020-04-17 18:41:50,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393656541] [2020-04-17 18:41:50,565 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:50,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:50,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:50,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:50,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:50,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526069115] [2020-04-17 18:41:50,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:50,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:50,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:50,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,689 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-04-17 18:41:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:50,721 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 18:41:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:41:50,721 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:50,723 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:41:50,723 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 18:41:50,723 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 18:41:50,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-04-17 18:41:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:41:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-04-17 18:41:50,731 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-04-17 18:41:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:50,731 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-04-17 18:41:50,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-04-17 18:41:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:50,733 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:50,733 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:50,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,936 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:50,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-04-17 18:41:50,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:50,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809096203] [2020-04-17 18:41:50,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809096203] [2020-04-17 18:41:51,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651882109] [2020-04-17 18:41:51,026 INFO L92 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 [2020-04-17 18:41:51,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:41:51,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:51,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:51,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:51,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:51,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294334862] [2020-04-17 18:41:51,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:51,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:51,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:51,134 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-04-17 18:41:51,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,206 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-04-17 18:41:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:51,207 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:51,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,208 INFO L225 Difference]: With dead ends: 90 [2020-04-17 18:41:51,208 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 18:41:51,209 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:41:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 18:41:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-04-17 18:41:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 18:41:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-04-17 18:41:51,216 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-04-17 18:41:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,216 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-04-17 18:41:51,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-04-17 18:41:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:51,218 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,218 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,426 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-04-17 18:41:51,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734457107] [2020-04-17 18:41:51,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734457107] [2020-04-17 18:41:51,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123098474] [2020-04-17 18:41:51,498 INFO L92 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 [2020-04-17 18:41:51,557 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:51,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:51,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:51,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:51,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:51,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:51,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001174431] [2020-04-17 18:41:51,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:51,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:51,630 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-04-17 18:41:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,747 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 18:41:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:51,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,749 INFO L225 Difference]: With dead ends: 99 [2020-04-17 18:41:51,749 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 18:41:51,749 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 18:41:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-04-17 18:41:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 18:41:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-04-17 18:41:51,756 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-04-17 18:41:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,756 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-04-17 18:41:51,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-04-17 18:41:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:51,758 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,758 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,959 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,959 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-04-17 18:41:51,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690822824] [2020-04-17 18:41:51,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690822824] [2020-04-17 18:41:52,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261220709] [2020-04-17 18:41:52,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,040 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-04-17 18:41:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,085 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-04-17 18:41:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:41:52,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,087 INFO L225 Difference]: With dead ends: 92 [2020-04-17 18:41:52,087 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:41:52,088 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:41:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-04-17 18:41:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 18:41:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-04-17 18:41:52,094 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-04-17 18:41:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,094 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-04-17 18:41:52,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-04-17 18:41:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,096 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,096 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,096 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,096 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-04-17 18:41:52,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329637047] [2020-04-17 18:41:52,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329637047] [2020-04-17 18:41:52,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740143252] [2020-04-17 18:41:52,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,160 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-04-17 18:41:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,208 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-04-17 18:41:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:52,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,210 INFO L225 Difference]: With dead ends: 100 [2020-04-17 18:41:52,210 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:41:52,210 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:41:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-04-17 18:41:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 18:41:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-04-17 18:41:52,216 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-04-17 18:41:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,216 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-04-17 18:41:52,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-04-17 18:41:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,217 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,218 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,218 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-04-17 18:41:52,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874648959] [2020-04-17 18:41:52,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874648959] [2020-04-17 18:41:52,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573850718] [2020-04-17 18:41:52,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,271 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-04-17 18:41:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,353 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 18:41:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:52,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,356 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:41:52,356 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:41:52,357 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:41:52,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 18:41:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:41:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-04-17 18:41:52,361 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-04-17 18:41:52,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,362 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-04-17 18:41:52,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,362 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-04-17 18:41:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,363 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,363 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,363 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,363 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-04-17 18:41:52,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207278482] [2020-04-17 18:41:52,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207278482] [2020-04-17 18:41:52,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744891368] [2020-04-17 18:41:52,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,416 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-04-17 18:41:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,493 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 18:41:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:52,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,495 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:41:52,495 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:41:52,495 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:41:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 18:41:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:41:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-04-17 18:41:52,500 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-04-17 18:41:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,501 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-04-17 18:41:52,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-04-17 18:41:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,502 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,502 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,502 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-04-17 18:41:52,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420555786] [2020-04-17 18:41:52,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420555786] [2020-04-17 18:41:52,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730323810] [2020-04-17 18:41:52,578 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:52,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:52,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:52,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:52,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:52,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:52,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 18:41:52,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000425264] [2020-04-17 18:41:52,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:41:52,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:41:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:52,749 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-04-17 18:41:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,868 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-04-17 18:41:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:52,868 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-04-17 18:41:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,870 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:41:52,870 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:41:52,870 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:41:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:41:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-04-17 18:41:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 18:41:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-04-17 18:41:52,875 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-04-17 18:41:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,875 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-04-17 18:41:52,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:41:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-04-17 18:41:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,876 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,876 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:53,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,080 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:53,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-04-17 18:41:53,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:53,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295963966] [2020-04-17 18:41:53,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295963966] [2020-04-17 18:41:53,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039849550] [2020-04-17 18:41:53,169 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:41:53,244 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:53,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:53,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:53,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:53,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:53,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532128744] [2020-04-17 18:41:53,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:53,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:53,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:53,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,382 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-04-17 18:41:53,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:53,427 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 18:41:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:53,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:53,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:53,429 INFO L225 Difference]: With dead ends: 108 [2020-04-17 18:41:53,429 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 18:41:53,430 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 18:41:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-04-17 18:41:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 18:41:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-04-17 18:41:53,435 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-04-17 18:41:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:53,436 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-04-17 18:41:53,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-04-17 18:41:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:53,436 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:53,437 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:53,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,649 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:53,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-04-17 18:41:53,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:53,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103366994] [2020-04-17 18:41:53,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103366994] [2020-04-17 18:41:53,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011260568] [2020-04-17 18:41:53,725 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:53,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:53,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:53,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922410751] [2020-04-17 18:41:53,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:53,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:53,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:53,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,866 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-04-17 18:41:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:53,931 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-04-17 18:41:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:53,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:53,937 INFO L225 Difference]: With dead ends: 116 [2020-04-17 18:41:53,937 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 18:41:53,938 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:53,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 18:41:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-04-17 18:41:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:41:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-04-17 18:41:53,947 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-04-17 18:41:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:53,948 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-04-17 18:41:53,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-04-17 18:41:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:53,949 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:53,949 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:54,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,154 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-04-17 18:41:54,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:54,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049346188] [2020-04-17 18:41:54,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049346188] [2020-04-17 18:41:54,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290047595] [2020-04-17 18:41:54,223 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:41:54,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:54,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:54,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:54,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:54,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:54,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89028466] [2020-04-17 18:41:54,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:54,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:54,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:54,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:54,348 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-04-17 18:41:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:54,427 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-04-17 18:41:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:54,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:54,429 INFO L225 Difference]: With dead ends: 115 [2020-04-17 18:41:54,429 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 18:41:54,430 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 18:41:54,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-04-17 18:41:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:41:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-04-17 18:41:54,434 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-04-17 18:41:54,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:54,434 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-04-17 18:41:54,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-04-17 18:41:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:54,435 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:54,435 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:54,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,639 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:54,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-04-17 18:41:54,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:54,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82911331] [2020-04-17 18:41:54,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82911331] [2020-04-17 18:41:54,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876351966] [2020-04-17 18:41:54,709 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:54,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:54,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:54,766 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:54,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:54,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:54,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764509100] [2020-04-17 18:41:54,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:54,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:54,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:54,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:54,836 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-04-17 18:41:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:54,971 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-04-17 18:41:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:54,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:54,972 INFO L225 Difference]: With dead ends: 124 [2020-04-17 18:41:54,973 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 18:41:54,973 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:41:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 18:41:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-04-17 18:41:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:41:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-04-17 18:41:54,977 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-04-17 18:41:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:54,978 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-04-17 18:41:54,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-04-17 18:41:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:54,978 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:54,978 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:55,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,185 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:55,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-04-17 18:41:55,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:55,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044009828] [2020-04-17 18:41:55,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044009828] [2020-04-17 18:41:55,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264855179] [2020-04-17 18:41:55,256 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:41:55,304 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:55,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:55,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:55,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:55,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:55,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918825603] [2020-04-17 18:41:55,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:55,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:55,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:55,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,402 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-04-17 18:41:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:55,442 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-04-17 18:41:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:55,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:55,445 INFO L225 Difference]: With dead ends: 113 [2020-04-17 18:41:55,445 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 18:41:55,445 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 18:41:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-04-17 18:41:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 18:41:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-04-17 18:41:55,449 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-04-17 18:41:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:55,450 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-04-17 18:41:55,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-04-17 18:41:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:55,450 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:55,450 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:55,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,655 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:55,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:55,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-04-17 18:41:55,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:55,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966494232] [2020-04-17 18:41:55,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966494232] [2020-04-17 18:41:55,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141064605] [2020-04-17 18:41:55,731 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:41:55,780 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:55,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:55,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:55,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:55,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:55,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404535531] [2020-04-17 18:41:55,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:55,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:55,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:55,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,862 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-04-17 18:41:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:55,941 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-04-17 18:41:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:55,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:55,942 INFO L225 Difference]: With dead ends: 118 [2020-04-17 18:41:55,942 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 18:41:55,943 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 18:41:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-04-17 18:41:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 18:41:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-04-17 18:41:55,947 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-04-17 18:41:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:55,947 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-04-17 18:41:55,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-04-17 18:41:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:55,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:55,948 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:56,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,152 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:56,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-04-17 18:41:56,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:56,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420807484] [2020-04-17 18:41:56,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420807484] [2020-04-17 18:41:56,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845379315] [2020-04-17 18:41:56,243 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:41:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:56,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:56,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:56,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55831854] [2020-04-17 18:41:56,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:56,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:56,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:56,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:56,375 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-04-17 18:41:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:56,453 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-04-17 18:41:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:56,454 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:56,455 INFO L225 Difference]: With dead ends: 119 [2020-04-17 18:41:56,455 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:41:56,455 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:41:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 18:41:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 18:41:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-04-17 18:41:56,459 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-04-17 18:41:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:56,459 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-04-17 18:41:56,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-04-17 18:41:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:56,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:56,460 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:56,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,666 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:56,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-04-17 18:41:56,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:56,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606114530] [2020-04-17 18:41:56,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606114530] [2020-04-17 18:41:56,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513116038] [2020-04-17 18:41:56,755 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:41:56,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:56,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:56,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:56,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:56,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:56,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002163302] [2020-04-17 18:41:56,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:56,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:56,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:56,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:56,948 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-04-17 18:41:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:57,022 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-04-17 18:41:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:57,022 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:57,023 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:41:57,023 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 18:41:57,023 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 18:41:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-04-17 18:41:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 18:41:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-04-17 18:41:57,029 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-04-17 18:41:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:57,029 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-04-17 18:41:57,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-04-17 18:41:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:57,030 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:57,030 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:57,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,241 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:57,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-04-17 18:41:57,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:57,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999283140] [2020-04-17 18:41:57,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999283140] [2020-04-17 18:41:57,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020665626] [2020-04-17 18:41:57,318 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:41:57,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:57,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:57,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:57,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:57,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:57,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795017123] [2020-04-17 18:41:57,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:57,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:57,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:57,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:57,443 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-04-17 18:41:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:57,550 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-04-17 18:41:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:41:57,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:57,551 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:41:57,551 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:41:57,552 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:41:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:41:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-04-17 18:41:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:41:57,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-04-17 18:41:57,556 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-04-17 18:41:57,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:57,556 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-04-17 18:41:57,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-04-17 18:41:57,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:57,557 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:57,557 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:57,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,758 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:57,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:57,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-04-17 18:41:57,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:57,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579289445] [2020-04-17 18:41:57,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579289445] [2020-04-17 18:41:57,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440409208] [2020-04-17 18:41:57,826 INFO L92 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 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 [2020-04-17 18:41:57,870 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:41:57,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:57,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:57,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:57,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:57,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550353626] [2020-04-17 18:41:57,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:57,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:57,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:57,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:57,940 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-04-17 18:41:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:58,029 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 18:41:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:58,030 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:58,031 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:41:58,031 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:41:58,032 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:41:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-04-17 18:41:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-04-17 18:41:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-04-17 18:41:58,036 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-04-17 18:41:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:58,036 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-04-17 18:41:58,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-04-17 18:41:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:58,037 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:58,037 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:58,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,242 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:58,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-04-17 18:41:58,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:58,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30435507] [2020-04-17 18:41:58,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30435507] [2020-04-17 18:41:58,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011728232] [2020-04-17 18:41:58,311 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:41:58,357 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:58,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:58,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:58,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:58,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:58,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:58,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464635973] [2020-04-17 18:41:58,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:58,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:58,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:58,432 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-04-17 18:41:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:58,643 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-04-17 18:41:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:58,644 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:58,645 INFO L225 Difference]: With dead ends: 133 [2020-04-17 18:41:58,647 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:41:58,647 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:41:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:41:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-04-17 18:41:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 18:41:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-04-17 18:41:58,652 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-04-17 18:41:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:58,652 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-04-17 18:41:58,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-04-17 18:41:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:58,653 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:58,654 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:58,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,858 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:58,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:58,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-04-17 18:41:58,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:58,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666804701] [2020-04-17 18:41:58,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666804701] [2020-04-17 18:41:58,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182887172] [2020-04-17 18:41:58,915 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:41:58,974 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:58,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:58,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:58,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:59,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:59,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749922903] [2020-04-17 18:41:59,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:59,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:59,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:59,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:59,052 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-04-17 18:41:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:59,173 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-04-17 18:41:59,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:41:59,174 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:59,175 INFO L225 Difference]: With dead ends: 127 [2020-04-17 18:41:59,176 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 18:41:59,176 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:41:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 18:41:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-04-17 18:41:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 18:41:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 18:41:59,181 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 18:41:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:59,181 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 18:41:59,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 18:41:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:59,182 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:59,182 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:59,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,386 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:59,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-04-17 18:41:59,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:59,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213089110] [2020-04-17 18:41:59,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213089110] [2020-04-17 18:41:59,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428071122] [2020-04-17 18:41:59,445 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:41:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:59,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:59,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:59,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:59,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800499572] [2020-04-17 18:41:59,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:59,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:59,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:59,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:59,560 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 18:41:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:59,808 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-04-17 18:41:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:41:59,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:59,809 INFO L225 Difference]: With dead ends: 141 [2020-04-17 18:41:59,809 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 18:41:59,810 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:41:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 18:41:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-04-17 18:41:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 18:41:59,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 18:41:59,814 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 18:41:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:59,815 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 18:41:59,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:59,815 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 18:41:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:59,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:59,816 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:00,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,020 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-04-17 18:42:00,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:00,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139710500] [2020-04-17 18:42:00,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139710500] [2020-04-17 18:42:00,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768646369] [2020-04-17 18:42:00,080 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:00,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:00,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:00,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:00,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:00,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:00,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:00,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394651156] [2020-04-17 18:42:00,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:00,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:00,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:00,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:00,210 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 18:42:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:00,391 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-04-17 18:42:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:00,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:00,393 INFO L225 Difference]: With dead ends: 136 [2020-04-17 18:42:00,394 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 18:42:00,394 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 18:42:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-04-17 18:42:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-04-17 18:42:00,398 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-04-17 18:42:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:00,399 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-04-17 18:42:00,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-04-17 18:42:00,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:00,399 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:00,400 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:00,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,603 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:00,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-04-17 18:42:00,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:00,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749897282] [2020-04-17 18:42:00,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749897282] [2020-04-17 18:42:00,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143353834] [2020-04-17 18:42:00,671 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:00,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:00,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:00,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:00,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:00,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343292574] [2020-04-17 18:42:00,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:00,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:00,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:00,795 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-04-17 18:42:00,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:00,908 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-04-17 18:42:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:00,909 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:00,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:00,910 INFO L225 Difference]: With dead ends: 130 [2020-04-17 18:42:00,910 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:42:00,911 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:42:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-04-17 18:42:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:42:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 18:42:00,918 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 18:42:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:00,918 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 18:42:00,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 18:42:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:00,919 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:00,919 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:01,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,124 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-04-17 18:42:01,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:01,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045031949] [2020-04-17 18:42:01,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045031949] [2020-04-17 18:42:01,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611978383] [2020-04-17 18:42:01,210 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,256 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:01,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:01,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:01,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:01,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:01,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632340603] [2020-04-17 18:42:01,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:01,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:01,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:01,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:01,339 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 18:42:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:01,480 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-04-17 18:42:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:01,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:01,481 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:42:01,481 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 18:42:01,481 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 18:42:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-04-17 18:42:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 18:42:01,485 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 18:42:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:01,485 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 18:42:01,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 18:42:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:01,486 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:01,486 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:01,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,686 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:01,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:01,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-04-17 18:42:01,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:01,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208793331] [2020-04-17 18:42:01,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208793331] [2020-04-17 18:42:01,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618180534] [2020-04-17 18:42:01,744 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,787 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:01,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:01,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:01,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:01,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:01,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:01,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294307826] [2020-04-17 18:42:01,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:01,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:01,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:01,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:01,847 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 18:42:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:01,983 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-04-17 18:42:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:01,983 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:01,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:01,985 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:42:01,985 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 18:42:01,985 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 18:42:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-04-17 18:42:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 18:42:01,989 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 18:42:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:01,990 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 18:42:01,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:01,990 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 18:42:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:01,991 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:01,991 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:02,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,195 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:02,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-04-17 18:42:02,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:02,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733163411] [2020-04-17 18:42:02,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733163411] [2020-04-17 18:42:02,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342016196] [2020-04-17 18:42:02,254 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,298 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:02,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:02,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:02,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:02,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:02,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:02,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636530516] [2020-04-17 18:42:02,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:02,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:02,360 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 18:42:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:02,598 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-04-17 18:42:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:02,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:02,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:02,600 INFO L225 Difference]: With dead ends: 145 [2020-04-17 18:42:02,600 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 18:42:02,601 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:02,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 18:42:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-04-17 18:42:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:42:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 18:42:02,604 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 18:42:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:02,605 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 18:42:02,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 18:42:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:02,605 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:02,606 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:02,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,809 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-04-17 18:42:02,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:02,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584785027] [2020-04-17 18:42:02,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584785027] [2020-04-17 18:42:02,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485272396] [2020-04-17 18:42:02,865 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:02,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:02,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:02,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:02,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:02,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7909837] [2020-04-17 18:42:02,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:02,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:02,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:02,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:02,969 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 18:42:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:03,142 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-04-17 18:42:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:03,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:03,144 INFO L225 Difference]: With dead ends: 135 [2020-04-17 18:42:03,144 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 18:42:03,145 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 18:42:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-04-17 18:42:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 18:42:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-04-17 18:42:03,148 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-04-17 18:42:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:03,149 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-04-17 18:42:03,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-04-17 18:42:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:03,149 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:03,149 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:03,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,353 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:03,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-04-17 18:42:03,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:03,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433929921] [2020-04-17 18:42:03,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433929921] [2020-04-17 18:42:03,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621698152] [2020-04-17 18:42:03,416 INFO L92 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 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 [2020-04-17 18:42:03,458 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:03,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:03,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:03,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:03,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:03,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 18:42:03,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236296646] [2020-04-17 18:42:03,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:42:03,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:03,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:42:03,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:03,552 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-04-17 18:42:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:03,699 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-04-17 18:42:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:03,700 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-04-17 18:42:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:03,701 INFO L225 Difference]: With dead ends: 143 [2020-04-17 18:42:03,701 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:42:03,702 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:42:03,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-04-17 18:42:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-04-17 18:42:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-04-17 18:42:03,706 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-04-17 18:42:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:03,706 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-04-17 18:42:03,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:42:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-04-17 18:42:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:03,707 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:03,707 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:03,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,910 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:03,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:03,911 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-04-17 18:42:03,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:03,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788059877] [2020-04-17 18:42:03,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788059877] [2020-04-17 18:42:04,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282758152] [2020-04-17 18:42:04,010 INFO L92 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 [2020-04-17 18:42:04,056 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:04,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:04,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:04,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:04,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:04,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492401904] [2020-04-17 18:42:04,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:04,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,152 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-04-17 18:42:04,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:04,196 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-04-17 18:42:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:42:04,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:04,198 INFO L225 Difference]: With dead ends: 132 [2020-04-17 18:42:04,198 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 18:42:04,198 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 18:42:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-04-17 18:42:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 18:42:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 18:42:04,203 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 18:42:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:04,203 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 18:42:04,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 18:42:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:04,204 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:04,204 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:04,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,407 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:04,408 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-04-17 18:42:04,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:04,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706441753] [2020-04-17 18:42:04,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706441753] [2020-04-17 18:42:04,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700244616] [2020-04-17 18:42:04,488 INFO L92 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 [2020-04-17 18:42:04,558 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:04,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:04,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:04,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:04,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:04,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558595234] [2020-04-17 18:42:04,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:04,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:04,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,645 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 18:42:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:04,710 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-04-17 18:42:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:04,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:04,712 INFO L225 Difference]: With dead ends: 143 [2020-04-17 18:42:04,712 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 18:42:04,712 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 18:42:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-04-17 18:42:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 18:42:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 18:42:04,715 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 18:42:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:04,715 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 18:42:04,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 18:42:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:04,719 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:04,719 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:04,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,922 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:04,923 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-04-17 18:42:04,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:04,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738457067] [2020-04-17 18:42:04,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738457067] [2020-04-17 18:42:05,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046122110] [2020-04-17 18:42:05,001 INFO L92 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 [2020-04-17 18:42:05,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:05,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:05,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:05,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:05,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:05,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306868727] [2020-04-17 18:42:05,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:05,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:05,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:05,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:05,133 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 18:42:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:05,216 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-04-17 18:42:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:05,216 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:05,218 INFO L225 Difference]: With dead ends: 142 [2020-04-17 18:42:05,218 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 18:42:05,218 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 18:42:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-04-17 18:42:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-04-17 18:42:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-04-17 18:42:05,223 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-04-17 18:42:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:05,224 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-04-17 18:42:05,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-04-17 18:42:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:05,224 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:05,225 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:05,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,428 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-04-17 18:42:05,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:05,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282482209] [2020-04-17 18:42:05,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282482209] [2020-04-17 18:42:05,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420458123] [2020-04-17 18:42:05,548 INFO L92 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 [2020-04-17 18:42:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:05,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:05,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:05,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010317830] [2020-04-17 18:42:05,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:05,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:05,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:05,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:05,698 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-04-17 18:42:05,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:05,796 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-04-17 18:42:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:05,796 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:05,797 INFO L225 Difference]: With dead ends: 141 [2020-04-17 18:42:05,797 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:42:05,798 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:42:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-04-17 18:42:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 18:42:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-04-17 18:42:05,800 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-04-17 18:42:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:05,800 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-04-17 18:42:05,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-04-17 18:42:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:05,801 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:05,801 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:06,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,002 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:06,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:06,002 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-04-17 18:42:06,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:06,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186056030] [2020-04-17 18:42:06,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186056030] [2020-04-17 18:42:06,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139795783] [2020-04-17 18:42:06,063 INFO L92 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 [2020-04-17 18:42:06,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:06,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:06,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:06,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:06,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:06,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:06,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603379962] [2020-04-17 18:42:06,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:06,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:06,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:06,188 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-04-17 18:42:06,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:06,351 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 18:42:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:06,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:06,354 INFO L225 Difference]: With dead ends: 150 [2020-04-17 18:42:06,354 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 18:42:06,355 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 18:42:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-04-17 18:42:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-04-17 18:42:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-04-17 18:42:06,358 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-04-17 18:42:06,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:06,359 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-04-17 18:42:06,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-04-17 18:42:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:06,359 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:06,360 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:06,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,563 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-04-17 18:42:06,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:06,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478656986] [2020-04-17 18:42:06,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478656986] [2020-04-17 18:42:06,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072455472] [2020-04-17 18:42:06,643 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:06,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:06,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:06,699 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:06,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:06,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:06,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487881052] [2020-04-17 18:42:06,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:06,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:06,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:06,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:06,835 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-04-17 18:42:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:06,904 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-04-17 18:42:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:42:06,905 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:06,906 INFO L225 Difference]: With dead ends: 138 [2020-04-17 18:42:06,906 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 18:42:06,907 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 18:42:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-04-17 18:42:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 18:42:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-04-17 18:42:06,911 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-04-17 18:42:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:06,912 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-04-17 18:42:06,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-04-17 18:42:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:06,913 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:06,913 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:07,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,114 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-04-17 18:42:07,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:07,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151322640] [2020-04-17 18:42:07,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151322640] [2020-04-17 18:42:07,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868960764] [2020-04-17 18:42:07,210 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:42:07,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:07,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:07,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:07,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:07,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:07,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054812248] [2020-04-17 18:42:07,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:07,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:07,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:07,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:07,363 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-04-17 18:42:07,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:07,472 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-04-17 18:42:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:07,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:07,474 INFO L225 Difference]: With dead ends: 145 [2020-04-17 18:42:07,474 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 18:42:07,475 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 18:42:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-04-17 18:42:07,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-04-17 18:42:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-04-17 18:42:07,479 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-04-17 18:42:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:07,479 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-04-17 18:42:07,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-04-17 18:42:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:07,480 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:07,480 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:07,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,681 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-04-17 18:42:07,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:07,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132415821] [2020-04-17 18:42:07,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132415821] [2020-04-17 18:42:07,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260458203] [2020-04-17 18:42:07,749 INFO L92 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 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 [2020-04-17 18:42:07,796 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:07,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:07,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:07,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:07,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:07,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435649449] [2020-04-17 18:42:07,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:07,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:07,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:07,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:07,879 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-04-17 18:42:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:08,007 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 18:42:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:08,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:08,009 INFO L225 Difference]: With dead ends: 150 [2020-04-17 18:42:08,009 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 18:42:08,009 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:08,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 18:42:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-04-17 18:42:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-04-17 18:42:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-04-17 18:42:08,015 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-04-17 18:42:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:08,016 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-04-17 18:42:08,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-04-17 18:42:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:08,017 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:08,017 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:08,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,218 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:08,219 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-04-17 18:42:08,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:08,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634061939] [2020-04-17 18:42:08,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634061939] [2020-04-17 18:42:08,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776463652] [2020-04-17 18:42:08,296 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,336 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:08,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:08,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:08,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:08,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:08,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312444911] [2020-04-17 18:42:08,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:08,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:08,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:08,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:08,433 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:08,564 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-04-17 18:42:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:08,565 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:08,566 INFO L225 Difference]: With dead ends: 148 [2020-04-17 18:42:08,567 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 18:42:08,567 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 18:42:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-04-17 18:42:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 18:42:08,571 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 18:42:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:08,572 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 18:42:08,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 18:42:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:08,572 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:08,573 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:08,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,776 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-04-17 18:42:08,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:08,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071025592] [2020-04-17 18:42:08,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071025592] [2020-04-17 18:42:08,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233749239] [2020-04-17 18:42:08,852 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:42:08,916 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:08,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:08,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:08,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:08,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:08,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849319029] [2020-04-17 18:42:08,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:08,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:08,996 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 18:42:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:09,121 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-04-17 18:42:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:09,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:09,122 INFO L225 Difference]: With dead ends: 149 [2020-04-17 18:42:09,122 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 18:42:09,123 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:09,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 18:42:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-04-17 18:42:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-04-17 18:42:09,127 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-04-17 18:42:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:09,127 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-04-17 18:42:09,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:09,128 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-04-17 18:42:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:09,128 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:09,128 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:09,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,332 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-04-17 18:42:09,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:09,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720245574] [2020-04-17 18:42:09,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720245574] [2020-04-17 18:42:09,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698034226] [2020-04-17 18:42:09,414 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:42:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:09,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:09,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:09,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587590259] [2020-04-17 18:42:09,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:09,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:09,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:09,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:09,559 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-04-17 18:42:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:09,629 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-04-17 18:42:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:09,630 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:09,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:09,631 INFO L225 Difference]: With dead ends: 152 [2020-04-17 18:42:09,631 INFO L226 Difference]: Without dead ends: 150 [2020-04-17 18:42:09,631 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-04-17 18:42:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-04-17 18:42:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-04-17 18:42:09,635 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-04-17 18:42:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:09,636 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-04-17 18:42:09,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-04-17 18:42:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:09,636 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:09,636 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:09,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,837 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-04-17 18:42:09,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:09,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789895525] [2020-04-17 18:42:09,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789895525] [2020-04-17 18:42:09,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203141979] [2020-04-17 18:42:09,913 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:09,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:09,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:09,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:09,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:10,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:10,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307051424] [2020-04-17 18:42:10,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:10,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:10,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:10,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:10,039 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-04-17 18:42:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:10,179 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-04-17 18:42:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:10,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:10,182 INFO L225 Difference]: With dead ends: 153 [2020-04-17 18:42:10,182 INFO L226 Difference]: Without dead ends: 151 [2020-04-17 18:42:10,182 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-04-17 18:42:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-04-17 18:42:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 18:42:10,186 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 18:42:10,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:10,186 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 18:42:10,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:10,186 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 18:42:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:10,187 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:10,187 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:10,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,391 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:10,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-04-17 18:42:10,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:10,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682936273] [2020-04-17 18:42:10,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682936273] [2020-04-17 18:42:10,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354806107] [2020-04-17 18:42:10,467 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:42:10,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:10,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:10,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:10,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:10,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:10,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939813673] [2020-04-17 18:42:10,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:10,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:10,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:10,586 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 18:42:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:10,736 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:10,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:10,738 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:10,738 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 18:42:10,739 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 18:42:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-04-17 18:42:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 18:42:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-04-17 18:42:10,743 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-04-17 18:42:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:10,743 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-04-17 18:42:10,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-04-17 18:42:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:10,744 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:10,744 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:10,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,945 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-04-17 18:42:10,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:10,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684429640] [2020-04-17 18:42:10,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684429640] [2020-04-17 18:42:11,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704673462] [2020-04-17 18:42:11,040 INFO L92 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 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 [2020-04-17 18:42:11,080 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:11,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:11,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:11,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:11,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:11,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766078805] [2020-04-17 18:42:11,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:11,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:11,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:11,160 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-04-17 18:42:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:11,247 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 18:42:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:11,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:11,249 INFO L225 Difference]: With dead ends: 148 [2020-04-17 18:42:11,249 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 18:42:11,249 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 18:42:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-04-17 18:42:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 18:42:11,254 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 18:42:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:11,254 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 18:42:11,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 18:42:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:11,255 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:11,255 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:11,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,458 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:11,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-04-17 18:42:11,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:11,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758295668] [2020-04-17 18:42:11,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758295668] [2020-04-17 18:42:11,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178628469] [2020-04-17 18:42:11,523 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:11,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:11,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:11,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:11,582 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:11,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:11,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562444535] [2020-04-17 18:42:11,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:11,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:11,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:11,710 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:11,879 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-04-17 18:42:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:11,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:11,880 INFO L225 Difference]: With dead ends: 157 [2020-04-17 18:42:11,880 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 18:42:11,881 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 18:42:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-04-17 18:42:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-04-17 18:42:11,884 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-04-17 18:42:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:11,885 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-04-17 18:42:11,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-04-17 18:42:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:11,885 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:11,885 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:12,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,089 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-04-17 18:42:12,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:12,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560656345] [2020-04-17 18:42:12,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560656345] [2020-04-17 18:42:12,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193956480] [2020-04-17 18:42:12,160 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:42:12,201 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:12,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:12,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:12,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:12,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:12,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208489714] [2020-04-17 18:42:12,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:12,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:12,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:12,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:12,317 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-04-17 18:42:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:12,421 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-04-17 18:42:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:12,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:12,423 INFO L225 Difference]: With dead ends: 149 [2020-04-17 18:42:12,423 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 18:42:12,424 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 18:42:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-04-17 18:42:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:12,427 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:12,428 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:12,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:12,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:12,428 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:12,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,629 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-04-17 18:42:12,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:12,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124543863] [2020-04-17 18:42:12,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124543863] [2020-04-17 18:42:12,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69779376] [2020-04-17 18:42:12,699 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:42:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:12,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:12,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:12,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:12,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521893888] [2020-04-17 18:42:12,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:12,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:12,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:12,862 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:13,097 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-04-17 18:42:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:13,097 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:13,098 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:13,098 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:13,099 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 18:42:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-04-17 18:42:13,102 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-04-17 18:42:13,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:13,103 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-04-17 18:42:13,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-04-17 18:42:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:13,103 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:13,104 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:13,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,305 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:13,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:13,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-04-17 18:42:13,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:13,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186238305] [2020-04-17 18:42:13,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186238305] [2020-04-17 18:42:13,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052582031] [2020-04-17 18:42:13,360 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:13,403 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:13,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:13,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:13,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:13,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:13,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096191684] [2020-04-17 18:42:13,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:13,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:13,489 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:13,666 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:13,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:13,668 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:13,668 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 18:42:13,669 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 18:42:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-04-17 18:42:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:13,673 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:13,673 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:13,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:13,674 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:13,674 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:13,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,877 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-04-17 18:42:13,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:13,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126844973] [2020-04-17 18:42:13,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126844973] [2020-04-17 18:42:13,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034177718] [2020-04-17 18:42:13,934 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:13,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:13,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:13,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:14,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:14,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:14,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056818166] [2020-04-17 18:42:14,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:14,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:14,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:14,085 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:14,447 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-04-17 18:42:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:14,447 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:14,449 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:14,449 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 18:42:14,450 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:42:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 18:42:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-04-17 18:42:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:14,454 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:14,454 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:14,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:14,455 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:14,455 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:14,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:14,658 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:14,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-04-17 18:42:14,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:14,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477346303] [2020-04-17 18:42:14,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477346303] [2020-04-17 18:42:14,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887230189] [2020-04-17 18:42:14,717 INFO L92 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 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 [2020-04-17 18:42:14,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:14,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:14,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:14,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:14,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:14,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:14,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313880669] [2020-04-17 18:42:14,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:14,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:14,852 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:15,088 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-04-17 18:42:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:15,088 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:15,089 INFO L225 Difference]: With dead ends: 166 [2020-04-17 18:42:15,089 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:15,090 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-04-17 18:42:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-04-17 18:42:15,093 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-04-17 18:42:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:15,094 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-04-17 18:42:15,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-04-17 18:42:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:15,094 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:15,094 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:15,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,298 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:15,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-04-17 18:42:15,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:15,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288086066] [2020-04-17 18:42:15,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288086066] [2020-04-17 18:42:15,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560412027] [2020-04-17 18:42:15,361 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:15,419 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:15,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:15,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:15,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:15,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:15,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057944784] [2020-04-17 18:42:15,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:15,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:15,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:15,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:15,511 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-04-17 18:42:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:15,683 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-04-17 18:42:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:15,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:15,684 INFO L225 Difference]: With dead ends: 163 [2020-04-17 18:42:15,685 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:15,685 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-04-17 18:42:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 18:42:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-04-17 18:42:15,689 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-04-17 18:42:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:15,689 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-04-17 18:42:15,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-04-17 18:42:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:15,690 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:15,690 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:15,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,893 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:15,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-04-17 18:42:15,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:15,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561568740] [2020-04-17 18:42:15,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561568740] [2020-04-17 18:42:15,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018385940] [2020-04-17 18:42:15,952 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:42:15,991 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:15,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:15,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:15,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:16,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:16,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435726522] [2020-04-17 18:42:16,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:16,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:16,083 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:16,328 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-04-17 18:42:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:16,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:16,333 INFO L225 Difference]: With dead ends: 170 [2020-04-17 18:42:16,333 INFO L226 Difference]: Without dead ends: 168 [2020-04-17 18:42:16,333 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-04-17 18:42:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-04-17 18:42:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 18:42:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-04-17 18:42:16,337 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-04-17 18:42:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:16,337 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-04-17 18:42:16,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-04-17 18:42:16,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:16,338 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:16,338 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:16,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:16,541 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:16,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-04-17 18:42:16,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:16,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102979180] [2020-04-17 18:42:16,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102979180] [2020-04-17 18:42:16,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794355324] [2020-04-17 18:42:16,607 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:42:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:16,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:16,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:16,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:16,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:16,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022119054] [2020-04-17 18:42:16,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:16,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:16,720 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-04-17 18:42:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:17,000 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-04-17 18:42:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:17,001 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:17,003 INFO L225 Difference]: With dead ends: 177 [2020-04-17 18:42:17,003 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 18:42:17,003 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 18:42:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-04-17 18:42:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-04-17 18:42:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-04-17 18:42:17,007 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-04-17 18:42:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:17,008 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-04-17 18:42:17,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-04-17 18:42:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:17,008 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:17,008 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:17,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,212 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-04-17 18:42:17,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:17,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815346735] [2020-04-17 18:42:17,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815346735] [2020-04-17 18:42:17,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103937882] [2020-04-17 18:42:17,284 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:17,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:17,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:17,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:17,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:17,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:17,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886071264] [2020-04-17 18:42:17,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:17,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:17,415 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-04-17 18:42:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:17,764 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-04-17 18:42:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:17,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:17,766 INFO L225 Difference]: With dead ends: 190 [2020-04-17 18:42:17,767 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 18:42:17,767 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:42:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 18:42:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-04-17 18:42:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-04-17 18:42:17,771 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-04-17 18:42:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:17,771 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-04-17 18:42:17,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-04-17 18:42:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:17,772 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:17,772 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:17,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,972 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:17,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-04-17 18:42:17,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:17,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216785767] [2020-04-17 18:42:17,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216785767] [2020-04-17 18:42:18,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412989973] [2020-04-17 18:42:18,035 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:18,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:18,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:18,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:18,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:18,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:18,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420102124] [2020-04-17 18:42:18,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:18,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:18,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:18,159 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-04-17 18:42:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:18,495 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-04-17 18:42:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:18,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:18,497 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:42:18,497 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 18:42:18,497 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 18:42:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-04-17 18:42:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-04-17 18:42:18,501 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-04-17 18:42:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:18,501 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-04-17 18:42:18,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-04-17 18:42:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:18,501 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:18,502 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:18,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,705 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-04-17 18:42:18,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:18,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568410170] [2020-04-17 18:42:18,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568410170] [2020-04-17 18:42:18,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233467922] [2020-04-17 18:42:18,778 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,823 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:18,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:18,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:18,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:18,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:18,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254990481] [2020-04-17 18:42:18,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:18,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:18,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:18,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:18,899 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-04-17 18:42:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:19,047 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-04-17 18:42:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:19,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:19,049 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:19,049 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 18:42:19,049 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 18:42:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-04-17 18:42:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-04-17 18:42:19,053 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-04-17 18:42:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:19,053 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-04-17 18:42:19,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-04-17 18:42:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:19,053 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:19,053 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:19,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,256 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-04-17 18:42:19,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:19,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79777337] [2020-04-17 18:42:19,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79777337] [2020-04-17 18:42:19,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084508171] [2020-04-17 18:42:19,340 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,396 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:19,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:19,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:19,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:19,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:19,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303111450] [2020-04-17 18:42:19,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:19,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:19,505 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-04-17 18:42:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:19,693 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-04-17 18:42:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:19,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:19,695 INFO L225 Difference]: With dead ends: 161 [2020-04-17 18:42:19,695 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:19,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-04-17 18:42:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-04-17 18:42:19,698 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-04-17 18:42:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:19,701 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-04-17 18:42:19,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-04-17 18:42:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:19,702 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:19,702 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:19,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,905 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:19,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-04-17 18:42:19,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:19,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47813097] [2020-04-17 18:42:19,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47813097] [2020-04-17 18:42:19,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704511432] [2020-04-17 18:42:19,979 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,020 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:20,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:20,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:20,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:20,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:20,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029571044] [2020-04-17 18:42:20,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:20,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:20,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:20,103 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-04-17 18:42:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:20,311 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-04-17 18:42:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:20,312 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:20,313 INFO L225 Difference]: With dead ends: 165 [2020-04-17 18:42:20,314 INFO L226 Difference]: Without dead ends: 163 [2020-04-17 18:42:20,314 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-04-17 18:42:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-04-17 18:42:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-04-17 18:42:20,318 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-04-17 18:42:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:20,319 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-04-17 18:42:20,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-04-17 18:42:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:20,319 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:20,319 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:20,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,523 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-04-17 18:42:20,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:20,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922861202] [2020-04-17 18:42:20,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922861202] [2020-04-17 18:42:20,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392834708] [2020-04-17 18:42:20,579 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:20,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:20,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:20,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510451038] [2020-04-17 18:42:20,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:20,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:20,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:20,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:20,701 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-04-17 18:42:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:20,914 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-04-17 18:42:20,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:20,915 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:20,916 INFO L225 Difference]: With dead ends: 167 [2020-04-17 18:42:20,917 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 18:42:20,917 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 18:42:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-04-17 18:42:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 18:42:20,921 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 18:42:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:20,921 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 18:42:20,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:20,921 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 18:42:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:20,922 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:20,922 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:21,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,125 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-04-17 18:42:21,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:21,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952813942] [2020-04-17 18:42:21,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952813942] [2020-04-17 18:42:21,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598342993] [2020-04-17 18:42:21,200 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:21,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:21,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:21,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:21,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:21,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671853181] [2020-04-17 18:42:21,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:21,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:21,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:21,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:21,318 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:21,558 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-04-17 18:42:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:21,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:21,560 INFO L225 Difference]: With dead ends: 168 [2020-04-17 18:42:21,560 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 18:42:21,560 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 18:42:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-04-17 18:42:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 18:42:21,563 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 18:42:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:21,563 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 18:42:21,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 18:42:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:21,563 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:21,564 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:21,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,764 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-04-17 18:42:21,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:21,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020290590] [2020-04-17 18:42:21,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020290590] [2020-04-17 18:42:21,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540659891] [2020-04-17 18:42:21,824 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:21,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:21,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:21,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:21,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:21,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:21,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463486442] [2020-04-17 18:42:21,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:21,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:21,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:21,931 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:22,133 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-04-17 18:42:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:22,134 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:22,136 INFO L225 Difference]: With dead ends: 160 [2020-04-17 18:42:22,136 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 18:42:22,136 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 18:42:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-04-17 18:42:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 18:42:22,139 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 18:42:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:22,139 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 18:42:22,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 18:42:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:22,140 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:22,140 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:22,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,343 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:22,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-04-17 18:42:22,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:22,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721646016] [2020-04-17 18:42:22,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721646016] [2020-04-17 18:42:22,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551319629] [2020-04-17 18:42:22,397 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:22,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:22,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:22,442 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:22,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:22,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:22,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535187845] [2020-04-17 18:42:22,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:22,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:22,508 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:22,835 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-04-17 18:42:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:22,836 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:22,837 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:42:22,837 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 18:42:22,838 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 18:42:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-04-17 18:42:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 18:42:22,841 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 18:42:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:22,841 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 18:42:22,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 18:42:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:22,842 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:22,842 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:23,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,045 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-04-17 18:42:23,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546369779] [2020-04-17 18:42:23,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546369779] [2020-04-17 18:42:23,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498329534] [2020-04-17 18:42:23,102 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,152 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:23,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:23,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:23,154 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:23,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:23,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509321607] [2020-04-17 18:42:23,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:23,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:23,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:23,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:23,294 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:23,533 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-04-17 18:42:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:23,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:23,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:23,535 INFO L225 Difference]: With dead ends: 169 [2020-04-17 18:42:23,535 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 18:42:23,535 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 18:42:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-04-17 18:42:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 18:42:23,539 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 18:42:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:23,539 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 18:42:23,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 18:42:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:23,540 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,540 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:23,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,743 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-04-17 18:42:23,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624241916] [2020-04-17 18:42:23,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624241916] [2020-04-17 18:42:23,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636410792] [2020-04-17 18:42:23,806 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,866 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:23,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:23,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:23,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:23,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:23,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:23,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020531005] [2020-04-17 18:42:23,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:23,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:23,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:23,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:23,970 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:24,284 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-04-17 18:42:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:24,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:24,286 INFO L225 Difference]: With dead ends: 192 [2020-04-17 18:42:24,287 INFO L226 Difference]: Without dead ends: 184 [2020-04-17 18:42:24,287 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:42:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-04-17 18:42:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-04-17 18:42:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 18:42:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-04-17 18:42:24,290 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-04-17 18:42:24,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:24,291 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-04-17 18:42:24,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-04-17 18:42:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:24,291 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:24,292 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:24,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,494 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:24,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:24,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-04-17 18:42:24,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:24,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392282322] [2020-04-17 18:42:24,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392282322] [2020-04-17 18:42:24,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108984607] [2020-04-17 18:42:24,555 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:42:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:24,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:24,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:24,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:24,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906834376] [2020-04-17 18:42:24,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:24,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:24,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:24,672 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-04-17 18:42:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:24,997 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-04-17 18:42:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:24,998 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:24,999 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:42:24,999 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 18:42:25,000 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 18:42:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-04-17 18:42:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 18:42:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-04-17 18:42:25,003 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-04-17 18:42:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:25,003 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-04-17 18:42:25,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-04-17 18:42:25,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:25,003 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:25,004 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:25,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:25,204 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-04-17 18:42:25,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:25,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205073443] [2020-04-17 18:42:25,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205073443] [2020-04-17 18:42:25,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727040149] [2020-04-17 18:42:25,278 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:25,319 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:25,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:25,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:25,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:25,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:25,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:42:25,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348826184] [2020-04-17 18:42:25,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:42:25,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:42:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:25,435 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-04-17 18:42:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:25,623 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-04-17 18:42:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:25,624 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-04-17 18:42:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:25,625 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:25,625 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:25,626 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 18:42:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-04-17 18:42:25,629 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-04-17 18:42:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:25,629 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-04-17 18:42:25,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:42:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-04-17 18:42:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:25,630 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:25,630 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:25,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:25,831 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:25,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-04-17 18:42:25,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:25,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016291071] [2020-04-17 18:42:25,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016291071] [2020-04-17 18:42:25,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633817328] [2020-04-17 18:42:25,946 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:42:25,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:25,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:25,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:25,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:26,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:26,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384653886] [2020-04-17 18:42:26,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:26,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:26,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:26,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,109 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-04-17 18:42:26,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:26,163 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:26,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:26,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:26,165 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:26,165 INFO L226 Difference]: Without dead ends: 153 [2020-04-17 18:42:26,165 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-04-17 18:42:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-04-17 18:42:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 18:42:26,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 18:42:26,168 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 18:42:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:26,169 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 18:42:26,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 18:42:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:26,169 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:26,169 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:26,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,373 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-04-17 18:42:26,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:26,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36512114] [2020-04-17 18:42:26,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36512114] [2020-04-17 18:42:26,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180964638] [2020-04-17 18:42:26,478 INFO L92 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 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 [2020-04-17 18:42:26,521 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:26,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:26,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:26,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:26,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:26,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595293709] [2020-04-17 18:42:26,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:26,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:26,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:26,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,619 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 18:42:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:26,702 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-04-17 18:42:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:26,703 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:26,704 INFO L225 Difference]: With dead ends: 170 [2020-04-17 18:42:26,704 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 18:42:26,705 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 18:42:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-04-17 18:42:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 18:42:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 18:42:26,708 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 18:42:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:26,708 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 18:42:26,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 18:42:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:26,709 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:26,709 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:26,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,911 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:26,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-04-17 18:42:26,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:26,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145100391] [2020-04-17 18:42:26,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145100391] [2020-04-17 18:42:27,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437995951] [2020-04-17 18:42:27,009 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,049 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:27,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:27,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:27,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:27,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:27,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583153228] [2020-04-17 18:42:27,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:27,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:27,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:27,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:27,167 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 18:42:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:27,252 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-04-17 18:42:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:27,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:27,254 INFO L225 Difference]: With dead ends: 169 [2020-04-17 18:42:27,254 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 18:42:27,254 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 18:42:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-04-17 18:42:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 18:42:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-04-17 18:42:27,258 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-04-17 18:42:27,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:27,258 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-04-17 18:42:27,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:27,258 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-04-17 18:42:27,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:27,259 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:27,259 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:27,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,464 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:27,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-04-17 18:42:27,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:27,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454941488] [2020-04-17 18:42:27,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454941488] [2020-04-17 18:42:27,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056859231] [2020-04-17 18:42:27,578 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:42:27,647 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:27,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:27,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:27,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:27,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:27,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840089896] [2020-04-17 18:42:27,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:27,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:27,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:27,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:27,814 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-04-17 18:42:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:27,962 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-04-17 18:42:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:27,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:27,964 INFO L225 Difference]: With dead ends: 168 [2020-04-17 18:42:27,964 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 18:42:27,965 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 18:42:27,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-04-17 18:42:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 18:42:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-04-17 18:42:27,970 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-04-17 18:42:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:27,970 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-04-17 18:42:27,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-04-17 18:42:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:27,971 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:27,972 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:28,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,177 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-04-17 18:42:28,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:28,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596823289] [2020-04-17 18:42:28,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596823289] [2020-04-17 18:42:28,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254418528] [2020-04-17 18:42:28,250 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:42:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:28,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:28,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:28,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:28,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672561369] [2020-04-17 18:42:28,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:28,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:28,400 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-04-17 18:42:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:28,540 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-04-17 18:42:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:28,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:28,542 INFO L225 Difference]: With dead ends: 167 [2020-04-17 18:42:28,542 INFO L226 Difference]: Without dead ends: 164 [2020-04-17 18:42:28,542 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-04-17 18:42:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-04-17 18:42:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 18:42:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-04-17 18:42:28,546 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-04-17 18:42:28,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:28,547 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-04-17 18:42:28,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-04-17 18:42:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:28,547 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:28,547 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:28,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,750 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:28,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:28,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-04-17 18:42:28,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:28,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223499582] [2020-04-17 18:42:28,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223499582] [2020-04-17 18:42:28,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457897320] [2020-04-17 18:42:28,826 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:28,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:28,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:28,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:28,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:28,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:28,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006960123] [2020-04-17 18:42:28,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:28,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:28,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:28,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:28,971 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-04-17 18:42:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:29,158 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-04-17 18:42:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:29,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:29,160 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:29,160 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 18:42:29,161 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 18:42:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-04-17 18:42:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 18:42:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-04-17 18:42:29,164 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-04-17 18:42:29,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:29,165 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-04-17 18:42:29,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-04-17 18:42:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:29,165 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:29,165 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:29,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,366 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-04-17 18:42:29,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:29,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291034309] [2020-04-17 18:42:29,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291034309] [2020-04-17 18:42:29,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480715911] [2020-04-17 18:42:29,449 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:29,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:29,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:29,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:29,491 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:29,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:29,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452532355] [2020-04-17 18:42:29,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:29,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:29,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:29,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,603 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-04-17 18:42:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:29,654 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-04-17 18:42:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:29,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:29,656 INFO L225 Difference]: With dead ends: 163 [2020-04-17 18:42:29,656 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:29,656 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-04-17 18:42:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 18:42:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-04-17 18:42:29,660 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-04-17 18:42:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:29,660 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-04-17 18:42:29,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-04-17 18:42:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:29,661 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:29,661 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:29,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,861 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-04-17 18:42:29,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:29,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886744471] [2020-04-17 18:42:29,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886744471] [2020-04-17 18:42:29,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667610680] [2020-04-17 18:42:29,952 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:42:30,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:30,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:30,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:30,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:30,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:30,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725156946] [2020-04-17 18:42:30,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:30,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:30,142 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:30,288 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-04-17 18:42:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:30,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:30,290 INFO L225 Difference]: With dead ends: 172 [2020-04-17 18:42:30,290 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 18:42:30,290 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 18:42:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-04-17 18:42:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 18:42:30,294 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 18:42:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:30,295 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 18:42:30,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 18:42:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:30,295 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:30,296 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:30,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:30,499 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-04-17 18:42:30,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:30,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731987996] [2020-04-17 18:42:30,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731987996] [2020-04-17 18:42:30,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041585531] [2020-04-17 18:42:30,588 INFO L92 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 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 [2020-04-17 18:42:30,630 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:30,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:30,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:30,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:35,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:35,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:35,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608524892] [2020-04-17 18:42:35,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:35,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:35,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:35,728 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 18:42:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:35,925 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 18:42:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:35,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:35,927 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:35,928 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:35,928 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:35,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-04-17 18:42:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 18:42:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-04-17 18:42:35,932 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-04-17 18:42:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:35,932 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-04-17 18:42:35,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-04-17 18:42:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:35,933 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:35,933 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:36,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:36,136 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:36,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-04-17 18:42:36,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:36,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169163789] [2020-04-17 18:42:36,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:36,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169163789] [2020-04-17 18:42:36,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737770832] [2020-04-17 18:42:36,228 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:36,270 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:36,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:36,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:36,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:36,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:36,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:36,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851285454] [2020-04-17 18:42:36,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:36,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:36,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:36,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:36,405 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-04-17 18:42:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:36,588 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 18:42:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:36,589 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:36,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:36,591 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:36,591 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:36,591 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-04-17 18:42:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 18:42:36,596 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 18:42:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:36,596 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 18:42:36,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 18:42:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:36,597 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:36,597 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:36,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:36,798 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-04-17 18:42:36,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:36,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305901699] [2020-04-17 18:42:36,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:36,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305901699] [2020-04-17 18:42:36,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728698312] [2020-04-17 18:42:36,880 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:42:36,927 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:36,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:36,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:36,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:37,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:37,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:37,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417863195] [2020-04-17 18:42:37,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:37,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:37,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:37,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:37,028 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 18:42:37,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:37,224 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-04-17 18:42:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:37,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:37,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:37,226 INFO L225 Difference]: With dead ends: 184 [2020-04-17 18:42:37,226 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 18:42:37,226 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 18:42:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-04-17 18:42:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-04-17 18:42:37,229 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-04-17 18:42:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:37,230 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-04-17 18:42:37,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-04-17 18:42:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:37,232 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:37,232 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:37,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:37,436 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-04-17 18:42:37,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:37,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778238592] [2020-04-17 18:42:37,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:37,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778238592] [2020-04-17 18:42:37,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996268833] [2020-04-17 18:42:37,514 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:42:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:37,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:37,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:38,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:38,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:38,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545285084] [2020-04-17 18:42:38,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:38,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:38,102 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-04-17 18:42:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:38,293 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-04-17 18:42:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:38,293 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:38,295 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:38,295 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:38,295 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-04-17 18:42:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-04-17 18:42:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-04-17 18:42:38,298 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-04-17 18:42:38,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:38,298 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-04-17 18:42:38,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-04-17 18:42:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:38,299 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:38,299 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:38,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:38,502 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:38,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-04-17 18:42:38,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:38,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112478810] [2020-04-17 18:42:38,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:38,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112478810] [2020-04-17 18:42:38,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129364904] [2020-04-17 18:42:38,586 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:38,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:38,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:38,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:38,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:38,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:38,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:38,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145508196] [2020-04-17 18:42:38,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:38,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:38,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:38,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:38,737 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-04-17 18:42:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:38,886 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-04-17 18:42:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:38,887 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:38,889 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:38,889 INFO L226 Difference]: Without dead ends: 174 [2020-04-17 18:42:38,889 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-04-17 18:42:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-04-17 18:42:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:42:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-04-17 18:42:38,892 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-04-17 18:42:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:38,892 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-04-17 18:42:38,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-04-17 18:42:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:38,893 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:38,893 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:39,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:39,094 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-04-17 18:42:39,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:39,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102796128] [2020-04-17 18:42:39,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:39,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102796128] [2020-04-17 18:42:39,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875149394] [2020-04-17 18:42:39,181 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:39,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:39,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:39,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:39,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:39,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:39,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:39,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891324413] [2020-04-17 18:42:39,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:39,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:39,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:39,706 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:39,950 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 18:42:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:39,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:39,952 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:39,953 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:39,953 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-04-17 18:42:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-04-17 18:42:39,958 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-04-17 18:42:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:39,958 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-04-17 18:42:39,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-04-17 18:42:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:39,959 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:39,959 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:40,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:40,160 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:40,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-04-17 18:42:40,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:40,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121720062] [2020-04-17 18:42:40,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:40,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121720062] [2020-04-17 18:42:40,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589509352] [2020-04-17 18:42:40,256 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:40,295 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:40,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:40,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:40,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:40,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:40,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:40,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943943022] [2020-04-17 18:42:40,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:40,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:40,386 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-04-17 18:42:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:40,574 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 18:42:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:40,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:40,576 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:40,576 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:40,576 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-04-17 18:42:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 18:42:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-04-17 18:42:40,580 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-04-17 18:42:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:40,580 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-04-17 18:42:40,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-04-17 18:42:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:40,581 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:40,581 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:40,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:40,781 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:40,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-04-17 18:42:40,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:40,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088691490] [2020-04-17 18:42:40,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:40,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088691490] [2020-04-17 18:42:40,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206546644] [2020-04-17 18:42:40,897 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:40,937 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:40,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:40,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:40,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:41,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:41,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:41,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709384943] [2020-04-17 18:42:41,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:41,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:41,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:41,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:41,042 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-04-17 18:42:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:41,188 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-04-17 18:42:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:41,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:41,191 INFO L225 Difference]: With dead ends: 182 [2020-04-17 18:42:41,191 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 18:42:41,191 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 18:42:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-04-17 18:42:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:42:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-04-17 18:42:41,199 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-04-17 18:42:41,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:41,199 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-04-17 18:42:41,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-04-17 18:42:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:41,202 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:41,202 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:41,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:41,403 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-04-17 18:42:41,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:41,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547038260] [2020-04-17 18:42:41,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:41,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547038260] [2020-04-17 18:42:41,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188723086] [2020-04-17 18:42:41,564 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:41,629 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:41,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:41,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:41,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:41,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:41,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:41,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836080047] [2020-04-17 18:42:41,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:41,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:41,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:41,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:41,762 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-04-17 18:42:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:41,952 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-04-17 18:42:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:42:41,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:41,954 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:41,955 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:41,955 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-04-17 18:42:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 18:42:41,962 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 18:42:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:41,963 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 18:42:41,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 18:42:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:41,964 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:41,964 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:42,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:42,169 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:42,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-04-17 18:42:42,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:42,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116595578] [2020-04-17 18:42:42,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:42,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116595578] [2020-04-17 18:42:42,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892508440] [2020-04-17 18:42:42,265 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:42:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:42,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:42,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:44,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:44,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:44,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639395921] [2020-04-17 18:42:44,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:44,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:44,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:44,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:44,456 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:44,680 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-04-17 18:42:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:42:44,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:44,682 INFO L225 Difference]: With dead ends: 191 [2020-04-17 18:42:44,683 INFO L226 Difference]: Without dead ends: 189 [2020-04-17 18:42:44,683 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:44,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-04-17 18:42:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-04-17 18:42:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-04-17 18:42:44,687 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-04-17 18:42:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:44,687 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-04-17 18:42:44,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-04-17 18:42:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:44,688 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:44,688 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:44,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:44,891 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:44,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-04-17 18:42:44,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:44,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859209279] [2020-04-17 18:42:44,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:44,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859209279] [2020-04-17 18:42:44,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739978491] [2020-04-17 18:42:44,994 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:45,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:45,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:45,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:45,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:45,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:45,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:45,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707037198] [2020-04-17 18:42:45,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:45,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:45,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:45,141 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-04-17 18:42:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:45,385 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-04-17 18:42:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:45,386 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:45,387 INFO L225 Difference]: With dead ends: 187 [2020-04-17 18:42:45,387 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 18:42:45,388 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 18:42:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-04-17 18:42:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 18:42:45,392 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 18:42:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:45,392 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 18:42:45,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 18:42:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:45,393 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:45,393 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:45,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:45,594 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:45,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-04-17 18:42:45,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:45,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747283250] [2020-04-17 18:42:45,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:45,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747283250] [2020-04-17 18:42:45,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90048935] [2020-04-17 18:42:45,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:42:45,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:45,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:45,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:45,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:45,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:45,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:45,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494858303] [2020-04-17 18:42:45,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:45,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:45,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:45,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:45,826 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:46,066 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-04-17 18:42:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:46,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:46,068 INFO L225 Difference]: With dead ends: 198 [2020-04-17 18:42:46,068 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:42:46,069 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:46,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:42:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-04-17 18:42:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-04-17 18:42:46,073 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-04-17 18:42:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:46,073 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-04-17 18:42:46,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-04-17 18:42:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:46,073 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:46,074 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:46,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:46,274 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:46,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-04-17 18:42:46,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:46,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065672797] [2020-04-17 18:42:46,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:46,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065672797] [2020-04-17 18:42:46,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557509154] [2020-04-17 18:42:46,363 INFO L92 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 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 [2020-04-17 18:42:46,422 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:46,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:46,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:46,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:47,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:47,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:47,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428550318] [2020-04-17 18:42:47,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:47,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:47,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:47,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:47,257 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-04-17 18:42:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:47,512 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-04-17 18:42:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:47,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:47,514 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:42:47,515 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 18:42:47,515 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 18:42:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-04-17 18:42:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:42:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-04-17 18:42:47,518 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-04-17 18:42:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:47,519 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-04-17 18:42:47,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-04-17 18:42:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:47,519 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:47,519 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:47,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:47,720 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-04-17 18:42:47,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:47,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223230535] [2020-04-17 18:42:47,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:47,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223230535] [2020-04-17 18:42:47,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098761095] [2020-04-17 18:42:47,828 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:47,876 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:47,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:47,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:47,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:47,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:47,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:47,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158373393] [2020-04-17 18:42:47,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:47,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:47,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:47,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:47,982 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-04-17 18:42:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:48,092 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-04-17 18:42:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:48,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:48,094 INFO L225 Difference]: With dead ends: 178 [2020-04-17 18:42:48,094 INFO L226 Difference]: Without dead ends: 176 [2020-04-17 18:42:48,094 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-17 18:42:48,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-17 18:42:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:42:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-04-17 18:42:48,098 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-04-17 18:42:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:48,098 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-04-17 18:42:48,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-04-17 18:42:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:48,099 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:48,099 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:48,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:48,299 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:48,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-04-17 18:42:48,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:48,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883454410] [2020-04-17 18:42:48,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883454410] [2020-04-17 18:42:48,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55942513] [2020-04-17 18:42:48,391 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:42:48,433 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:48,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:48,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:48,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:48,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:48,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834585187] [2020-04-17 18:42:48,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:48,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:48,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:48,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:48,548 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-04-17 18:42:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:48,742 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-04-17 18:42:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:48,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:48,745 INFO L225 Difference]: With dead ends: 193 [2020-04-17 18:42:48,745 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 18:42:48,745 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 18:42:48,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-04-17 18:42:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:42:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-04-17 18:42:48,749 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-04-17 18:42:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:48,749 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-04-17 18:42:48,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-04-17 18:42:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:48,750 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:48,750 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:48,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:48,953 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:48,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-04-17 18:42:48,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:48,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626262856] [2020-04-17 18:42:48,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:49,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626262856] [2020-04-17 18:42:49,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495242494] [2020-04-17 18:42:49,033 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:42:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:49,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:49,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:51,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:51,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:51,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559224585] [2020-04-17 18:42:51,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:51,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:51,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:51,634 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-04-17 18:42:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:51,887 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 18:42:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:51,887 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:51,889 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:42:51,889 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:42:51,889 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:42:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-04-17 18:42:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-04-17 18:42:51,892 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-04-17 18:42:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:51,892 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-04-17 18:42:51,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-04-17 18:42:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:51,893 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:51,893 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:52,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:52,094 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:52,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-04-17 18:42:52,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:52,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544722206] [2020-04-17 18:42:52,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:52,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544722206] [2020-04-17 18:42:52,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878996485] [2020-04-17 18:42:52,186 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:52,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:52,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:52,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:52,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:52,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:52,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:52,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158564890] [2020-04-17 18:42:52,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:52,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:52,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:52,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:52,336 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-04-17 18:42:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:52,459 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-04-17 18:42:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:52,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:52,461 INFO L225 Difference]: With dead ends: 174 [2020-04-17 18:42:52,461 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 18:42:52,462 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 18:42:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-04-17 18:42:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-04-17 18:42:52,465 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-04-17 18:42:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:52,465 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-04-17 18:42:52,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-04-17 18:42:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:52,466 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:52,466 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:52,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:52,669 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:52,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-04-17 18:42:52,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:52,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216147730] [2020-04-17 18:42:52,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:52,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216147730] [2020-04-17 18:42:52,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241973805] [2020-04-17 18:42:52,746 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:42:52,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:52,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:52,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:52,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:52,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:52,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:52,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065359288] [2020-04-17 18:42:52,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:52,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:52,940 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-04-17 18:42:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:53,157 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-04-17 18:42:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:53,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:53,160 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:42:53,160 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 18:42:53,160 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 18:42:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-04-17 18:42:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:42:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-04-17 18:42:53,163 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-04-17 18:42:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:53,163 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-04-17 18:42:53,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-04-17 18:42:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:53,164 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:53,164 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:53,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:53,364 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:53,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-04-17 18:42:53,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:53,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385491653] [2020-04-17 18:42:53,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:53,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385491653] [2020-04-17 18:42:53,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514696666] [2020-04-17 18:42:53,447 INFO L92 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 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 [2020-04-17 18:42:53,489 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:53,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:53,490 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:53,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:53,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:53,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:53,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34800730] [2020-04-17 18:42:53,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:53,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:53,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:53,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:53,597 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-04-17 18:42:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:53,732 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-04-17 18:42:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:53,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:53,734 INFO L225 Difference]: With dead ends: 175 [2020-04-17 18:42:53,734 INFO L226 Difference]: Without dead ends: 173 [2020-04-17 18:42:53,735 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-04-17 18:42:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-04-17 18:42:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:42:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:42:53,738 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:42:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:53,738 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:42:53,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:42:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:53,739 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:53,739 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:53,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:53,941 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:53,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-04-17 18:42:53,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:53,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369699538] [2020-04-17 18:42:53,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:54,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369699538] [2020-04-17 18:42:54,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291113917] [2020-04-17 18:42:54,006 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:54,049 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:54,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:54,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:54,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:54,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:54,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:54,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:54,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889883935] [2020-04-17 18:42:54,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:54,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:54,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:54,142 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:54,448 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-04-17 18:42:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:54,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:54,450 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:42:54,450 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 18:42:54,451 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 18:42:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-04-17 18:42:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:42:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 18:42:54,454 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 18:42:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:54,455 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 18:42:54,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 18:42:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:54,455 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:54,455 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:54,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:54,656 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-04-17 18:42:54,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:54,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400348605] [2020-04-17 18:42:54,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:54,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400348605] [2020-04-17 18:42:54,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534987951] [2020-04-17 18:42:54,723 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:42:54,765 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:54,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:54,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:54,766 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:54,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:54,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:54,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993621114] [2020-04-17 18:42:54,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:54,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:54,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:54,886 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:55,132 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-04-17 18:42:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:42:55,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:55,134 INFO L225 Difference]: With dead ends: 187 [2020-04-17 18:42:55,135 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 18:42:55,135 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 18:42:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-04-17 18:42:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:42:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:42:55,138 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:42:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:55,138 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:42:55,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:42:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:55,139 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:55,139 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:55,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:55,340 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-04-17 18:42:55,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:55,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556072186] [2020-04-17 18:42:55,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:55,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556072186] [2020-04-17 18:42:55,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344420762] [2020-04-17 18:42:55,405 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:42:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:55,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:55,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:55,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:55,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:55,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:55,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080633697] [2020-04-17 18:42:55,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:55,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:55,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:55,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:55,975 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:56,431 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-04-17 18:42:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:56,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:56,434 INFO L225 Difference]: With dead ends: 212 [2020-04-17 18:42:56,434 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:42:56,434 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:42:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:42:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 18:42:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:42:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:42:56,441 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:42:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:56,441 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:42:56,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:42:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:56,442 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:56,442 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:56,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:56,645 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:56,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:56,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-04-17 18:42:56,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:56,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206145775] [2020-04-17 18:42:56,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:56,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206145775] [2020-04-17 18:42:56,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733628162] [2020-04-17 18:42:56,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:56,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:56,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:56,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:56,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:56,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:57,588 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-04-17 18:42:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:57,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:57,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:42:57,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307661192] [2020-04-17 18:42:57,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:42:57,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:42:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:42:57,591 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 16 states. [2020-04-17 18:42:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:57,929 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 18:42:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:57,930 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:42:57,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:57,932 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:42:57,932 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 18:42:57,932 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=208, Invalid=441, Unknown=1, NotChecked=0, Total=650 [2020-04-17 18:42:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 18:42:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-04-17 18:42:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:42:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-04-17 18:42:57,936 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-04-17 18:42:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:57,936 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-04-17 18:42:57,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:42:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-04-17 18:42:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:57,937 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:57,937 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:58,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:58,137 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:58,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-04-17 18:42:58,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:58,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809061279] [2020-04-17 18:42:58,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:58,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809061279] [2020-04-17 18:42:58,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187426910] [2020-04-17 18:42:58,204 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:42:58,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:58,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:58,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:58,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:58,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:58,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:58,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179283413] [2020-04-17 18:42:58,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:58,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:58,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:58,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:58,385 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-04-17 18:42:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:58,686 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-04-17 18:42:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:58,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:58,689 INFO L225 Difference]: With dead ends: 198 [2020-04-17 18:42:58,689 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:42:58,689 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:42:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-04-17 18:42:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:42:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 18:42:58,694 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 18:42:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:58,694 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 18:42:58,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 18:42:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:58,695 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:58,695 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:58,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:58,895 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:58,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-04-17 18:42:58,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:58,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702548370] [2020-04-17 18:42:58,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:58,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702548370] [2020-04-17 18:42:58,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444219454] [2020-04-17 18:42:58,966 INFO L92 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 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 [2020-04-17 18:42:59,012 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:59,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:59,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:59,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:59,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:59,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:59,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420305348] [2020-04-17 18:42:59,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:59,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:59,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:59,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:59,162 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:59,549 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-04-17 18:42:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:42:59,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:59,551 INFO L225 Difference]: With dead ends: 209 [2020-04-17 18:42:59,551 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:42:59,552 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:42:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 18:42:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:42:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:42:59,556 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:42:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:59,556 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:42:59,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:42:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:59,556 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:59,557 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:59,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:59,760 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:59,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:59,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-04-17 18:42:59,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:59,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359588381] [2020-04-17 18:42:59,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:59,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359588381] [2020-04-17 18:42:59,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227210155] [2020-04-17 18:42:59,839 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:42:59,891 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:59,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:59,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:59,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:00,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:00,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:00,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:00,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484817829] [2020-04-17 18:43:00,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:00,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:00,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:00,033 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:43:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:00,625 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-04-17 18:43:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:00,625 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:00,627 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:43:00,627 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:43:00,628 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:43:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:43:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-04-17 18:43:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 18:43:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-04-17 18:43:00,632 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-04-17 18:43:00,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:00,632 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-04-17 18:43:00,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-04-17 18:43:00,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:00,633 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:00,633 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:00,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:00,837 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-04-17 18:43:00,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:00,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412293912] [2020-04-17 18:43:00,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:00,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412293912] [2020-04-17 18:43:00,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81232325] [2020-04-17 18:43:00,903 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:43:00,942 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:00,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:00,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:00,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:01,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:01,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:01,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:01,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923455786] [2020-04-17 18:43:01,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:01,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:01,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:01,078 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-04-17 18:43:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:01,693 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-04-17 18:43:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:01,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:01,695 INFO L225 Difference]: With dead ends: 236 [2020-04-17 18:43:01,695 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 18:43:01,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 18:43:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-04-17 18:43:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-04-17 18:43:01,699 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-04-17 18:43:01,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:01,699 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-04-17 18:43:01,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:01,699 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-04-17 18:43:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:01,700 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:01,700 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:01,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:01,903 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:01,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-04-17 18:43:01,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:01,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839905607] [2020-04-17 18:43:01,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:01,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839905607] [2020-04-17 18:43:01,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830967141] [2020-04-17 18:43:01,974 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:43:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:02,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:02,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:02,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:02,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391332412] [2020-04-17 18:43:02,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:02,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:02,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:02,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:02,118 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-04-17 18:43:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:02,577 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 18:43:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:02,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:02,579 INFO L225 Difference]: With dead ends: 219 [2020-04-17 18:43:02,579 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 18:43:02,579 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:43:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 18:43:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-04-17 18:43:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-04-17 18:43:02,583 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-04-17 18:43:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:02,583 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-04-17 18:43:02,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-04-17 18:43:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:02,583 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:02,583 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:02,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,784 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:02,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:02,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-04-17 18:43:02,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:02,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178993967] [2020-04-17 18:43:02,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178993967] [2020-04-17 18:43:02,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929134742] [2020-04-17 18:43:02,848 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:02,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:02,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:02,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:02,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:02,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632706491] [2020-04-17 18:43:02,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:02,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:02,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:02,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:02,996 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:03,222 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-04-17 18:43:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:03,222 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:03,223 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:43:03,223 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 18:43:03,224 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:03,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 18:43:03,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-04-17 18:43:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-04-17 18:43:03,228 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-04-17 18:43:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:03,228 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-04-17 18:43:03,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-04-17 18:43:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:03,229 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:03,229 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:03,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:03,432 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:03,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-04-17 18:43:03,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:03,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159343428] [2020-04-17 18:43:03,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:03,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159343428] [2020-04-17 18:43:03,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680286737] [2020-04-17 18:43:03,516 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:43:03,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:03,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:03,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:03,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:03,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:03,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:03,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848886514] [2020-04-17 18:43:03,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:03,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:03,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:03,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:03,660 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-04-17 18:43:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:03,906 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-04-17 18:43:03,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:03,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:03,907 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:03,908 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 18:43:03,908 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 18:43:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-04-17 18:43:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-04-17 18:43:03,912 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-04-17 18:43:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:03,912 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-04-17 18:43:03,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-04-17 18:43:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:03,913 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:03,913 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:04,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:04,117 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:04,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-04-17 18:43:04,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:04,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474435577] [2020-04-17 18:43:04,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:04,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474435577] [2020-04-17 18:43:04,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415583228] [2020-04-17 18:43:04,182 INFO L92 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 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 [2020-04-17 18:43:04,223 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:04,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:04,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:04,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:04,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:04,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:04,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272666420] [2020-04-17 18:43:04,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:04,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:04,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:04,769 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-04-17 18:43:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:05,019 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-04-17 18:43:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:05,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:05,021 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:43:05,021 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 18:43:05,021 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 18:43:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-04-17 18:43:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-04-17 18:43:05,025 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-04-17 18:43:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:05,025 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-04-17 18:43:05,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-04-17 18:43:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:05,025 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:05,025 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:05,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:05,226 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:05,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:05,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-04-17 18:43:05,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:05,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765068347] [2020-04-17 18:43:05,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:05,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765068347] [2020-04-17 18:43:05,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230697808] [2020-04-17 18:43:05,290 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:05,331 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:05,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:05,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:05,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:05,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:05,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:05,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995629557] [2020-04-17 18:43:05,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:05,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:05,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:05,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:05,457 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-04-17 18:43:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:05,829 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-04-17 18:43:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:43:05,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:05,831 INFO L225 Difference]: With dead ends: 214 [2020-04-17 18:43:05,831 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:43:05,832 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:43:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-04-17 18:43:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-04-17 18:43:05,836 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-04-17 18:43:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:05,836 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-04-17 18:43:05,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-04-17 18:43:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:05,837 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:05,837 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:06,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:06,040 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:06,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-04-17 18:43:06,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:06,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098138428] [2020-04-17 18:43:06,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:06,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098138428] [2020-04-17 18:43:06,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623372522] [2020-04-17 18:43:06,136 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:43:06,176 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:06,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:06,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:06,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:06,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:06,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:06,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812532473] [2020-04-17 18:43:06,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:06,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:06,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:06,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:06,274 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-04-17 18:43:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:06,630 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-04-17 18:43:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:06,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:06,632 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:43:06,632 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:43:06,632 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:43:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 18:43:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 18:43:06,637 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 18:43:06,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:06,637 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 18:43:06,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 18:43:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:06,638 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:06,638 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:06,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:06,841 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:06,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-04-17 18:43:06,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:06,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732204723] [2020-04-17 18:43:06,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:06,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732204723] [2020-04-17 18:43:06,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776112292] [2020-04-17 18:43:06,907 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:43:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:06,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:06,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:07,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:07,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:07,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927746945] [2020-04-17 18:43:07,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:07,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:07,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:07,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:07,065 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:07,438 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-04-17 18:43:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:07,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:07,439 INFO L225 Difference]: With dead ends: 211 [2020-04-17 18:43:07,439 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 18:43:07,440 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:07,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 18:43:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-04-17 18:43:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:07,443 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:07,443 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:07,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:07,444 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:07,444 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:07,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:07,645 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:07,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-04-17 18:43:07,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:07,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145014534] [2020-04-17 18:43:07,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:07,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145014534] [2020-04-17 18:43:07,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639984743] [2020-04-17 18:43:07,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:07,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:07,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:07,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:07,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:07,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:07,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:07,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:07,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278943883] [2020-04-17 18:43:07,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:07,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:07,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:07,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:07,837 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:08,255 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-04-17 18:43:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:08,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:08,257 INFO L225 Difference]: With dead ends: 211 [2020-04-17 18:43:08,257 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 18:43:08,257 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:43:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 18:43:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-04-17 18:43:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:08,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:08,261 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:08,262 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:08,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:08,262 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:08,262 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:08,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:08,463 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-04-17 18:43:08,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:08,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157348401] [2020-04-17 18:43:08,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:08,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157348401] [2020-04-17 18:43:08,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442392844] [2020-04-17 18:43:08,557 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:43:08,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:08,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:08,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:08,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:08,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:08,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:08,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:08,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640579153] [2020-04-17 18:43:08,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:08,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:08,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:08,693 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:09,198 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-04-17 18:43:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:43:09,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:09,200 INFO L225 Difference]: With dead ends: 227 [2020-04-17 18:43:09,200 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 18:43:09,200 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:43:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 18:43:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-04-17 18:43:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 18:43:09,204 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 18:43:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:09,204 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 18:43:09,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 18:43:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:09,205 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:09,205 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:09,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:09,405 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:09,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:09,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-04-17 18:43:09,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:09,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093299141] [2020-04-17 18:43:09,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:09,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093299141] [2020-04-17 18:43:09,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175843061] [2020-04-17 18:43:09,465 INFO L92 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 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 [2020-04-17 18:43:09,505 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:09,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:09,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:09,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:09,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:09,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:09,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432341165] [2020-04-17 18:43:09,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:09,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:09,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:09,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:09,618 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:10,035 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-04-17 18:43:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:43:10,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:10,036 INFO L225 Difference]: With dead ends: 221 [2020-04-17 18:43:10,036 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 18:43:10,037 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 18:43:10,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-04-17 18:43:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:10,039 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:10,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:10,039 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:10,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:10,040 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:10,040 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:10,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:10,241 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-04-17 18:43:10,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:10,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394357307] [2020-04-17 18:43:10,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:10,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394357307] [2020-04-17 18:43:10,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672935803] [2020-04-17 18:43:10,319 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:10,368 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:10,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:10,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:10,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:10,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:10,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:10,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:10,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72243841] [2020-04-17 18:43:10,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:10,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:10,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:10,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:10,450 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:10,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:10,962 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-04-17 18:43:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:10,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:10,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:10,964 INFO L225 Difference]: With dead ends: 240 [2020-04-17 18:43:10,964 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 18:43:10,964 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 18:43:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-04-17 18:43:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 18:43:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-04-17 18:43:10,968 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-04-17 18:43:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:10,968 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-04-17 18:43:10,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-04-17 18:43:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:10,969 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:10,969 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:11,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:11,172 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:11,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-04-17 18:43:11,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:11,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968867890] [2020-04-17 18:43:11,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968867890] [2020-04-17 18:43:11,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158228276] [2020-04-17 18:43:11,235 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:43:11,277 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:11,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:11,278 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:11,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:11,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:11,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:11,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220599103] [2020-04-17 18:43:11,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:11,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:11,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:11,358 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-04-17 18:43:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:11,916 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-04-17 18:43:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:11,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:11,918 INFO L225 Difference]: With dead ends: 238 [2020-04-17 18:43:11,918 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 18:43:11,918 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 18:43:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-04-17 18:43:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 18:43:11,923 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 18:43:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:11,923 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 18:43:11,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 18:43:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:11,924 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:11,924 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:12,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:12,127 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:12,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-04-17 18:43:12,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:12,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947103855] [2020-04-17 18:43:12,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:12,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947103855] [2020-04-17 18:43:12,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943708430] [2020-04-17 18:43:12,217 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:43:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:12,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:12,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:12,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:12,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:12,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21880246] [2020-04-17 18:43:12,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:12,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:12,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:12,758 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 18:43:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:12,993 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-04-17 18:43:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:12,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:12,995 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:43:12,995 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:43:12,995 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:43:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-04-17 18:43:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 18:43:12,999 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 18:43:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:12,999 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 18:43:12,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 18:43:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:12,999 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:13,000 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:13,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:13,200 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-04-17 18:43:13,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:13,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517558001] [2020-04-17 18:43:13,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517558001] [2020-04-17 18:43:13,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769334326] [2020-04-17 18:43:13,265 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:13,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:13,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:13,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:13,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:13,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:13,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728609916] [2020-04-17 18:43:13,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:13,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:13,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:13,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:13,423 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 18:43:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:13,835 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-04-17 18:43:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:13,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:13,836 INFO L225 Difference]: With dead ends: 206 [2020-04-17 18:43:13,836 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 18:43:13,837 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 18:43:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-04-17 18:43:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-04-17 18:43:13,840 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-04-17 18:43:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:13,840 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-04-17 18:43:13,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-04-17 18:43:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:13,841 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:13,841 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:14,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,041 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:14,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-04-17 18:43:14,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:14,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468983109] [2020-04-17 18:43:14,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:14,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468983109] [2020-04-17 18:43:14,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135298833] [2020-04-17 18:43:14,132 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:43:14,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:14,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:14,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:14,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:14,557 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-04-17 18:43:14,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:14,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:14,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:43:14,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871934473] [2020-04-17 18:43:14,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:14,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:14,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:43:14,964 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-04-17 18:43:15,558 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-17 18:43:15,995 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-04-17 18:43:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:22,065 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-04-17 18:43:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:43:22,073 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:43:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:22,074 INFO L225 Difference]: With dead ends: 236 [2020-04-17 18:43:22,074 INFO L226 Difference]: Without dead ends: 231 [2020-04-17 18:43:22,075 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=359, Invalid=829, Unknown=2, NotChecked=0, Total=1190 [2020-04-17 18:43:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-04-17 18:43:22,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2020-04-17 18:43:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-04-17 18:43:22,078 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-04-17 18:43:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:22,078 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-04-17 18:43:22,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-04-17 18:43:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:22,079 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:22,079 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:22,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:22,280 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:22,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-04-17 18:43:22,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:22,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571931076] [2020-04-17 18:43:22,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:22,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571931076] [2020-04-17 18:43:22,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245554371] [2020-04-17 18:43:22,355 INFO L92 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 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 [2020-04-17 18:43:22,394 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:22,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:22,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:22,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:22,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:22,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:22,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595419452] [2020-04-17 18:43:22,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:22,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:22,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:22,524 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-04-17 18:43:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:22,726 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 18:43:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:22,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:22,727 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:43:22,727 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:43:22,727 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:43:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:43:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-04-17 18:43:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-04-17 18:43:22,729 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-04-17 18:43:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:22,730 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-04-17 18:43:22,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-04-17 18:43:22,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:22,730 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:22,730 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:22,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:22,934 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:22,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:22,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-04-17 18:43:22,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:22,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695721321] [2020-04-17 18:43:22,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:23,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695721321] [2020-04-17 18:43:23,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847860466] [2020-04-17 18:43:23,005 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:23,047 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:23,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:23,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:23,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:23,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:23,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:23,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670018597] [2020-04-17 18:43:23,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:23,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:23,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:23,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:23,566 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-04-17 18:43:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:23,831 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-04-17 18:43:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:23,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:23,832 INFO L225 Difference]: With dead ends: 205 [2020-04-17 18:43:23,832 INFO L226 Difference]: Without dead ends: 203 [2020-04-17 18:43:23,833 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-04-17 18:43:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-04-17 18:43:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-04-17 18:43:23,837 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-04-17 18:43:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:23,837 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-04-17 18:43:23,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-04-17 18:43:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:23,837 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:23,837 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:24,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:24,038 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:24,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-04-17 18:43:24,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:24,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818848866] [2020-04-17 18:43:24,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:24,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818848866] [2020-04-17 18:43:24,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29671387] [2020-04-17 18:43:24,110 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:43:24,155 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:24,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:24,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:24,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:24,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:24,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:24,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320258968] [2020-04-17 18:43:24,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:24,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:24,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:24,246 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-04-17 18:43:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:24,481 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 18:43:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:24,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:24,483 INFO L225 Difference]: With dead ends: 201 [2020-04-17 18:43:24,483 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 18:43:24,483 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:24,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 18:43:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-04-17 18:43:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:43:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-04-17 18:43:24,487 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-04-17 18:43:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:24,487 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-04-17 18:43:24,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-04-17 18:43:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:24,487 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:24,487 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:24,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:24,688 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-04-17 18:43:24,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:24,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059986777] [2020-04-17 18:43:24,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:24,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059986777] [2020-04-17 18:43:24,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079174810] [2020-04-17 18:43:24,757 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:43:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:24,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:24,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:24,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:24,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:24,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391682988] [2020-04-17 18:43:24,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:24,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:24,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:24,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:24,903 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-04-17 18:43:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:25,126 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 18:43:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:25,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:25,128 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:43:25,128 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:43:25,128 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:43:25,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-04-17 18:43:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-04-17 18:43:25,132 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-04-17 18:43:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:25,132 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-04-17 18:43:25,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-04-17 18:43:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:25,132 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:25,132 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:25,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:25,333 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-04-17 18:43:25,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:25,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609247005] [2020-04-17 18:43:25,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:25,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609247005] [2020-04-17 18:43:25,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195427905] [2020-04-17 18:43:25,398 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:25,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:25,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:25,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:25,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:26,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:26,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:26,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998400015] [2020-04-17 18:43:26,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:26,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:26,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:26,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:26,084 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-04-17 18:43:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:26,375 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-04-17 18:43:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:26,375 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:26,376 INFO L225 Difference]: With dead ends: 209 [2020-04-17 18:43:26,376 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:43:26,377 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:43:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:43:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-04-17 18:43:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-04-17 18:43:26,381 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-04-17 18:43:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:26,381 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-04-17 18:43:26,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-04-17 18:43:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:26,381 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:26,381 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:26,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:26,582 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:26,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-04-17 18:43:26,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:26,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698957894] [2020-04-17 18:43:26,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:26,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698957894] [2020-04-17 18:43:26,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452006255] [2020-04-17 18:43:26,651 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:43:26,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:26,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:26,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:26,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:26,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:26,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:26,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001652502] [2020-04-17 18:43:26,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:26,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:26,798 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-04-17 18:43:27,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:27,080 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-04-17 18:43:27,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:27,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:27,081 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:27,081 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 18:43:27,081 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 18:43:27,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-04-17 18:43:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 18:43:27,085 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 18:43:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:27,085 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 18:43:27,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 18:43:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:27,085 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:27,085 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:27,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:27,286 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:27,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-04-17 18:43:27,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:27,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682125960] [2020-04-17 18:43:27,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:27,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682125960] [2020-04-17 18:43:27,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362495976] [2020-04-17 18:43:27,365 INFO L92 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 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 [2020-04-17 18:43:27,407 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:27,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:27,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:27,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:27,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:27,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:27,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31965963] [2020-04-17 18:43:27,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:27,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:27,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:27,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:27,508 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:27,778 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 18:43:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:27,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:27,779 INFO L225 Difference]: With dead ends: 201 [2020-04-17 18:43:27,779 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 18:43:27,780 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 18:43:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-04-17 18:43:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-04-17 18:43:27,784 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-04-17 18:43:27,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:27,784 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-04-17 18:43:27,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-04-17 18:43:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:27,785 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:27,785 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:27,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:27,988 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:27,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:27,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-04-17 18:43:27,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:27,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389253800] [2020-04-17 18:43:27,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:28,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389253800] [2020-04-17 18:43:28,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435238511] [2020-04-17 18:43:28,052 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:28,100 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:28,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:28,101 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:28,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:28,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:28,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:28,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533027766] [2020-04-17 18:43:28,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:28,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:28,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:28,213 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-04-17 18:43:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:28,597 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-04-17 18:43:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:43:28,598 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:28,599 INFO L225 Difference]: With dead ends: 215 [2020-04-17 18:43:28,599 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 18:43:28,599 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 18:43:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-04-17 18:43:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 18:43:28,603 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 18:43:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:28,603 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 18:43:28,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:28,603 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 18:43:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:28,604 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:28,604 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:28,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:28,807 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:28,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-04-17 18:43:28,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:28,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400930392] [2020-04-17 18:43:28,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:28,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400930392] [2020-04-17 18:43:28,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908388956] [2020-04-17 18:43:28,872 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:43:28,914 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:28,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:28,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:28,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:29,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:29,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:29,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601626256] [2020-04-17 18:43:29,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:29,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:29,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:29,006 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 18:43:29,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:29,330 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-04-17 18:43:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:29,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:29,332 INFO L225 Difference]: With dead ends: 196 [2020-04-17 18:43:29,332 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 18:43:29,333 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 18:43:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-04-17 18:43:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:29,336 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:29,336 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:29,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:29,337 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:29,337 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:29,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:29,540 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:29,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-04-17 18:43:29,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:29,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499929411] [2020-04-17 18:43:29,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:29,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499929411] [2020-04-17 18:43:29,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91303554] [2020-04-17 18:43:29,603 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:43:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:29,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:29,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:29,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:29,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:29,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:29,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963144395] [2020-04-17 18:43:29,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:29,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:29,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:29,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:29,725 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:29,988 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-04-17 18:43:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:29,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:29,989 INFO L225 Difference]: With dead ends: 191 [2020-04-17 18:43:29,989 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 18:43:29,990 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 18:43:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-04-17 18:43:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:29,995 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:29,995 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:29,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:29,996 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:29,996 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:30,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:30,199 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:30,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:30,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-04-17 18:43:30,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:30,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163835038] [2020-04-17 18:43:30,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:30,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163835038] [2020-04-17 18:43:30,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539967472] [2020-04-17 18:43:30,265 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:30,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:30,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:30,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:30,308 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:30,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:30,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:30,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:30,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442874238] [2020-04-17 18:43:30,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:30,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:30,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:30,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:30,411 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:30,874 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-04-17 18:43:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:30,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:30,876 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:43:30,876 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:43:30,877 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:43:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-04-17 18:43:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 18:43:30,881 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 18:43:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:30,881 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 18:43:30,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 18:43:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:30,881 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:30,881 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:31,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:31,082 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-04-17 18:43:31,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:31,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997867157] [2020-04-17 18:43:31,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:31,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997867157] [2020-04-17 18:43:31,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087247950] [2020-04-17 18:43:31,144 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:43:31,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:31,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:31,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:31,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:31,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:31,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:31,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223158478] [2020-04-17 18:43:31,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:31,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:31,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:31,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:31,318 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 18:43:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:31,770 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-04-17 18:43:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:43:31,770 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:31,771 INFO L225 Difference]: With dead ends: 222 [2020-04-17 18:43:31,771 INFO L226 Difference]: Without dead ends: 220 [2020-04-17 18:43:31,772 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-04-17 18:43:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-04-17 18:43:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:31,775 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:31,775 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:31,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:31,776 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:31,776 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:31,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:31,976 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:31,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-04-17 18:43:31,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:31,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067955250] [2020-04-17 18:43:31,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:32,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067955250] [2020-04-17 18:43:32,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065047103] [2020-04-17 18:43:32,041 INFO L92 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 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 [2020-04-17 18:43:32,084 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:32,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:32,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:32,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:32,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:32,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:32,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:32,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075362400] [2020-04-17 18:43:32,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:32,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:32,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:32,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-04-17 18:43:32,593 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:33,782 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-04-17 18:43:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:33,782 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:33,784 INFO L225 Difference]: With dead ends: 254 [2020-04-17 18:43:33,784 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 18:43:33,784 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=345, Invalid=776, Unknown=1, NotChecked=0, Total=1122 [2020-04-17 18:43:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 18:43:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-04-17 18:43:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 18:43:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-04-17 18:43:33,789 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-04-17 18:43:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:33,789 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-04-17 18:43:33,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-04-17 18:43:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:33,790 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:33,790 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:33,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:33,990 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:33,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-04-17 18:43:33,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:33,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164367524] [2020-04-17 18:43:33,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:34,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164367524] [2020-04-17 18:43:34,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467249287] [2020-04-17 18:43:34,055 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:34,099 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:34,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:34,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:34,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:34,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:34,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:34,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:43:34,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235790878] [2020-04-17 18:43:34,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:34,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:34,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:34,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:43:34,807 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 16 states. [2020-04-17 18:43:35,754 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 18:43:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:45,815 INFO L93 Difference]: Finished difference Result 263 states and 613 transitions. [2020-04-17 18:43:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:43:45,815 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:43:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:45,816 INFO L225 Difference]: With dead ends: 263 [2020-04-17 18:43:45,817 INFO L226 Difference]: Without dead ends: 256 [2020-04-17 18:43:45,817 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=433, Invalid=1043, Unknown=6, NotChecked=0, Total=1482 [2020-04-17 18:43:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-04-17 18:43:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 151. [2020-04-17 18:43:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-04-17 18:43:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-04-17 18:43:45,822 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-04-17 18:43:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:45,822 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-04-17 18:43:45,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-04-17 18:43:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:45,823 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:45,823 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:46,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:46,026 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:46,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-04-17 18:43:46,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:46,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313644017] [2020-04-17 18:43:46,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313644017] [2020-04-17 18:43:46,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801049691] [2020-04-17 18:43:46,089 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:43:46,127 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:46,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:46,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:46,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:46,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:46,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348967986] [2020-04-17 18:43:46,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:46,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:46,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:46,228 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 15 states. [2020-04-17 18:43:46,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:46,558 INFO L93 Difference]: Finished difference Result 218 states and 514 transitions. [2020-04-17 18:43:46,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:46,558 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:46,559 INFO L225 Difference]: With dead ends: 218 [2020-04-17 18:43:46,559 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 18:43:46,560 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 18:43:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2020-04-17 18:43:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 18:43:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 375 transitions. [2020-04-17 18:43:46,563 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 375 transitions. Word has length 13 [2020-04-17 18:43:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:46,563 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 375 transitions. [2020-04-17 18:43:46,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 375 transitions. [2020-04-17 18:43:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:46,563 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:46,564 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:46,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:46,764 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-04-17 18:43:46,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:46,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079844305] [2020-04-17 18:43:46,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079844305] [2020-04-17 18:43:46,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623925585] [2020-04-17 18:43:46,832 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:43:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:46,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:46,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:46,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:46,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046004329] [2020-04-17 18:43:46,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:46,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:46,958 INFO L87 Difference]: Start difference. First operand 148 states and 375 transitions. Second operand 15 states. [2020-04-17 18:43:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:47,398 INFO L93 Difference]: Finished difference Result 224 states and 533 transitions. [2020-04-17 18:43:47,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:47,399 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:47,400 INFO L225 Difference]: With dead ends: 224 [2020-04-17 18:43:47,400 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 18:43:47,400 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:43:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 18:43:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 149. [2020-04-17 18:43:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-04-17 18:43:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 379 transitions. [2020-04-17 18:43:47,404 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 379 transitions. Word has length 13 [2020-04-17 18:43:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:47,404 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 379 transitions. [2020-04-17 18:43:47,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 379 transitions. [2020-04-17 18:43:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:47,405 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:47,405 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:47,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:47,606 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:47,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:47,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-04-17 18:43:47,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:47,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645064140] [2020-04-17 18:43:47,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:47,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645064140] [2020-04-17 18:43:47,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623324095] [2020-04-17 18:43:47,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:47,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:47,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:47,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:47,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:47,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:47,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:47,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:47,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476217000] [2020-04-17 18:43:47,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:47,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:47,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:47,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:47,801 INFO L87 Difference]: Start difference. First operand 149 states and 379 transitions. Second operand 15 states. [2020-04-17 18:43:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:48,308 INFO L93 Difference]: Finished difference Result 246 states and 594 transitions. [2020-04-17 18:43:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:48,308 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:48,309 INFO L225 Difference]: With dead ends: 246 [2020-04-17 18:43:48,309 INFO L226 Difference]: Without dead ends: 238 [2020-04-17 18:43:48,309 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-04-17 18:43:48,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 149. [2020-04-17 18:43:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-04-17 18:43:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 379 transitions. [2020-04-17 18:43:48,311 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 379 transitions. Word has length 13 [2020-04-17 18:43:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:48,312 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 379 transitions. [2020-04-17 18:43:48,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 379 transitions. [2020-04-17 18:43:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:48,312 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:48,312 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:48,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:48,513 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:48,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:48,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-04-17 18:43:48,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:48,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801442842] [2020-04-17 18:43:48,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:48,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801442842] [2020-04-17 18:43:48,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063587264] [2020-04-17 18:43:48,608 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:48,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:48,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:48,651 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:48,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:48,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:48,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:48,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:48,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409087827] [2020-04-17 18:43:48,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:48,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:48,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:48,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:48,732 INFO L87 Difference]: Start difference. First operand 149 states and 379 transitions. Second operand 15 states. [2020-04-17 18:43:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:49,253 INFO L93 Difference]: Finished difference Result 250 states and 602 transitions. [2020-04-17 18:43:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:49,253 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:49,255 INFO L225 Difference]: With dead ends: 250 [2020-04-17 18:43:49,255 INFO L226 Difference]: Without dead ends: 241 [2020-04-17 18:43:49,255 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-04-17 18:43:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 133. [2020-04-17 18:43:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-04-17 18:43:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-04-17 18:43:49,259 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-04-17 18:43:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:49,259 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-04-17 18:43:49,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-04-17 18:43:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:49,260 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:49,260 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:49,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:49,463 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-04-17 18:43:49,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:49,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583387964] [2020-04-17 18:43:49,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:49,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583387964] [2020-04-17 18:43:49,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880876114] [2020-04-17 18:43:49,526 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:49,567 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:49,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:49,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:49,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:49,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:49,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:49,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:49,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284032872] [2020-04-17 18:43:49,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:49,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:49,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:49,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:49,650 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-04-17 18:43:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:50,145 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-04-17 18:43:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:43:50,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:50,147 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:43:50,147 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 18:43:50,147 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:43:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 18:43:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-04-17 18:43:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 18:43:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-04-17 18:43:50,150 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-04-17 18:43:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:50,151 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-04-17 18:43:50,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-04-17 18:43:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:50,151 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:50,151 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:50,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:50,352 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:50,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-04-17 18:43:50,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:50,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949390735] [2020-04-17 18:43:50,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:50,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949390735] [2020-04-17 18:43:50,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873855551] [2020-04-17 18:43:50,442 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:43:50,488 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:43:50,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:50,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:50,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:50,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:50,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:50,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:43:50,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59052968] [2020-04-17 18:43:50,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:43:50,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:43:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:43:50,667 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-04-17 18:43:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:50,946 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-04-17 18:43:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:43:50,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-04-17 18:43:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:50,948 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:43:50,949 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 18:43:50,949 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 18:43:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-04-17 18:43:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 18:43:50,953 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 18:43:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:50,953 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 18:43:50,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:43:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 18:43:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:50,954 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:50,955 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:51,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:51,159 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-04-17 18:43:51,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:51,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214103237] [2020-04-17 18:43:51,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:51,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214103237] [2020-04-17 18:43:51,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750364180] [2020-04-17 18:43:51,362 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:43:51,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:43:51,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:51,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:51,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:51,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:51,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:51,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717901871] [2020-04-17 18:43:51,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:51,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:51,600 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-04-17 18:43:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:51,650 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-04-17 18:43:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:43:51,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:43:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:51,652 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:43:51,652 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:43:51,652 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:43:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-04-17 18:43:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 18:43:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-04-17 18:43:51,655 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-04-17 18:43:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:51,655 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-04-17 18:43:51,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-04-17 18:43:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:51,656 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:51,656 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:51,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:51,859 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:51,860 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-04-17 18:43:51,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:51,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752493961] [2020-04-17 18:43:51,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:51,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752493961] [2020-04-17 18:43:51,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720717524] [2020-04-17 18:43:51,978 INFO L92 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 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 [2020-04-17 18:43:52,020 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:52,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:52,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:52,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:52,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:52,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:52,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692324787] [2020-04-17 18:43:52,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:52,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:52,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:52,156 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-04-17 18:43:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:52,233 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-04-17 18:43:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:43:52,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:43:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:52,234 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:43:52,235 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 18:43:52,235 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:43:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 18:43:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-04-17 18:43:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 18:43:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-04-17 18:43:52,238 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-04-17 18:43:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:52,238 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-04-17 18:43:52,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:52,238 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-04-17 18:43:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:52,239 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:52,239 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:52,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:52,440 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:52,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-04-17 18:43:52,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:52,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260869290] [2020-04-17 18:43:52,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:52,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260869290] [2020-04-17 18:43:52,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023972849] [2020-04-17 18:43:52,581 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:52,659 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:43:52,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:52,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:52,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:52,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:52,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:52,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099402557] [2020-04-17 18:43:52,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:52,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:52,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:52,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:52,835 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-04-17 18:43:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:52,921 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-04-17 18:43:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:43:52,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:43:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:52,922 INFO L225 Difference]: With dead ends: 196 [2020-04-17 18:43:52,922 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:43:52,923 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:43:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:43:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-04-17 18:43:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-04-17 18:43:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-04-17 18:43:52,926 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-04-17 18:43:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:52,926 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-04-17 18:43:52,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-04-17 18:43:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:52,926 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:52,926 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:53,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:53,127 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:53,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:53,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-04-17 18:43:53,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:53,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482417766] [2020-04-17 18:43:53,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:53,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482417766] [2020-04-17 18:43:53,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96592909] [2020-04-17 18:43:53,228 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:43:53,279 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:43:53,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:53,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:53,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:53,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:53,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:53,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73682980] [2020-04-17 18:43:53,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:53,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:53,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:53,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:53,396 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-04-17 18:43:53,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:53,513 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 18:43:53,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:43:53,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:43:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:53,514 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:43:53,514 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:43:53,514 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:43:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:43:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-04-17 18:43:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-04-17 18:43:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-04-17 18:43:53,518 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-04-17 18:43:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:53,518 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-04-17 18:43:53,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-04-17 18:43:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:53,518 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:53,518 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:53,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:53,719 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:53,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-04-17 18:43:53,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:53,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788923188] [2020-04-17 18:43:53,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:53,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788923188] [2020-04-17 18:43:53,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538061276] [2020-04-17 18:43:53,806 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:43:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:53,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:53,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:53,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:53,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:53,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58098135] [2020-04-17 18:43:53,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:53,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:53,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:53,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:53,974 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-04-17 18:43:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:54,121 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-04-17 18:43:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:43:54,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:43:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:54,122 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:43:54,122 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 18:43:54,123 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:43:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 18:43:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-04-17 18:43:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-04-17 18:43:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-04-17 18:43:54,127 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-04-17 18:43:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:54,127 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-04-17 18:43:54,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-04-17 18:43:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:54,128 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:54,128 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:54,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:54,331 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:54,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-04-17 18:43:54,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:54,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967019973] [2020-04-17 18:43:54,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:54,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967019973] [2020-04-17 18:43:54,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884853373] [2020-04-17 18:43:54,414 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:43:54,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:54,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:54,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:54,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:54,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:54,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:54,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462855339] [2020-04-17 18:43:54,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:54,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:54,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:54,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:54,577 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-04-17 18:43:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:54,761 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-04-17 18:43:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:54,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:43:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:54,762 INFO L225 Difference]: With dead ends: 193 [2020-04-17 18:43:54,762 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 18:43:54,763 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 18:43:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-04-17 18:43:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-04-17 18:43:54,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-04-17 18:43:54,766 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-04-17 18:43:54,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:54,766 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-04-17 18:43:54,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-04-17 18:43:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:54,767 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:54,768 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:54,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:54,971 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:54,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:54,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-04-17 18:43:54,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:54,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004240022] [2020-04-17 18:43:54,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:55,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004240022] [2020-04-17 18:43:55,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916301328] [2020-04-17 18:43:55,069 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:43:55,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:43:55,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:55,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:55,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:55,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:55,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:55,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:55,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482296437] [2020-04-17 18:43:55,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:55,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:55,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:55,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:55,229 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-04-17 18:43:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:55,454 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 18:43:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:43:55,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 18:43:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:55,456 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:55,456 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:43:55,456 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:43:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:43:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-04-17 18:43:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-04-17 18:43:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-04-17 18:43:55,459 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-04-17 18:43:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:55,459 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-04-17 18:43:55,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-04-17 18:43:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:55,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:55,460 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:55,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:55,661 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-04-17 18:43:55,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:55,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137077420] [2020-04-17 18:43:55,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:55,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137077420] [2020-04-17 18:43:55,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366011309] [2020-04-17 18:43:55,772 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:55,817 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:55,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:55,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:55,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:55,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:55,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:55,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825778541] [2020-04-17 18:43:55,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:55,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:55,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:55,962 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-04-17 18:43:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:56,029 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-04-17 18:43:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:43:56,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:43:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:56,031 INFO L225 Difference]: With dead ends: 188 [2020-04-17 18:43:56,031 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 18:43:56,031 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 18:43:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-04-17 18:43:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 18:43:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-04-17 18:43:56,034 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-04-17 18:43:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:56,034 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-04-17 18:43:56,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-04-17 18:43:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:56,035 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:56,035 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:56,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:56,235 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:56,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:56,236 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-04-17 18:43:56,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:56,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728124735] [2020-04-17 18:43:56,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:56,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728124735] [2020-04-17 18:43:56,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555610029] [2020-04-17 18:43:56,324 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:43:56,370 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:56,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:56,371 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:56,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:56,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:56,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:56,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927385694] [2020-04-17 18:43:56,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:56,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:56,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:56,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:56,507 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-04-17 18:43:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:56,694 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-04-17 18:43:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:43:56,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:43:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:56,695 INFO L225 Difference]: With dead ends: 199 [2020-04-17 18:43:56,695 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 18:43:56,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 18:43:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-04-17 18:43:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-04-17 18:43:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-04-17 18:43:56,699 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-04-17 18:43:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:56,699 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-04-17 18:43:56,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-04-17 18:43:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:56,699 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:56,699 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:56,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:56,900 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:56,901 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-04-17 18:43:56,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:56,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805783237] [2020-04-17 18:43:56,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:57,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805783237] [2020-04-17 18:43:57,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518286299] [2020-04-17 18:43:57,030 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:43:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:57,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:57,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:58,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:58,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:58,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324095145] [2020-04-17 18:43:58,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:58,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:58,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:58,007 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-04-17 18:43:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:58,232 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-04-17 18:43:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:43:58,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:43:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:58,234 INFO L225 Difference]: With dead ends: 210 [2020-04-17 18:43:58,234 INFO L226 Difference]: Without dead ends: 208 [2020-04-17 18:43:58,234 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-04-17 18:43:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-04-17 18:43:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-04-17 18:43:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-04-17 18:43:58,238 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-04-17 18:43:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:58,238 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-04-17 18:43:58,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-04-17 18:43:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:58,238 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:58,238 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:58,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:58,439 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-04-17 18:43:58,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:58,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510592442] [2020-04-17 18:43:58,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:58,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510592442] [2020-04-17 18:43:58,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636789336] [2020-04-17 18:43:58,554 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:58,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:58,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:58,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:58,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:01,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:01,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:44:01,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453484475] [2020-04-17 18:44:01,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:44:01,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:01,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:44:01,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=204, Unknown=3, NotChecked=0, Total=306 [2020-04-17 18:44:01,217 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 18 states. [2020-04-17 18:44:01,908 WARN L192 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 18:44:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:04,570 INFO L93 Difference]: Finished difference Result 214 states and 508 transitions. [2020-04-17 18:44:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:04,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:44:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:04,572 INFO L225 Difference]: With dead ends: 214 [2020-04-17 18:44:04,572 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:44:04,572 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=209, Invalid=388, Unknown=3, NotChecked=0, Total=600 [2020-04-17 18:44:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:44:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 157. [2020-04-17 18:44:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-04-17 18:44:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-04-17 18:44:04,576 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-04-17 18:44:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:04,577 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-04-17 18:44:04,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:44:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-04-17 18:44:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:04,577 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:04,578 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:04,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:04,781 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:04,781 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-04-17 18:44:04,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:04,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468277179] [2020-04-17 18:44:04,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:04,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468277179] [2020-04-17 18:44:04,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365622143] [2020-04-17 18:44:04,867 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:44:04,905 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:44:04,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:04,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:04,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:05,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:05,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:05,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828938754] [2020-04-17 18:44:05,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:05,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:05,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:05,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:05,069 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-04-17 18:44:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:05,336 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-04-17 18:44:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:05,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:05,338 INFO L225 Difference]: With dead ends: 218 [2020-04-17 18:44:05,338 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 18:44:05,338 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 18:44:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-04-17 18:44:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 18:44:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 18:44:05,342 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 18:44:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:05,342 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 18:44:05,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 18:44:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:05,342 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:05,342 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:05,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:05,543 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:05,544 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-04-17 18:44:05,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:05,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082386039] [2020-04-17 18:44:05,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:05,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082386039] [2020-04-17 18:44:05,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436000647] [2020-04-17 18:44:05,629 INFO L92 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 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 [2020-04-17 18:44:05,669 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:05,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:05,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:05,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:15,958 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 18:44:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:15,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:15,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:44:15,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213558855] [2020-04-17 18:44:15,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:44:15,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:15,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:44:15,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=206, Unknown=4, NotChecked=0, Total=306 [2020-04-17 18:44:15,962 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 18 states. [2020-04-17 18:44:18,304 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 18:44:22,531 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2020-04-17 18:44:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:32,606 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-04-17 18:44:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:44:32,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:44:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:32,607 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:44:32,607 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:44:32,608 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=209, Invalid=387, Unknown=4, NotChecked=0, Total=600 [2020-04-17 18:44:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:44:32,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 153. [2020-04-17 18:44:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-04-17 18:44:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-04-17 18:44:32,611 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-04-17 18:44:32,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:32,611 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-04-17 18:44:32,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:44:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-04-17 18:44:32,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:32,612 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:32,612 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:32,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:32,816 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:32,816 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-04-17 18:44:32,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:32,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353522221] [2020-04-17 18:44:32,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:32,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353522221] [2020-04-17 18:44:32,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812728617] [2020-04-17 18:44:32,908 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:32,948 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:32,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:32,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:32,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:33,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:33,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:33,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910493219] [2020-04-17 18:44:33,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:33,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:33,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:33,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:33,083 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-04-17 18:44:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:33,357 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-04-17 18:44:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:44:33,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:33,358 INFO L225 Difference]: With dead ends: 212 [2020-04-17 18:44:33,358 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 18:44:33,359 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:33,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 18:44:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-04-17 18:44:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 18:44:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 18:44:33,362 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 18:44:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:33,362 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 18:44:33,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 18:44:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:33,363 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:33,363 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:33,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:33,563 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:33,564 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-04-17 18:44:33,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:33,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910807979] [2020-04-17 18:44:33,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:33,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910807979] [2020-04-17 18:44:33,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927772770] [2020-04-17 18:44:33,655 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:44:33,695 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:44:33,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:33,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:33,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:34,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:34,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:34,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809687112] [2020-04-17 18:44:34,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:34,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:34,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:34,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:34,196 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 18:44:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:34,474 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-04-17 18:44:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:34,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:34,476 INFO L225 Difference]: With dead ends: 224 [2020-04-17 18:44:34,476 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 18:44:34,476 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 18:44:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-04-17 18:44:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 18:44:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 18:44:34,480 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 18:44:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:34,480 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 18:44:34,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 18:44:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:34,481 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:34,481 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:34,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:34,685 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:34,685 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-04-17 18:44:34,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:34,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692708310] [2020-04-17 18:44:34,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:34,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692708310] [2020-04-17 18:44:34,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826945726] [2020-04-17 18:44:34,803 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:44:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:34,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:34,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:35,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:35,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:35,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937858572] [2020-04-17 18:44:35,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:35,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:35,075 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 18:44:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:35,413 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-04-17 18:44:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:35,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:35,414 INFO L225 Difference]: With dead ends: 218 [2020-04-17 18:44:35,414 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 18:44:35,414 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:44:35,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 18:44:35,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-04-17 18:44:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 18:44:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 18:44:35,417 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 18:44:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:35,417 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 18:44:35,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 18:44:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:35,418 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:35,418 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:35,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:35,621 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:35,622 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-04-17 18:44:35,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:35,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651436298] [2020-04-17 18:44:35,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:35,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651436298] [2020-04-17 18:44:35,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207247003] [2020-04-17 18:44:35,707 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:44:35,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:35,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:35,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:35,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:35,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:35,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:35,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396358269] [2020-04-17 18:44:35,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:35,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:35,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:35,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:35,872 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 18:44:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:36,111 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-04-17 18:44:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:36,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:36,112 INFO L225 Difference]: With dead ends: 206 [2020-04-17 18:44:36,112 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 18:44:36,112 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 18:44:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-04-17 18:44:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-04-17 18:44:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-04-17 18:44:36,116 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-04-17 18:44:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:36,116 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-04-17 18:44:36,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-04-17 18:44:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:36,116 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:36,116 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:36,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:36,317 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:36,318 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-04-17 18:44:36,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:36,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434780951] [2020-04-17 18:44:36,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:36,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434780951] [2020-04-17 18:44:36,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156395105] [2020-04-17 18:44:36,414 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:44:36,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:44:36,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:36,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:36,466 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:36,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:36,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:36,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655904803] [2020-04-17 18:44:36,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:36,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:36,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:36,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:36,592 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-04-17 18:44:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:36,811 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-04-17 18:44:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:36,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:36,811 INFO L225 Difference]: With dead ends: 207 [2020-04-17 18:44:36,811 INFO L226 Difference]: Without dead ends: 205 [2020-04-17 18:44:36,812 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-04-17 18:44:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-04-17 18:44:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 18:44:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-04-17 18:44:36,815 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-04-17 18:44:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:36,815 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-04-17 18:44:36,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-04-17 18:44:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:36,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:36,815 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:37,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:37,016 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:37,016 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-04-17 18:44:37,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:37,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671508389] [2020-04-17 18:44:37,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:37,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671508389] [2020-04-17 18:44:37,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929374697] [2020-04-17 18:44:37,107 INFO L92 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 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 [2020-04-17 18:44:37,148 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:37,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:37,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:37,150 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:38,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:38,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:38,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600192462] [2020-04-17 18:44:38,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:38,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:38,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:38,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:38,205 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-04-17 18:44:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:38,447 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-04-17 18:44:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:38,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:38,448 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:44:38,448 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:44:38,449 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:44:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-04-17 18:44:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-04-17 18:44:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-04-17 18:44:38,452 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-04-17 18:44:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:38,453 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-04-17 18:44:38,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-04-17 18:44:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:38,453 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:38,453 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:38,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:38,654 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:38,655 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-04-17 18:44:38,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:38,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9537668] [2020-04-17 18:44:38,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:38,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9537668] [2020-04-17 18:44:38,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35111131] [2020-04-17 18:44:38,763 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:44:38,821 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:38,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:38,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:38,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:45,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:45,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:45,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086061294] [2020-04-17 18:44:45,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:45,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:45,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:45,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=190, Unknown=1, NotChecked=0, Total=272 [2020-04-17 18:44:45,512 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-04-17 18:44:45,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:45,851 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-04-17 18:44:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:45,852 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:45,852 INFO L225 Difference]: With dead ends: 223 [2020-04-17 18:44:45,853 INFO L226 Difference]: Without dead ends: 221 [2020-04-17 18:44:45,853 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=197, Invalid=402, Unknown=1, NotChecked=0, Total=600 [2020-04-17 18:44:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-04-17 18:44:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-04-17 18:44:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 18:44:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-04-17 18:44:45,857 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-04-17 18:44:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:45,858 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-04-17 18:44:45,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-04-17 18:44:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:45,858 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:45,858 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:46,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:46,059 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:46,060 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-04-17 18:44:46,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:46,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520110080] [2020-04-17 18:44:46,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:46,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520110080] [2020-04-17 18:44:46,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220791329] [2020-04-17 18:44:46,154 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:44:46,198 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:44:46,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:46,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:46,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:46,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:46,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:46,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608678108] [2020-04-17 18:44:46,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:46,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:46,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:46,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:46,317 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-04-17 18:44:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:46,574 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-04-17 18:44:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:46,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:46,575 INFO L225 Difference]: With dead ends: 225 [2020-04-17 18:44:46,575 INFO L226 Difference]: Without dead ends: 223 [2020-04-17 18:44:46,576 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:44:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-04-17 18:44:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-04-17 18:44:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-04-17 18:44:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-04-17 18:44:46,579 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-04-17 18:44:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:46,579 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-04-17 18:44:46,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:46,579 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-04-17 18:44:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:46,579 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:46,580 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:46,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:46,780 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:46,781 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-04-17 18:44:46,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:46,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739474007] [2020-04-17 18:44:46,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:46,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739474007] [2020-04-17 18:44:46,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040791893] [2020-04-17 18:44:46,892 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:44:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:46,934 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:46,934 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:47,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:47,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:47,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838759958] [2020-04-17 18:44:47,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:47,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:47,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:47,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:47,061 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-04-17 18:44:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:47,303 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-04-17 18:44:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:47,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:47,304 INFO L225 Difference]: With dead ends: 214 [2020-04-17 18:44:47,304 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:44:47,305 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:44:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-04-17 18:44:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-04-17 18:44:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-04-17 18:44:47,308 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-04-17 18:44:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:47,308 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-04-17 18:44:47,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-04-17 18:44:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:47,308 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:47,308 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:47,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:47,509 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:47,510 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-04-17 18:44:47,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:47,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913962546] [2020-04-17 18:44:47,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:47,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913962546] [2020-04-17 18:44:47,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659816142] [2020-04-17 18:44:47,632 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:44:47,673 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:47,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:47,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:47,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:47,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:47,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:47,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305143353] [2020-04-17 18:44:47,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:47,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:47,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:47,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:47,808 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-04-17 18:44:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:47,994 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-04-17 18:44:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:44:47,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:47,995 INFO L225 Difference]: With dead ends: 203 [2020-04-17 18:44:47,995 INFO L226 Difference]: Without dead ends: 201 [2020-04-17 18:44:47,995 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:44:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-04-17 18:44:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-04-17 18:44:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-04-17 18:44:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-04-17 18:44:47,998 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-04-17 18:44:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:47,998 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-04-17 18:44:47,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-04-17 18:44:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:47,999 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:47,999 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:48,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:48,202 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:48,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-04-17 18:44:48,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:48,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657927957] [2020-04-17 18:44:48,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:48,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657927957] [2020-04-17 18:44:48,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257962181] [2020-04-17 18:44:48,333 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:44:48,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:44:48,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:48,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:48,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:48,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:48,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:48,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550690343] [2020-04-17 18:44:48,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:48,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:48,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:48,501 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-04-17 18:44:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:48,581 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-04-17 18:44:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:44:48,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:48,582 INFO L225 Difference]: With dead ends: 212 [2020-04-17 18:44:48,583 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 18:44:48,583 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:44:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 18:44:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-04-17 18:44:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-04-17 18:44:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-04-17 18:44:48,587 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-04-17 18:44:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:48,587 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-04-17 18:44:48,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-04-17 18:44:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:48,588 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:48,588 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:48,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:48,788 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-04-17 18:44:48,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:48,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758980754] [2020-04-17 18:44:48,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:48,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758980754] [2020-04-17 18:44:48,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496354299] [2020-04-17 18:44:48,902 INFO L92 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 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 [2020-04-17 18:44:48,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:48,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:48,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:48,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:49,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:49,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:49,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099270933] [2020-04-17 18:44:49,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:49,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:49,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:49,116 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-04-17 18:44:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:49,329 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-04-17 18:44:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:49,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:49,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:49,330 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:44:49,331 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:44:49,331 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:44:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:44:49,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-04-17 18:44:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 18:44:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-04-17 18:44:49,334 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-04-17 18:44:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:49,335 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-04-17 18:44:49,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-04-17 18:44:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:49,336 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:49,336 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:49,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:49,539 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:49,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:49,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-04-17 18:44:49,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:49,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459809708] [2020-04-17 18:44:49,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:49,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459809708] [2020-04-17 18:44:49,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307889852] [2020-04-17 18:44:49,669 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:44:49,723 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:49,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:49,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:49,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:57,187 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 18:44:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:57,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:57,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:44:57,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530622450] [2020-04-17 18:44:57,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:44:57,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:44:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=216, Unknown=3, NotChecked=0, Total=306 [2020-04-17 18:44:57,190 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 18 states. [2020-04-17 18:44:59,434 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 18:45:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:07,027 INFO L93 Difference]: Finished difference Result 237 states and 555 transitions. [2020-04-17 18:45:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:45:07,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:45:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:07,028 INFO L225 Difference]: With dead ends: 237 [2020-04-17 18:45:07,029 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 18:45:07,029 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=198, Invalid=399, Unknown=3, NotChecked=0, Total=600 [2020-04-17 18:45:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 18:45:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 162. [2020-04-17 18:45:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 18:45:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-04-17 18:45:07,032 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-04-17 18:45:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:07,032 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-04-17 18:45:07,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:45:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-04-17 18:45:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:07,032 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:07,032 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:07,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:07,233 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-04-17 18:45:07,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:07,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55548868] [2020-04-17 18:45:07,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:07,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55548868] [2020-04-17 18:45:07,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117464392] [2020-04-17 18:45:07,326 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:45:07,368 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:07,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:07,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:07,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:17,644 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 18:45:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:17,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:17,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:45:17,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310942736] [2020-04-17 18:45:17,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:45:17,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:17,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:45:17,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=218, Unknown=4, NotChecked=0, Total=306 [2020-04-17 18:45:17,646 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 18 states. [2020-04-17 18:45:19,896 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 18:45:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:28,135 INFO L93 Difference]: Finished difference Result 235 states and 549 transitions. [2020-04-17 18:45:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:28,136 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:45:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:28,136 INFO L225 Difference]: With dead ends: 235 [2020-04-17 18:45:28,136 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 18:45:28,137 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=227, Invalid=471, Unknown=4, NotChecked=0, Total=702 [2020-04-17 18:45:28,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 18:45:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-04-17 18:45:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 18:45:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-04-17 18:45:28,141 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-04-17 18:45:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:28,141 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-04-17 18:45:28,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:45:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-04-17 18:45:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:28,142 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:28,142 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:28,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:28,346 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-04-17 18:45:28,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:28,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405071661] [2020-04-17 18:45:28,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:28,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405071661] [2020-04-17 18:45:28,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617317230] [2020-04-17 18:45:28,440 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:45:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:28,483 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:28,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:28,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:28,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:28,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833823624] [2020-04-17 18:45:28,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:28,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:28,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:28,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:28,637 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-04-17 18:45:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:28,973 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-04-17 18:45:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:28,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:28,975 INFO L225 Difference]: With dead ends: 237 [2020-04-17 18:45:28,975 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 18:45:28,975 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:45:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 18:45:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-04-17 18:45:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 18:45:28,979 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 18:45:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:28,980 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 18:45:28,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 18:45:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:28,980 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:28,981 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:29,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:29,184 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-04-17 18:45:29,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:29,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911168857] [2020-04-17 18:45:29,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:29,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911168857] [2020-04-17 18:45:29,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609842650] [2020-04-17 18:45:29,293 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:45:29,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:29,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:29,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:29,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:29,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:29,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:29,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877342477] [2020-04-17 18:45:29,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:29,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:29,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:29,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:29,499 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 18:45:29,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:29,867 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-04-17 18:45:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:29,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:29,869 INFO L225 Difference]: With dead ends: 229 [2020-04-17 18:45:29,869 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:45:29,869 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:45:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:45:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-04-17 18:45:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-04-17 18:45:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-04-17 18:45:29,873 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-04-17 18:45:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:29,873 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-04-17 18:45:29,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-04-17 18:45:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:29,874 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:29,874 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:30,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:30,077 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:30,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-04-17 18:45:30,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:30,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491098386] [2020-04-17 18:45:30,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:30,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491098386] [2020-04-17 18:45:30,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068446851] [2020-04-17 18:45:30,165 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:45:30,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:45:30,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:30,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:30,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:30,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:30,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:30,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457698382] [2020-04-17 18:45:30,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:30,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:30,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:30,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:30,347 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-04-17 18:45:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:30,702 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-04-17 18:45:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:45:30,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:30,703 INFO L225 Difference]: With dead ends: 225 [2020-04-17 18:45:30,703 INFO L226 Difference]: Without dead ends: 223 [2020-04-17 18:45:30,703 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:45:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-04-17 18:45:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-04-17 18:45:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 18:45:30,707 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 18:45:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:30,707 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 18:45:30,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 18:45:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:30,707 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:30,707 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:30,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:30,908 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:30,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-04-17 18:45:30,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:30,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188225440] [2020-04-17 18:45:30,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:30,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188225440] [2020-04-17 18:45:30,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831852448] [2020-04-17 18:45:30,999 INFO L92 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 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 [2020-04-17 18:45:31,040 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:45:31,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:31,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:31,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:31,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:31,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:31,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975668849] [2020-04-17 18:45:31,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:31,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:31,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:31,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:31,513 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 18:45:31,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:31,889 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-04-17 18:45:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:45:31,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:31,891 INFO L225 Difference]: With dead ends: 239 [2020-04-17 18:45:31,891 INFO L226 Difference]: Without dead ends: 237 [2020-04-17 18:45:31,891 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:45:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-04-17 18:45:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-04-17 18:45:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 18:45:31,895 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 18:45:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:31,895 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 18:45:31,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 18:45:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:31,895 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:31,896 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:32,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:32,096 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:32,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:32,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-04-17 18:45:32,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:32,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88537388] [2020-04-17 18:45:32,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:32,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88537388] [2020-04-17 18:45:32,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230075450] [2020-04-17 18:45:32,183 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:45:32,224 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:45:32,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:32,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:32,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:32,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:32,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:32,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205577911] [2020-04-17 18:45:32,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:32,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:32,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:32,345 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 18:45:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:32,648 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-04-17 18:45:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:45:32,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:32,649 INFO L225 Difference]: With dead ends: 234 [2020-04-17 18:45:32,649 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 18:45:32,650 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:45:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 18:45:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-04-17 18:45:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 18:45:32,653 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 18:45:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:32,653 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 18:45:32,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 18:45:32,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:32,654 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:32,654 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:32,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:32,857 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-04-17 18:45:32,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:32,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442464904] [2020-04-17 18:45:32,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:32,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442464904] [2020-04-17 18:45:32,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759375731] [2020-04-17 18:45:32,942 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:45:32,983 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:32,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:32,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:32,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:33,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:33,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:33,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190333678] [2020-04-17 18:45:33,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:33,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:33,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:33,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:33,132 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 18:45:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:33,489 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-04-17 18:45:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:33,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:33,490 INFO L225 Difference]: With dead ends: 218 [2020-04-17 18:45:33,490 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 18:45:33,491 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:45:33,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 18:45:33,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-04-17 18:45:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 18:45:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-04-17 18:45:33,496 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-04-17 18:45:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:33,496 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-04-17 18:45:33,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:33,497 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-04-17 18:45:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:33,498 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:33,498 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:33,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:33,702 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:33,703 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-04-17 18:45:33,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:33,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573678974] [2020-04-17 18:45:33,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:33,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573678974] [2020-04-17 18:45:33,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846434069] [2020-04-17 18:45:33,829 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:45:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:33,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:33,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:34,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:34,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:34,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014268245] [2020-04-17 18:45:34,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:34,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:34,006 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-04-17 18:45:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:34,117 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-04-17 18:45:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:45:34,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:34,118 INFO L225 Difference]: With dead ends: 208 [2020-04-17 18:45:34,118 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 18:45:34,118 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:45:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 18:45:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-04-17 18:45:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-04-17 18:45:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-04-17 18:45:34,122 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-04-17 18:45:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:34,122 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-04-17 18:45:34,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-04-17 18:45:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:34,122 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:34,123 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:34,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:34,323 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:34,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:34,324 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-04-17 18:45:34,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:34,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646779534] [2020-04-17 18:45:34,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:34,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646779534] [2020-04-17 18:45:34,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49755394] [2020-04-17 18:45:34,426 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:45:34,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:34,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:34,470 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:34,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:34,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:34,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:34,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387941504] [2020-04-17 18:45:34,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:34,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:34,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:34,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:34,608 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-04-17 18:45:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:34,849 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-04-17 18:45:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:45:34,850 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:34,851 INFO L225 Difference]: With dead ends: 229 [2020-04-17 18:45:34,851 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:45:34,851 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:45:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:45:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-04-17 18:45:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-04-17 18:45:34,855 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-04-17 18:45:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:34,855 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-04-17 18:45:34,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-04-17 18:45:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:34,855 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:34,856 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:35,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:35,056 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-04-17 18:45:35,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:35,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098537503] [2020-04-17 18:45:35,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:35,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098537503] [2020-04-17 18:45:35,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596516102] [2020-04-17 18:45:35,151 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:45:35,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:45:35,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:35,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:35,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:36,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:36,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:36,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557013231] [2020-04-17 18:45:36,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:36,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:36,134 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-04-17 18:45:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:36,415 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-04-17 18:45:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:45:36,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:36,416 INFO L225 Difference]: With dead ends: 235 [2020-04-17 18:45:36,416 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 18:45:36,416 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:45:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 18:45:36,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-04-17 18:45:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-04-17 18:45:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-04-17 18:45:36,420 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-04-17 18:45:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:36,420 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-04-17 18:45:36,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-04-17 18:45:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:36,421 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:36,421 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:36,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:36,624 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-04-17 18:45:36,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:36,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016246085] [2020-04-17 18:45:36,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:36,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016246085] [2020-04-17 18:45:36,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009198575] [2020-04-17 18:45:36,713 INFO L92 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 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 [2020-04-17 18:45:36,756 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:45:36,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:36,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:36,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:47,031 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 18:45:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:47,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:47,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:45:47,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453038109] [2020-04-17 18:45:47,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:45:47,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:47,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:45:47,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=229, Unknown=4, NotChecked=0, Total=306 [2020-04-17 18:45:47,033 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 18 states. [2020-04-17 18:45:49,285 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 18:45:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:55,549 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-04-17 18:45:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:45:55,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:45:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:55,550 INFO L225 Difference]: With dead ends: 241 [2020-04-17 18:45:55,550 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 18:45:55,551 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=234, Invalid=518, Unknown=4, NotChecked=0, Total=756 [2020-04-17 18:45:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 18:45:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-04-17 18:45:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:45:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-04-17 18:45:55,555 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-04-17 18:45:55,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:55,556 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-04-17 18:45:55,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:45:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-04-17 18:45:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:55,556 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:55,556 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:55,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:55,757 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-04-17 18:45:55,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:55,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605999115] [2020-04-17 18:45:55,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:55,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605999115] [2020-04-17 18:45:55,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199475392] [2020-04-17 18:45:55,845 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:45:55,893 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:55,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:55,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:55,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:06,221 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 18:46:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:06,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:06,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:46:06,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707477342] [2020-04-17 18:46:06,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:46:06,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:06,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:46:06,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=230, Unknown=4, NotChecked=0, Total=306 [2020-04-17 18:46:06,223 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 18 states. [2020-04-17 18:46:08,582 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 18:46:12,797 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-04-17 18:46:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:25,425 INFO L93 Difference]: Finished difference Result 253 states and 584 transitions. [2020-04-17 18:46:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:46:25,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:46:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:25,431 INFO L225 Difference]: With dead ends: 253 [2020-04-17 18:46:25,431 INFO L226 Difference]: Without dead ends: 249 [2020-04-17 18:46:25,431 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=252, Invalid=556, Unknown=4, NotChecked=0, Total=812 [2020-04-17 18:46:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-04-17 18:46:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 163. [2020-04-17 18:46:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:46:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-04-17 18:46:25,433 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-04-17 18:46:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:25,434 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-04-17 18:46:25,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:46:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-04-17 18:46:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:25,434 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:25,434 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:25,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:25,635 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:25,635 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-04-17 18:46:25,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:25,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047707764] [2020-04-17 18:46:25,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:25,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047707764] [2020-04-17 18:46:25,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895408347] [2020-04-17 18:46:25,735 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:46:25,778 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:25,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:25,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:25,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:25,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:25,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:25,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818733522] [2020-04-17 18:46:25,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:25,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:25,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:25,940 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-04-17 18:46:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:26,314 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-04-17 18:46:26,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:26,314 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:26,315 INFO L225 Difference]: With dead ends: 233 [2020-04-17 18:46:26,315 INFO L226 Difference]: Without dead ends: 231 [2020-04-17 18:46:26,316 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-04-17 18:46:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-04-17 18:46:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-04-17 18:46:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-04-17 18:46:26,319 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-04-17 18:46:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:26,319 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-04-17 18:46:26,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-04-17 18:46:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:26,320 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:26,320 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:26,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:26,521 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:26,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-04-17 18:46:26,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:26,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306229745] [2020-04-17 18:46:26,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:26,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306229745] [2020-04-17 18:46:26,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340511370] [2020-04-17 18:46:26,654 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-17 18:46:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:26,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:26,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:26,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:26,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:26,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563353058] [2020-04-17 18:46:26,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:26,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:26,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:26,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:26,841 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-04-17 18:46:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:26,976 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-04-17 18:46:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:26,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:26,977 INFO L225 Difference]: With dead ends: 204 [2020-04-17 18:46:26,977 INFO L226 Difference]: Without dead ends: 202 [2020-04-17 18:46:26,977 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-04-17 18:46:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-04-17 18:46:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 18:46:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-04-17 18:46:26,981 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-04-17 18:46:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:26,981 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-04-17 18:46:26,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-04-17 18:46:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:26,981 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:26,981 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:27,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:27,182 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-04-17 18:46:27,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:27,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855042773] [2020-04-17 18:46:27,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855042773] [2020-04-17 18:46:27,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101437615] [2020-04-17 18:46:27,279 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 18:46:27,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:27,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:27,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:27,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:27,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:27,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296369678] [2020-04-17 18:46:27,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:27,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:27,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:27,449 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-04-17 18:46:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:27,720 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-04-17 18:46:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:27,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:27,721 INFO L225 Difference]: With dead ends: 225 [2020-04-17 18:46:27,721 INFO L226 Difference]: Without dead ends: 223 [2020-04-17 18:46:27,721 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-04-17 18:46:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-04-17 18:46:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 18:46:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-04-17 18:46:27,725 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-04-17 18:46:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:27,725 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-04-17 18:46:27,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-04-17 18:46:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:27,725 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:27,726 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:27,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:27,926 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:27,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-04-17 18:46:27,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:27,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225576719] [2020-04-17 18:46:27,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225576719] [2020-04-17 18:46:28,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790930313] [2020-04-17 18:46:28,009 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 18:46:28,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:28,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:28,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:28,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:32,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:32,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577393182] [2020-04-17 18:46:32,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:32,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:32,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:32,546 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-04-17 18:46:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,865 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-04-17 18:46:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:32,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,866 INFO L225 Difference]: With dead ends: 231 [2020-04-17 18:46:32,867 INFO L226 Difference]: Without dead ends: 229 [2020-04-17 18:46:32,867 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-04-17 18:46:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-04-17 18:46:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-04-17 18:46:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-04-17 18:46:32,871 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-04-17 18:46:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,871 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-04-17 18:46:32,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-04-17 18:46:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:32,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,871 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:33,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,076 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:33,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-04-17 18:46:33,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:33,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023478024] [2020-04-17 18:46:33,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023478024] [2020-04-17 18:46:33,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952513433] [2020-04-17 18:46:33,171 INFO L92 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 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 [2020-04-17 18:46:33,212 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:33,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:33,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:33,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:33,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:33,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505803488] [2020-04-17 18:46:33,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:33,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:33,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:33,347 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-04-17 18:46:33,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:33,487 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-04-17 18:46:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:33,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:33,488 INFO L225 Difference]: With dead ends: 200 [2020-04-17 18:46:33,488 INFO L226 Difference]: Without dead ends: 198 [2020-04-17 18:46:33,489 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-17 18:46:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-04-17 18:46:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 18:46:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-04-17 18:46:33,492 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-04-17 18:46:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:33,492 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-04-17 18:46:33,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-04-17 18:46:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:33,493 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:33,493 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:33,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,696 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-04-17 18:46:33,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:33,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766554022] [2020-04-17 18:46:33,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766554022] [2020-04-17 18:46:33,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560000570] [2020-04-17 18:46:33,780 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-17 18:46:33,822 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:33,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:33,823 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:33,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:33,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:33,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868040009] [2020-04-17 18:46:33,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:33,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:33,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:33,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:33,962 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-04-17 18:46:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:34,245 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-04-17 18:46:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:34,245 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:34,246 INFO L225 Difference]: With dead ends: 221 [2020-04-17 18:46:34,246 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 18:46:34,246 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 18:46:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-04-17 18:46:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 18:46:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-04-17 18:46:34,249 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-04-17 18:46:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:34,249 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-04-17 18:46:34,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-04-17 18:46:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:34,250 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:34,250 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2020-04-17 18:46:34,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,453 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:34,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-04-17 18:46:34,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:34,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698146968] [2020-04-17 18:46:34,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2020-04-17 18:46:34,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805583568] [2020-04-17 18:46:34,459 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-17 18:46:34,498 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:34,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:34,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:34,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:34,503 WARN L209 SmtUtils]: Removed 1 from assertion stack [2020-04-17 18:46:34,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,704 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 18:46:34,708 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 18:46:34,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:46:34 BasicIcfg [2020-04-17 18:46:34,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:46:34,710 INFO L168 Benchmark]: Toolchain (without parser) took 288966.39 ms. Allocated memory was 139.5 MB in the beginning and 221.2 MB in the end (delta: 81.8 MB). Free memory was 103.4 MB in the beginning and 150.0 MB in the end (delta: -46.6 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,710 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 139.5 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,711 INFO L168 Benchmark]: CACSL2BoogieTranslator took 673.27 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 101.4 MB in the beginning and 163.9 MB in the end (delta: -62.5 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,711 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.15 ms. Allocated memory is still 204.5 MB. Free memory was 163.9 MB in the beginning and 162.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,712 INFO L168 Benchmark]: Boogie Preprocessor took 27.17 ms. Allocated memory is still 204.5 MB. Free memory was 161.3 MB in the beginning and 160.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,712 INFO L168 Benchmark]: RCFGBuilder took 442.37 ms. Allocated memory is still 204.5 MB. Free memory was 160.0 MB in the beginning and 140.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,712 INFO L168 Benchmark]: TraceAbstraction took 287746.09 ms. Allocated memory was 204.5 MB in the beginning and 221.2 MB in the end (delta: 16.8 MB). Free memory was 139.4 MB in the beginning and 150.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,714 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 139.5 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 673.27 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 101.4 MB in the beginning and 163.9 MB in the end (delta: -62.5 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.15 ms. Allocated memory is still 204.5 MB. Free memory was 163.9 MB in the beginning and 162.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.17 ms. Allocated memory is still 204.5 MB. Free memory was 161.3 MB in the beginning and 160.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 442.37 ms. Allocated memory is still 204.5 MB. Free memory was 160.0 MB in the beginning and 140.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 287746.09 ms. Allocated memory was 204.5 MB in the beginning and 221.2 MB in the end (delta: 16.8 MB). Free memory was 139.4 MB in the beginning and 150.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 576 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 988 CheckedPairsTotal, 47 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 287.6s, OverallIterations: 184, TraceHistogramMax: 6, AutomataDifference: 126.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 2379 SDtfs, 16849 SDslu, 16064 SDs, 0 SdLazy, 11384 SolverSat, 4213 SolverUnsat, 47 SolverUnknown, 0 SolverNotchecked, 72.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4538 GetRequests, 852 SyntacticMatches, 156 SemanticMatches, 3530 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17966 ImplicationChecksByTransitivity, 159.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 183 MinimizatonAttempts, 8448 StatesRemovedByMinimization, 183 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 112.9s InterpolantComputationTime, 4474 NumberOfCodeBlocks, 4474 NumberOfCodeBlocksAsserted, 557 NumberOfCheckSat, 4116 ConstructedInterpolants, 44 QuantifiedInterpolants, 429676 SizeOfPredicates, 175 NumberOfNonLiveVariables, 15180 ConjunctsInSsa, 1707 ConjunctsInUnsatCore, 358 InterpolantComputations, 8 PerfectInterpolantSequences, 0/1750 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